Use only genuine Terex / Reedrill parts in the maintenance, rebuild, or repair, of Terex / Reedrill machines. Terex / Reedrill shall have no liability as to any unauthorized modification of machines or parts and shall have no obligation or liability as to any machines or parts which have been improperly handled, or which have not been operated, maintained, or repaired according to Terex / Reedrill's furnished manuals, or other written instructions, or which are operated with other than genuine Terex / Reedrill parts.
Your cooperation in furnishing as much information as possible will assist us in filling your orders correctly and in the shortest possible time.
Always furnish the Terex / Reedrill Model Number and Serial Number when ordering parts. This information is found on the machine nameplate.
In addition to the Serial Number, always give the part number and description of each part ordered. If there is any doubt as to the correct part number and description, furnish a dimensioned sketch or return the part to be replaced, transportation charges prepaid.
Unless otherwise instructed, all shipments will be made via motor freight collect or UPS prepaid and charged on our invoice. Shipments cannot be made on open account until your credit has been approved by our accounting department.
MAILING ADDRESS
Terex Reedrill
P. O. Box 998
Sherman, TX. 75091-0998
SHIPPING ADDRESS
Terex Reedrill
3501 S. FM Hwy 1417
Denison, TX. 75020
FOR PARTS ORDER ENTRY
within U.S.A. Telephone 1-800-854-9030
within U.S.A. Telefax 1-800-582-6570
Telephone (903) 786-2981
Telefax (903) 786-6407
FOR PRODUCT SERVICE & WARRANTY
within U.S.A. Telephone 1-800-258-0009
Telephone (903) 786-2981
Telefax (903) 786-6408
WARNING:
BEFORE operating this machine or performing any service / maintenance on it, you are advised to thoroughly read this manual. BE SURE you understand all the warnings and cautions listed in the Safety Section.
WARNING:
If the Jumbo is shipped to a new destination by people not familiar with the Jumbo, always include either a complete instruction book or a copy of the Safety Section and the following topics from Section 2:
Towing
Pre-Operation Checklist
Start-up Procedure
Engine Shutdown Procedure
Tramming Procedure
Concerning Schematics:
The hydraulic, Pneumatic and Electrical Schematics depicted in this manual are general in nature. They are intended for use in understanding how the basic systems operate. Refer to the Parts List for the specific machine for a detailed listing of the schematics.
The Terex / Reedrill MK35HE-PS is a rugged, compact, underground mining and tunneling drill jumbo that is ideally suited to operate in headings as small as 11.5 FT. (3.5m) wide and drill headings as large as 19 FT. (5.8 m) high.
The two boom, fully hydraulic MK35HE-PS jumbo includes a diesel propelled carrier with articulated steering and an electrically powered hydraulic drilling system.
A simple hydraulic system makes the MK35HE-PS suitable for extremely tough working conditions and provides low power consumption.
Equipped with Terex / Reedrill hydraulic rock drills model HPR3818, MD hydraulic boom and Timberock feed, this unit can be used for various mining and construction applications.
This jumbo has a carrier driven by a 4 cylinder liquid cooled Deutz engine, model 1013 with hydrostatic drive.
The electrically driven main hydraulic drilling system is equipped with variable volume piston pumps.
The MK35HE-PS also features low power collaring, an anti-jam system, automatic drill return system, parallel drilling system and constant sting system.
This manual provides basic safety and operating procedures along with daily maintenance and lubrication recommendations.
The Jumbo is a heavy moving machine with booms capable of extending their reach vertically and horizontally. Like all moving objects and reach extending devices, there are potential hazards associated with its use. These hazards will be minimized if the machine is properly inspected and maintained. The operators should read this manual and have been trained to use the machine in an appropriate and safe manner. Should any questions arise concerning the maintenance or operation of the machine contact Reedrill at 1-800-258-0009.
In this section and those that follow, the word:
DANGER means that severe injury or death will result from failure to follow instruction.
WARNING means that severe injury or death can result from failure to follow instruction.
CAUTION means that minor injury or property damage can result from failure to follow instruction. NOTE means that special attention should be given to the instruction.
Electrical Contact
DANGER: Will cause Serious Injury Keep all equipment parts, tools and or Death. personnel at least 10 FT. (3 m) away from all electrical power lines.
Contaminated Air
DANGER: WILL cause Serious InjuryDo Not run machine in an area or Death. without good ventilation.
Unit Overturn
WARNING: Can Cause Serious InjuryDo Not operate jumbo on grades in or Death. excess of 35% (20o).
Do Not swing booms more than 25o from centerline of machine without extending jacks.
Moving Boom or Parts
WARNING: Can Cause Serious InjuryDo Not operate machine or boom or Death. until all people are clear of the area. Do Not lubricate or service while machine is running.
High Pressure Air or Fluid
WARNING: Can Cause Serious Injury Relieve pressure on hydraulic and or Death. pneumatic systems before loosening hoses or connections.
• Do study this manual and fully understand the controls.
• Do be sure all safety guards are securely in place.
• Do wear safety helmet, glasses and hearing protection when operating or working on machine.
• Do be sure all personnel are clear of the machine and work area before starting the engine or operating machine.
• Do be sure drill area is clear of all obstructions before operating machine.
• Do use safety chain when using towbar.
• Do Not operate machine with:
• Hydraulic or air leaks
• Broken or damaged electrical wiring or components
• Damaged hydraulic hoses or fittings
• Worn or damaged parts
• Do Not refuel machine while engine is running.
• Do examine the surface of the drill face before drilling to determine the possible presence of unfired explosives.
• Do provide sufficient ventilation when running the engine in an enclosed area. Exhaust gasses contain carbon monoxide, a deadly poison, which is colorless and odorless.
• Do keep work areas clean and clear of cuttings, hand tools and other objects.
• Do Not use the machine for any other purpose than what it was designed for. This machine is designed for blasthole drilling operations only.
• Do Not wear jewelry or loose fitting clothing when working on machinery. Keep clothing and hands clear of moving parts.
• Do Not travel on grades in excess of 35% (20o), or on soft or unstable ground or close to unsupported excavations.
• Do Not move boom or machine if it is in a potentially unstable position.
• Do Not stand directly under a boom or feed.
• Do Not drill into or near a "bootleg" hole or any hole that may contain explosives.
•Follow Shut Down Procedures given in Section 2 of this manual.
• Do have two persons present when performing service work, both being fully trained on the safety issues. One person shall supervise from the operator's position and have immediate access to an emergency stop in all situations. Visual, audible or verbal communication signals must be established and understood by both persons.
• Do be sure each person is adequately trained to perform service and maintenance procedures.
• Do place a warning tag on starting controls to alert personnel that someone is working on the machine and disconnect battery before making repairs or adjustments to machine.
• Do have adequate lighting when performing service.
• Do relieve pressure on hydraulic or pneumatic systems before loosening connections or parts.
• Do be sure machine and components are well supported before servicing or replacing parts.
• Do maintain a metal-to-metal contact between the fill nozzle and fuel tank when filling the fuel tank. This will prevent sparks and the possibility of an explosion.
• Do Not service or perform maintenance while machine is running.
• Do Not hammer on coupling, bit or drill steel. Use only proper tools to make repair or adjustments.
• Do Not weld or grind near oil lines.
• Do Not attempt to remove radiator cap when engine is hot or has overheated.
• Do Not smoke or use an open flame near batteries, when servicing the batteries. Batteries can give off hydrogen which is a highly explosive gas.
• Do Not leave tools or other loose objects on the engine or drive mechanisms. They could be thrown by this equipment with a powerful force.
If all or part of the equipment is shipped to a new destination, always include a complete instruction manual or a copy of the following topics:
• Safety Section
• Operation Instructions including:
•Pre-Start Checks
• Start-up
• After Start Checks
•Shutdown Procedure
•Tramming Machine
WARNING:
If the Jumbo is shipped to a new destination by people not familiar with the Jumbo, always include either a complete instruction book or copy of the following topics from Section 2:
Towing
Pre-Operation Checklist
Startup Procedure
Engine Shutdown Procedure
Tramming Procedure
WARNING:
For towing the Jumbo, use a unit capable of handling the weight of the jumbo (approx. 40,000 lbs.[18,160 kg.]), and since the Jumbo brake is disconnected, TOW ONLY WITH A TOWBAR. DO NOT tow up or down inclines.
1.Chock wheels so jumbo cannot move in either direction.
2.Unplug all three din connectors at the dual brake valve (located under the hood at the front of the machine).
3.Make up a jumper wire for all three solenoids to ground.
4.Make up a jumper wire for all three solenoids with a hand held switch for power.
5.Connect towing vehicle with a towbar and safety chain. Towing vehicle must be able to stop both vehicles.
6.Connect a portable hydraulic power unit to the "C" port of the dual brake valve or to the service brake valve to release the axle springs. Whenever the engine stops, the brakes are automatically applied.
7.The jumbo now has no brakes of its own and stopping must be done by the towing vehicle. Remove wheel chocks and tow the jumbo to desired location.
8.After jumbo is towed to desired location, be sure to chock wheels before disconnecting jumbo from towing vehicle.
9.Release pressure from portable hydraulic power unit and reconnect fittings. Remove jumper wires from solenoids and reconnect din connectors.
(After a longer transport or a period of standstill.)
1.Inspect the jumbo for damage incurred during shipping and handling.
2.Clean the jumbo if necessary.
3.Tighten all loose bolts.
4.Check the engine according to the Detroit Diesel engine instruction book.
5. Never refuel machine while engine is running. Be sure the fuel tank is at least partially full. If the engine runs out of fuel, the complete fuel system must be bled of air and primed.
6.Check fluid level in the batteries and battery connections.
7.Be sure to turn battery disconnect switch ON.
8.For machines equipped with pneumatic tires, check the tire pressure, and inflate if necessary.
9.Prior to tramming, check that the jumbo articulation is not locked (fig. 2-3).
10.Grease all grease fittings.
11.Check the oil level in the hydraulic tank. Check oil level with outriggers, booms and feeds retracted. Check the oil level indicator mounted on the oil tank. If the hydraulic oil is low, fill it with recommended hydraulic oil, (section 3). Use the electric filling pump and the 10 micron filter. If the tank has been empty, check that the inlet lines leading from the tank to the two (2) pumps are filled with hydraulic oil. If the jumbo has not been used for a long time, extend jacks onto solid ground and extend all cylinders, then retract. Recheck oil level in the hydraulic tank. Do not operate the electric fill pump for more than two (2) minutes. Off-time must be twice on-time. Keep engine running while fill pump is in use and insure that the battery has been fully recharged before shutting off the engine.
WARNING:
DO NOT tram the machine with engine at low RPM. DO NOT release emergency/park brake until transmission is in neutral and service brake pedal is depressed.
Be familiar with all handles, switches, gauges, etc. before starting the engine. Be sure the steering valve and transmission levers are in the neutral position.
1.Complete Pre-Operation Checklist, be sure battery disconnect switch is in the ON position (fig. 2-12).
2.Turn ignition switch to ON position (fig. 2-11).
3.Depress and hold the horn bypass button (fig. 2-11).
4.Press start button. After engine starts, release horn bypass button (fig. 2-11).
Brake Release Procedure:
1.Be sure transmission and steering levers are in the neutral position (fig's. 2-10 & 2-11).
2.Depress service brake pedal (fig. 2-10).
3.Pull up emergency/park brake button (fig's. 2-11).
WARNING:
DO NOT tram the machine with engine at low RPM. DO NOT release emergency/park brake until transmission is in neutral and service brake pedal is depressed.
Be familiar with all handles, switches, gauges, etc. before starting the engine. Be sure the steering valve and transmission levers are in the neutral position.
1.Complete Pre-Operation Checklist, be sure battery disconnect switch is in the ON position (fig. 2-12).
2.Turn ignition switch to ON position (fig. 2-11).
3.Depress override button and hold (fig. 2-11).
4.Press start button. After engine starts, release override button (fig. 2-11).
Brake Release Procedure:
1.Be sure transmission and steering levers are in the neutral position (fig's. 2-10).
2.Depress service brake pedal (fig. 2-10)
3.Pull out emergency/park brake button. Push in brake reset button (fig. 2-111).
Do not shut off the engine suddenly from full load running, but let it idle for some time to allow temperature balance.
1.Be sure all controls are in the OFF or NEUTRAL position.
2.Turn the ignition switch to OFF position.
3.If machine will be shut down for more than one hour, turn battery cutoff switch OFF.
Emergency Shutdown:
In the event of an emergency situation the machine must be shutdown immediately.
1.Press and hold the EMERGENCY STOP button until the engine stops to shut down the machine.
2.Before starting the machine again, be sure all controls are in the OFF or NEUTRAL position. If a machine malfunction was the cause for the emergency shutdown, be sure all necessary repairs have been made.
WARNING:
DO NOT attempt to descend any grade steeper than the machine can climb.
DO NOT descend grades faster than the machine can travel on level ground - maximum 6 m.p.h. (9.7 km/h).
DO NOT use the parking / emergency brakes as regular service brakes.
DO NOT tram this vehicle if there is any indication of malfunction or damage to the transmission, brakes, axles or wheels.
DO NOT swing either boom more than 250 from centerline of machine. If a boom is positioned 250 or more from center, the carrier may become unstable and could tip over.
Refer to the following four pages for location of tramming and carrier controls. The location of some controls on some machines, compare your machine with the photo's on the following pages.
•Booms, drills and feeds should be retracted as far back as possible. Center the Booms, i.e. bring ends of the booms together in a horizontal position.
•Be sure no hoses are dragging on the ground while the jumbo is moving.
•Be sure the Outriggers are completely raised and retracted.
•Move the forward/reverse transmission control lever to the direction of travel. Forward is the boom end of the jumbo.
•Move the transmission speed control lever to the speed you want and release the emergency/ parking brake. The jumbo should always be trammed at a relatively high engine speed. If the engine is lugging down, select a lower transmission speed. If the engine is operated at low speed for extended periods of time, glazing of the piston rings will result and the engine will produce excessive smoke.
Before the jumbo is trammed to the drilling area, a properly sized electrical trailing cable should be connected and wound onto the cable reel. It should be noted that the ampacity of electric cable is generally limited by the temperature rating of the insulation. Cable wound onto a cable reel cannot adequately dissipate heat and must be severely derated as a function of the number of wraps of cable on the drum. Other factors such as the desired cable length and the voltage drop due to resistance should also be considered when sizing the cable, as well as, the ambient temperature of the operating environment. Consult the cable supplier for recommendations.
After the jumbo has been set up and properly stabilized, the electric trailing cable must be connected to the AC electric power source in the mine (see "Cable Reel Operation"). The cable reel collector ring has provisions for a ground check conductor in addition to the three main phase conductors and the ground conductor.
WARNING:
It is highly recommended that the connection point for the trailing cable plug-in be equipped with a ground check and or ground fault interrupter system to protect personnel and equipment from potentially dangerous electrical faults.
To unspool the trailing cable from the jumbo cable reel (fig. 2-13), shift the cable reel directional control valve handle (fig. 2-14) to the FREE OUT position. In this position, the valve will allow the hydraulic motor driving the cable reel to rotate freely. The cable may simply be pulled off the reel and plugged into the power system.
The cable may also be unspooled from the reel by tramming the jumbo to the drilling area after securing the cable and plug assembly at the power system connection. The cable may be unspooled by placing the cable reel directional control valve handle in the FREE OUT position with little resistance to the rotation of the cable reel. The valve may also be placed in the TENSIONED OUT position (center or neutral position of the handle) which will cause the cable reel motor to create a resistance to rotation of the cable reel.
When unspooling cable in the TENSIONED OUT mode, hydraulic fluid exiting the cable reel drive motor is forced over the cable reel relief valve (this valve is located near the cable reel motor), maintaining a constant resisting pressure which exerts a tensioning resistance to unspooling of the cable. It is important that the cable reel relief valve setting not be too high, as this will cause excessive tensile strain on the cable which may damage the cable. The pressure is the same for both unspooling the cable under tension and spooling the cable onto the reel.
When the cable reel directional control valve handle is placed in the REEL IN position, the cable is pulled back onto the reel. The cable reel relief valve must be set to limit the hydraulic operating pressure of the drive motor so cable is picked up from the ground with moderate force as the jumbo advances toward the attachment point of the cable. where it is secured.
WARNING:
Two people are required to make cable reel adjustments. One person MUST BE at the controls at all times while adjusments are being made.
1.Unspool all the trailing cable so it is on the ground in a straight line.
2.Turn the relief valve adjustment screw counterclockwise to its minimum setting.
3.Place cable reel directional control valve handle in the REEL IN position.
4.Turn the relief valve adjustment screw clockwise to increase pressure until cable is lifted off the ground at least 6.5 ft. (2 meters) out from the jumbo.
1.Cable reel speed may be adjusted with the needle valve (fig. 2-14).
2.As the cable is being spooled onto the reel, the reel may tend to overspeed as the end of the cable is approached. The speed control valve should be adjusted to limit the maximum speed of the reel such that it remains at moderate speed at all times, especially as the end of the cable is reached when damage to the plug or other components may occur.
WARNING:
DO NOT attempt to descend any grade steeper than the machine can climb.
DO NOT descend grades faster than the machine can travel on level ground - maximum 6 m.p.h. (9.7 km/h).
DO NOT use the parking / emergency brakes as regular service brakes.
DO NOT tram this vehicle if there is any indication of malfunction or damage to the transmission, brakes, axles or wheels.
DO NOT swing either boom more than 250 from centerline of machine. If a boom is positioned 250 or more from center, the carrier may become unstable and could tip over.
1.Tram the jumbo to the drilling area and position the machine so the feeds and booms can reach the maximum number of drill hole locations.
2.With the engine running, fully extend the right and left hand horizontal outrigger extensions and lower the jacks to securely stabilize the jumbo (fig's. 2-15, 2-16). The front of the jumbo need not be raised to the maximum height for good stability, but the weight of the front of the machine should rest of the jacks rather than the tires.
3.Adjust canopy height as desired (fig. 2-14).
1.Emergency Stop
2. Incorrect Phase Light
3. Power On / Correct Phase Light
4. Left Hydraulic Run
5. Right Hydrulic Run
6. Left Hydraulic Perc.
7. Right Hydraulic Perc.
8.Left Hyd. Overload Reset
9. Right Hyd. Overload Reset
10. Water Pump Overload Reset
1. Water Booster Pump
3. Drill Lights
WARNING:
BEFORE initial start-up of jumbo, the main switchbox must be checked by a qualified electrician. All circuit breakers should be closed and the main switchbox door should be closed and secured with the fasteners.
The main switchbox door IS NOT to be opened by the jumbo drill operator.
ALL checks are to be made by a qualified electrician.
1.Set the parking/emergency brake on the jumbo, stop engine and turn ignition switch to OFF.
2.Turn on the electric power and close the main circuit breaker on the main switch box.
3.Turn on the drilling lights from the pushbutton box in the center of the drill console.
4.Connect the flushing water (fig. 2-13) and start the water booster pump from the pushbutton box in the center of the drill console.
If the pump will not start, the trail cable may be improperly connected and the phase sequence relay on the machine may not be energized, preventing starting.
1. Water Booster Pump
2. Water Connection
Check the water pressure. The hydraulic drilling system is water cooled (not air cooled). At least 50 PSI (3.4 bar) water pressure should be available before starting the main pump units. For drilling use minimum 80 PSI (5.5 bar).
NOTE
If water pressure is too low, the low water pressure switch installed at the water booster pump outlet will activate. This in turn will activate the ADC system, shifting the feed control lever to the reverse position and applying hydraulic pressure to the hammer control valve spool to keep it in the OFF position. This will render the drilling system inoperative.
Be sure that all control levers are in neutral position. Insure that the pump unloading valves (fig. 2-19) are in the "unloaded" position and start the main pump for the hydraulic drilling system. Let the pump run unloaded for a few minutes, particularly if the hydraulic oil is cold. The electric pump motors should always be started and stopped with the pump unloaded.
1.Position the jumbo near the drill face so all holes can be drilled without moving the jumbo.
2.After setting jacks, move the boom and feed into position for drilling the first hole.The angle of the drill feed to the drill face is controlled by the feed swing lever and the feed dump lever.
2a.The feed is automatically kept parallel. See previous description of feed paralleling system. Once selected, the angle of the feed will automatically be kept the same from hole to holeas long as the feed swing lever, the feed dump lever and powered dump feed lever for bolting are not moved.
2b.Select the angle of the feed (hole) with the feed dump lever and the feed swing lever and then place the drill holes where they are wanted on the drill face with the boom lift, boom swing, boom extension, feed roll levers. Drill all holes slightly upward (if possible), (except the lifters). This will help to get all cuttings out of the holes and keep the holes free from water. If lifters must be very flat, drill lifters with the drill feed rotated on its side.
3.Use the feed extend lever and sting the end of the feed into the rock. The feed extend lever may be left in the full forward position to maintain constant stinging pressure on the feed extension cylinder. This will assist the operator in maintaining hole alignment.
CAUTION:
Never use drill feed and feed extension cylinder at the same time. Never press the bit against the rock face with the feed extension.
In some instances, it is not possible to use feed sting due to a very uneven tunnel face, in this case collaring must be done very carefully.
4.Turn water valve ON and be sure water is flowing out of the drill bit.
5.The anti-jam lever should be up (ON).
6.The hole collaring lever shoud be up (ON).
7.Push the drill rotation lever into the forward rotation (counterclockwise) position.
8.Push the drill (hammer) lever and the feed lever forward all the way to collar the hole.
9.After the hole is collared (drill bit about 2-3" [5-7.6 cm] deep into the rock), push the hole collaring lever down (OFF). Full pressure is now available to the drill and feed for normal drilling.
10.Drilling is now automatic. If "bad ground" us encountered, the anti-jam system will back the drill out and resume forward travel when the "bad ground" is cleared and solid rock is again encountered. At the end of the hole, the drill hammer will automatically shut off and the feed direction will reverse, bringing the drill steel out of the hole.
At the end of the hole the drill operator may choose to turn the water off and turn the air on to blow the hole clean as the drill is being retracted.
11.Move the rotation lever back to center position to stop drill rotation when the bit clears the hole.
12.Turn air/water valve OFF.
The drilling sequence is now complete.
Push the hammer lever forward. Ease the feed lever forward and move the rock drill forward on the feed until the bit contacts the rock. Do not push the feed lever all the way forward until collaring of the hole has been accomplished. After you have drilled a collar of 2 to 3" (5 to 7.6 cm), ease the feed lever into its forward position. It is not necessary to push lever into the spring override position. The rock drill will automatically drill the hole.
Often it is desirable to use the semi-automatic hole collaring circuit, especially when drilling into a slanted or highly irregular face. As with manual collaring, the hammer and rotation will be in the ON (forward lever movement) position and the bit will be just contacting the face. However, the collaring circuit toggle valve should be in the UP (ON) position and the feed lever may be pushed fully forward. After sufficient hole collaring has occurred, the toggle valve may be switched DOWN (OFF) and the feeding force and hammer power will rise to normal drilling levels. At the completion of the hole, two things happen simultaneously:
1.The hammer will shut off.
2.The rock drill will return to the back of the feed. If desired, the air/water valve may be switched to AIR to clean the hole of the flushing water.
If, during the drilling cycle, some incompetent ground is encountered, the anti-jam system will activate. The operator will note the drill backing out of the hole and then returning to the forward direction of travel. The anti-jam system will continue to operate until the bit is clear in the hole. When the anti-jam system is functioning, the operator should normally not attempt to operate the feed lever. If, for some reason, the operator feels it necessary to operate the feed lever, the anti-jam valve should be switched OFF and the feed lever returned to neutral for a few seconds to completely render the anti-jam system inoperative. It is desirable for the operator to develop a drilling sequence, which minimizes hole-to-hole movement and boom interference.
Push the hammer valve forward or ON. Leave the rotation lever in its neutral position. Use the feed lever, and gently push the bit against the rock. Let it hammer for a few seconds.
Operating the hammer for extended periods with loose drill string parts can cause damage to shanks, couplings, bits and drill steel.
Check for oil leakage from hoses and connections. If encountered, make necessary corrections. Never tighten hydraulic hose connections while system is pressurized. Check for water leakage from the front head of the rock drill. If extensive leakage is observed, stop drilling and call the service person to replace water seals.
Watch for excessive vibration of the hoses. Excessive vibration indicates the drill accumulators are not properly charged. In such a case, stop drilling immediately and call for the service person. Watch for hoses becoming tangled when the boom is moved, particularly, when boom rollover function is used.
Check the condition of the filter bypass indicator windows while the drill is operating. Yellow or red showing in the window indicates a filter that is either bypassing, or nearly ready to bypass; and it should be changed immediately. Operating a unit with dirty filters will lead to premature failure of hydraulic components.
As standard the booms are delivered with a feed table dump feature. For roof bolting, use the positioner lift lever (fig. 2-20, item 10) for vertical feed positioning. The feed tables are bolted in the face drilling or bolting position. Remove the locking bolt before actuating the valve to reposition the feed table, then reinstall locking bolt.
If, during the drilling operation, the machine shuts down unexpectedly, indicator lights on the pushbutton box at the drill console normally indicate the cause of the shutdown, such as:
•Low hydraulic fluid level.
•High hydraulic fluid temperature in the hydraulic tank.
1.Be sure drills are fully retracted on the feeds and all controls are in the OFF or NEUTRAL position.
2.Shut off water pump and drill lights at the pushbutton box.
3.Place main pump load/unload valve in the UNLOAD position.
4.Push left and right pump stop buttons.
5.Open main circuit breaker on main switchbox.
6.Disconnect trailing cable plug from mine power supply.
Follow jumbo start-up and tramming instructions and cable reel operation. Spool trailing cable onto cable reel, retract front outriggers and tram jumbo back from drilling face.
1.Water Booster Pump - Start
2. Left Hydraulic Pump Motor - Start
3. Right Hydraulic Pump Motor - Start
4. Water Booster Pump - Stop
5. Left Hydraulic Pump Motor - Stop
6. Right Hydraulic Pump Motor - Stop
7. Drill Lights
8. Emergency Stop Button
In the event of an emergency situation, push the EMERGENCY STOP button on the pusbutton box located between the left and right drill consoles (fig's. 2-18).
If condensation is a problem in the main switchbox, it is recommended that the main switchbox heater be turned on while the jumbo is shutdown. To do this, the jumbo must be connected to the AC mine power supply via the trailing cable.
1.Close the main circuit breaker.
2.Turn the heater switch ON at the pushbutton box.
3.Temperature is controlled by a rheostat mounted on the main switchbox.
NOTE
The heater should not be turned on during normal drilling operations.
1. Air/Water Pressure
2. Feed Pressure
3. Rotation Pressure
4. Hammer Pressure
5. Drill Pressure
6. Feed Roll
7. Feed Extend
8. Feed Swing
9. Feed Dump
10. Positioner Lift
11.Boom Extend
12.Boom Swing
13.Boom Lift
14.Feed Control
15.Drill Rotation Control
16.Hammer Control Valve
17.Feed Override Control
18.Feed Collaring Pressure Adj.
19.Collaring On/Off Valve
20.Air/Water Valve
21.Anti-Jam On/Off Valve
1.Air/Water Pressure Gauge - monitors flushing pressure so maximum drilling efficiency can be maintained by the hydraulic rock drill.
2.Drill Pump Pressure Gauge - monitors hydraulic system pressure.
3.Feed Pressure Gauge - monitors hydraulic pressure to feed drive (may be adjusted to drilling conditions).
4.Rotation Pressure Gauge - monitors hydraulic pressure in drill rotation circuit.
5.Hammer Pressure Gauge - monitors hydraulic pressure to rock drill.
6.Feed Roll - Moving lever forward, rolls feed to right (clockwise), moving lever back rolls feed to left (counterclockwise).
7.Feed Extend - Moving lever forward, extends feed forward, moving lever back, retracts feed.
8.Feed Swing - Moving lever forward, swings front of feed to right, moving lever back swings front of feed to left.
9.Feed Dump - Moving lever forward, moves front of feed down, moving lever back moves front of feed up.
10.Positioner Lift - Moving the lever forward, moves the power dump feed table up to 90o from the rotary actuator, moving the lever back move the power dump feed table down. This is used for roof bolting, ring or fan drilling operations.
11.Boom Extend - Moving lever forward extends boom forward, moving lever back retracts boom.
12.Boom Swing - Moving lever forward, swings boom to right, moving lever back, swings boom to left.
13.Boom Lift - Moving lever forward, moves boom down, moving lever back moves boom up.
14.Feed Control - Moving the lever forward, causes the rock drill to move forward toward the end of the feed. Moving the lever back reverses the oil flow to the feed, and the rock drill returns to the back of the feed. In the forward feeding position, you will note a spring override in the control lever; moving the lever into the spring override position allows for high speed or fast forward of the rock drill on the feed.
15.Drill Rotation Control - Moving the lever forward, starts rock drill rotation in the counterclockwise direction, which is the normal direction for drilling. Moving the lever backward reverses rotation for uncoupling steel or any function requiring reverse rotation.
16.Hammer Control Valve - controls the flow of oil to the hammer oscillator. The valve is normally placed in the full ON (forward) position, which starts the flow of oil to the oscillator at a reduced pressure for collaring the hole. After the hole is properly collared and full feed pressure is applied, the oscillator pressure automatically increases to full system pressure.
17.Feed Override Control - Moving lever back can be used to increase feed retract pressure for bringing the bit out of a drilled hole. This also increases the speed of the rock drill return. This can be used by the operator for bringing the drill out of the hole faster after drilling is completed. The lever is spring-loaded and will return to its normal position when released.
CAUTION:
The feed override control should never be pulled while rock drill is being operated in a forward or drilling condition. This will result in excessive feed thrust, causing jamming or damage to the drill steel.
18.Feed Collaring Pressure Adjustment - When the collaring valve (19) is ON (valve lever up) the collaring pressure can be adjusted to suit the drilling situation. This pressure adjustment reduces the feed pressure to make it easier to start the hole on uneven surfaces. The factory setting for the feed pressure is about 1050 PSI (72.4 bar) and the feed collaring pressure is about 750 PSI (51.7 bar). These are starting points for reference and may need to be adjusted to suit your situation. The feed collaring pressure is usually set about 300 PSI (20.7 bar) less than normal feed pressure.
Hammer Collaring Pressure Adjustment - This is normally set at 2000 PSI (138 bar).
19.Collaring On/Off Valve - Moving the lever to the UP position, activates the collaring circuit to start the hole at reduced feed pressure, which is controlled by the collaring pressure adjustment valve (19).
20.Air/Water Valve provides flushing water or blowing air for hole cleaning.
21.Anti-Jam On/Off Valve - Moving the lever to the UP position, activates the anti-jam system. This is used to help prevent the drill bit from getting stuck in the hole.
The variable factor utilized in the anti-jam system is rotation pressure. Rotation pressure will remain relatively constant with any given bit size, type, feed pressure, and type of rock. If the rotation pressure should increase, due to bad ground conditions, seams or cracks, a rise in pressure will be noted. This rise in pressure is used to signal the feed system of the possibility of jamming the bit. Rotation pressure is sensed by an adjustable sequence valve (item1). Fluid is allowed to pass to the pilot end of the spring biased directional valves. This pressure overcomes the spring and shifts the valves to reverse the flow to the feed cylinder. As the feed retracts the bit from the hole, rotation pressure decreases and the sequence valve spool shuttles closed and stops the flow of oil to the directional valves. The fluid trapped in the pilot circuit then drains to the reservoir through the reaction time orifice needle valve (item 3). When the pressure drops sufficiently, the spring bias shifts the directional valves back to their normal position, the flow to the feed circuit resumes its normal path and the bit is moved forward into the hole. This sequence will repeat itself as many times as is required to clear the hole so normal drilling can continue.
The sensitivity of the system is determined by how close to the normal rotation pressure the sequence valve (item 1) is adjusted. Backing the adjustment out will increase the sensitivity of the system. Turning the screw in will decrease the sensitivity (require the rotation circuit to develop a higher working pressure before the sequence valve shifts to make the feed reverse).
The reaction time orifice (item 3) determines how far the feed will retract before recycling. Turning the adjustment in will close the orifice and cause a longer cycle time. Backing out the adjustment will open the orifice and cycle time will become much faster.
The reaction time orifice must always be open at least 1 or 2 turns; otherwise, the directional valve will shift and remain shifted because leakage fluid will be trapped in the pilot line. It should also be noted that the reaction orifice is an extremely sensitive adjustment.
With all other factors already determined (feed pressure, bit type and hole size) set up and drill. When drilling, open the reaction time orifice 4 or 5 turns. Back the sequence valve adjustment out until anti-jam begins to function. Turn the reaction time adjustment in until the rock drill backs up about 6 to 12 inches (152-305 mm) before recycling and moving forward again. Screw the sequence valve adjustment back in about 1-1/2 to 1-3/4 turns. Readjustment may be required to accommodate changes in rock conditions.
The feed circuit has two (2) internal relief cartridges and one (1) external relief valve. The cartridge in the compensator section is for the feed override function, and is set at 2500 PSI (172.4 bar). Feed pressure is controlled by the remote relief cartridge, which is located in the end of the valve manifold. Feed pressure is usually set at 1050 PSI (72.4 bar). Also connected to this circuit are the collaring on/off and pressure adjustment valves. The feed pressure will correspond with the lowest relief setting which is in fluid communication with the feed compensator. For instance, with the feed override valve in its normal position and the collaring valve in the ON (up) position, the feed pressure will be controlled by the collaring relief valve (usually set at approximately 750 PSI [51.7 bar]). When the collaring valve is shifted to the OFF (down) position, the next lowest relief setting in communication with the compensator is the remote relief cartridge which controls feed pressure during normal drilling (1050 PSI [72.4 bar]). When the feed override valve is shifted, this relief is isolated from the compensator, and the feed override relief takes over (2500 PSI [172.4 bar]).
The compensator used for the drill (hammer) circuit is basically the same as the one in the feed circuit. The relief cartridge is capable of controlling pressure (by throttling the flow) as low as 1400 PSI (96.6 bar) for hole collaring to full system pressure for drilling. Fluid is supplied to the drill at collaring pressure when the valve lever is activated. As the bit makes contact with the rock, feed pressure increases. When feed pressure reaches the setting of the hammer sequence valve (900 PSI [62 bar]) located in the anti-jam valve module (fig's. 2-23), the sequence valve shifts, allowing forward feed pressure to provide a pilot signal to the hammer compensator. The presence of a pilot signal at the hammer compensator causes the hammer operating pressure to switch from the low power collaring pressure (usually 2000 PSI [138 bar]) to full system pressure.
Whenever forward feed pressure is less than the setting of the hammer sequence valve, the hammer will operate at the lower power “collaring” level. Since the feed collaring pressure is normally set at 750 PSI (51.7 bar) and the hammer sequence valve is set at 900 PSI, the hammer will be operating at lower compensated pressure (2000 PSI [138 bar]) when the feed collaring on/off valve is in the ON (up) position.
When the collaring on/off valve is placed in the OFF (down) position, the forward feed pressure increases to 1050 PSI (72.4 bar) which is higher than the hammer sequence valve setting of 900 PSI (62 bar) and the hammer operating pressure will increase to full (system) pressure.
Obviously, whenever forward feed pressure drops below 900 PSI (62 bar), the hammer pressure also drops. This occurs during the reversing of the feed during anti-jam cycling or whenever the feed is reversed by the operator or anytime resistance to the forward movement of the bit is removed as when encountering a void in the rock.
The drill control valve bank provides easy control of rotation, feed and hammer functions.
The rotation section is comprised of a directional valve and an inlet section. The pressure setting of the rotation pump is normally 2500 PSI (172.4 bar) and the flow set at approximately 10-15 GPM (37.9-56.9 liter/m).
The feed circuit is somewhat different in that two (2) internal relief cartridges and one (1) external relief valve are used. The cartridge in the compensator section is for the feed override function, and is set at 2500 PSI (172.4 bar). Feed pressure is controlled by the remote relief cartridge, which is located in the end of the valve manifold. Feed pressure is usually set at 1050 PSI (72.4 bar). Also connected to this circuit are the collaring on/off and pressure adjustment valves. The feed pressure will correspond with the lowest relief setting which is in fluid communication with the feed compensator. For instance, with the feed override valve in its normal position and the collaring valve in the ON (up) position, the feed pressure will be controlled by the collaring relief valve (usually set at approximately 750 PSI [51.7 bar]). When the collaring valve is shifted to the OFF position, the next lowest relief setting in communication with the compensator is the remote relief cartridge which controls feed pressure during normal drilling (1050 PSI [72.4 bar]). When the feed override valve is shifted, this relief is isolated from the compensator, and the feed override relief takes over (2500 PSI [172.4 bar]).
The compensator used for the drill (hammer) circuit is basically identical to the one in the feed circuit. The relief cartridge is capable of controlling pressure (by throttling the flow) as low as 1400 PSI (96.6 bar) for hole collaring to full system pressure for drilling. Fluid is supplied to the drill at collaring pressure when the valve lever is activated. As the bit makes contact with the rock, feed pressure increases. When feed pressure reaches the setting of the hammer sequence valve (900 PSI [62 bar]) located in the anti-jam valve module, the sequence valve shifts, allowing forward feed pressure to provide a pilot signal to the hammer compensator. The presence of a pilot signal at the hammer compensator causes the hammer operating pressure to switch from the low power collaring pressure (usually is 2000 PSI [138 bar]) to full system pressure.
The jumbo is equipped with an automatic retract and drill shutoff feature. The system is comprised of a pressure reducing valve, located in the drilling console, which supplies reduced system pressure to a mechanical cam valve, located on the drill feed. This mechanical cam is located just to the rear of the hose tensioning device.
During the drilling cycle, this cam valve provides a drainage path to tank for the hammer and feed control valve end caps. When the rock drill reaches the end of its travel, the cam valve is depressed by a triggering device, located on the traveling hose reel. This trigger can be re-positioned on the traveling hose reel for fine tuning the length of the rock drill travel.
When the trigger depresses the spring lever on the cam valve, the valve shifts fluid from the pressure reducing valve at a pressure of 400 PSI (27.6 bar), pressurizes the appropriate end of the control valve chamber; and physically shifts the valve spool. This causes the feed lever to shift to the RETRACT position; the hammer lever returns to the OFF position. The rock drill, then, moves to the rear of the feed.
When the low water pressure solenoid valves receive a signal from the low water pressure switch (located at the water pump) they activate the ADC system. This causes the drills to shut off and return to the back of the feed. The low water pressure solenoid valves are mounted under the right and left drill control consoles (fig. 2-26).
Because the functions of both the lift and the swing paralleling system are identical, only the principles will be discussed here. The parallel system is comprised of a master cylinder, mounted at the boom base, and a slave cylinder, mounted at the positioner. In the vertical plane, the positioner dump cylinder is the slave. In the horizontal plane, the positioner swing cylinder is also the slave.
When the boom lift lever is operated at the console, fluid is directed to the main boom lift cylinder causing the boom to raise or lower. The master cylinder is forced to move because of a direct mechanical connection to the boom. As the master cylinder moves, fluid is displaced from the end of the cylinder in which the piston is moving. That fluid moves to the same end of the slave cylinder causing the slave cylinder to move in the opposite direction (see fig. 2-27). This reverse direction cylinder movement causes the feed to lift/dump inversely to the boom movement, thereby maintaining the same angle to the face at all times.
The boom swing works on the same principle, but in the horizontal plane. When fluid is directed to the boom swing cylinder, the master cylinder also moves because of a direct mechanical connection. When the master cylinder is forced to move, the slave creates parallel movement of the positioner.
Each parallel system is equipped with an externally mounted dual counterbalance valve. This valve performs the following functions:
1.Prevent fluid from returning to the reservoir through the control spool when parallel system is functioning.
2.Provides a relief path for excessive pressure in parallel system.
When the operator moves the positioner dump or positioner swing control lever, fluid is directed through the external counterbalance valve to the cylinder being operated. Because the master cylinder is mechanically locked in its position, the fluid is directed to the positioner cylinder. This allows independent operation of the positioner dump and swing.
This feature allows the operator to maintain constant pressure on the feed stinger while drilling. This aids in maintaining drill steel alignment and reduces down time from stuck or broken drill steels. The boom control valve bank is set for a maximum pressure of 2500 PSI (172.4 bar). This pressure is too high for this function, and might result in a bent feed. By utilizing a pressure reducing valve in the feed extension circuit, the pressure can be reduced to allow stinging — but not bending of the feeds.
Adjustment Procedures (to be done by the maintenance department):
1.Remove the forward direction feed extension hose at the cylinder; cap the fitting.
2.Install a 3000 PSI (206.9 bar) gauge in the end of the hose.
3.Start the pump.
4.Push feed extension lever forward.
5.Use a 3/16" (5mm) allen wrench, adjust valve to desired pressure of 1050 PSI (72.4 bar).
The valve is located in the drilling console.
6.Tighten lock nut and replace the hose on the cylinder.
Keep hydraulic swing limit circuit in good working order to prevent damage to the boom.
This circuit is comprised of one (1) cam valve mounted between the boom mounting base and the main boom pivot for each boom, one (1) in-line shuttle valve, along with appropriate hosing and fittings which provide for connection between the boom lift and boom swing circuits. Its purpose is to limit the outward swing angle of the boom when the boom is raised above horizontal. Due to the geometric relationships of the boom swing cylinder attachment points, as the boom is raised, the geometry of swing cylinder changes in such a way that the boom can swing to extreme angles relative to the mounting base. If left unchecked, the boom and mounting components can mechanically interfere and damage to these parts can result.
Upon reaching the swing limit setting when the boom swing cylinder is extending, the cam valve is activated by a "trigger" (a small length of rod or bar attached to the main boom pivot) preventing the swing cylinder from extending by blocking off the exhaust path of the cylinder. The boom swing control valve can retract the swing cylinder but cannot extend it when the cam valve is depressed. If the boom lift is actuated, fluid from the circuit causes the swing cylinder to retract as the boom is lifting, thereby, maintaining the predetermined boom swing angle limit.
1. Check the oil level in the hydraulic tank by reading the oil level indicator mounted on the tank. Only refill with the fill-pump and through the filter. Do not mix types of fluid.
2. Check bolts on booms and look for any signs of structural damage or weld cracking. Tighten all loose bolts and have any structural damage or cracked welds repaired immediately by a qualified service person.
3. Check to insure that the drill mounting bolts and side rod bolts (if applicable) on rock drills are tight.
4. Check engine fuel tank level. Prevent the tank from running dry, otherwise fuel filter and injection lines will need air-venting after the refilling.
5.* Grease the lubrication points on the carrier in the articulation steering system; one on each cylinder and the articulation pins.
6.* Grease the rear axle oscillation cradle pins
7. Grease the booms at all lubricating points.
8. Grease the feeds at all lubricating points.
9. Grease the lubrication points on the rock drills, preferably twice during the shift. Apply a couple of shots with a grease gun. Overgreasing can damage shank seal or penetrate into the rotation motor. If the front part of the drill is getting too hot, it may be an indication for need of lubrication. If greasing does not help, contact the service person for inspection and repair.
*A central grease fitting manifold is provided to grease these points from one central location (fig. 2-30).
1. Every 10 engine running hours, check engine oil level with the dipstick. (for new engine every 5 hours for the first 40 hours.) See engine instruction book.
2. Every 10 engine running hours, check transmission fluid level with the dipstick.
3. Every 10 engine running hours check engine coolant level.
4. Every 100 Engine running hours, check the V-Belts pulling the engine fan and alternator. The maintenance department must check the diesel engine regularly, according to the diesel engine instruction book.
5. Every 100 engine hours, grease the grease points of the front jacks.
6. Every 100 Engine running hours, check the oil level in the planetary gears in the wheels. Place the filling Plug and the wheel center horizontal in relation to each other. Fill oil through the filling plug until full.
7. Every 100 engine running hours check the oil Level in the:
Axles differential housing
Transfer cases
8. Every 100 engine running hours, but at least once a month, check the electrolyte level in each battery cell. If the electrolyte level is low, fill with distilled water only.
9. Every month check the feed mounting tables. Add or remove shims until the feeds slide smoothly.
10. Every time the drill shank is changed, take out the chuck and the thrust plate and check if they are in good condition. If the thrust plate shows signs of overheating, it may be due to lack of lubrication; it could also indicate drilling with dull bits or wrong feed pressure.
WARNING:
DO NOT attempt lubrication or service while the machine is running. BE SURE the hydraulic system is not pressurized before loosening any connections or parts.
CAUTION:
To avoid unnecessary machine repairs, keep the following in mind when handling fuels and lubricants:
Clean grease fittings with a clean cloth before greasing. Keep all fuels and lubricants stored in clean and tightly sealed containers.
Keep filler caps clean of dust and oil. Replace filters inside a shop or when there is no visible dust in the air.
NEVER reuse paper filters.
Wash metal parts of filters with clean oil, but do not wipe the parts with a cloth.
Wipe up any overspill with a clean cloth. Keep dirt and dust from entering any fluid system. Keep the fuel storage containers and system filled.
Watch for metal filings on any magnetic drain plugs. Filings are a sign of internal component wear or maladjustment. If the source can be determined and repaired as part of scheduled maintenance, costly down time can be avoided later.
Preventive maintenance is vital to personnel protection and lower operating costs. The Jumbo requires regularly scheduled maintenance to keep it operating efficiently.
The maintenance intervals presented in this section are recommended by Terex Reedrill. The actual operating environment of the machine may dictate a reanalysis of the maintenance interval for a specific operation.
For efficient maintenance of the machines, it is suggested that a log book be established to record the date and engine hours when each maintenance was done.
WATER
CARRIERCARRIER
Torque Values: Bolts, Screws and Studs (Lubricated or Plated) Tolerance Values in all cases to +5 % - 0 % of the Value listed below.
Note: K=.15 for plated or lubricated fasteners. K=.20 for non-lubricated fasteners. Torque values for non-lubricated fasteners can be found by multiplying the plated fastener value by 1.33.
A.Start-Up - Grease and Oil
1.Grease all fittings - multi-purpose grease (NLGI#2)
2.Engine fuel - Diesel
3.Engine oil
4.Main motor grease
5.Engine air cleaner oil
6.Axle oil - ring and pinion / reducer box / planetaries
7.Hydraulic oil (Mobile DTE 18 or Equivalent)
8.Prime power steering pump
9.Prime Right and Left Hand Main Pumps
B.Back Out - Power Steering Pump Compensator
C.Back Out Pressure Reducing Valves for Feed Extend
D.All Levers in Neutral
E.Joystick in Neutral
F.Install All Gauges
1.Pump suctions
2.System pressure (tram pump)
3.Charge pressure (tram pump)
4.Feed extend
G.Use Auxiliary Hydraulic Power Source to Retract all Boom and Feed Functions
1.Feed retracted
2.Drill retracted
3.Booms inboard and horizontal
4.Outriggers up
H.Charge Drill High Pressure Accumulators
I.Charge Drill Low Pressure Accumulators
1.Install articulation lock bar and jack rig so all wheels are off the ground.
2.Start engine - idle only.
3.Check engine oil pressure.
4.Check power steering suction.
5.Check charge pressure - 50 - 60 PSI (3.5 - 4.1bar)
6.Check alternator charging.
7.Check for leaks.
8.Idle engine for 15 minutes to circulate oil. Note all pressures and temperatures.
9.Check hydraulic oil level.
10.Set idle at 700 RPM.
11.Move transmission selector to forward and reverse, check for proper wheel rotation.
12.Check V-Belts for slippage.
13.Push in emergency brake button and check for brake engagement.
14.Shut down engine.
15.Lower jumbo and remove articulation lock bar.
16.Restart engine - idle at 700 RPM.
17.Move steering control forward and back and check steering cylinder movement.
18.Move machine slightly forward.
19.Place transmission shifter in reverse.
20.Move machine slightly in reverse.
21.Cycle machine for right and left steer to remove air.
22.Engage emergency brake.
23.Try to move machine forward and reverse, brake should prevent machine from moving.
24.Machine is now functional for propel, braking and steering.
New or Reconditioned Machines
1.Connect water line
2.Install gauges in outrigger cylinders. Set sequence valves at 1800 PSI (124.1 bar)
3.Extend outriggers
4.Install gauge 0-3000 PSI (0-206.8 bar) in feed extend cylinder. Set feed extend pressure reducing valve at 1000 PSI (69 bar). This adjustment required for right and left hand booms.
5.With outriggers down, cycle all boom / positioner / feed function relationships.
Valve handle back - moves device UP, IN or to the LEFT
Valve handle forward - moves device DOWN, OUT or to the RIGHT
6.Check hydraulic reservoir level
7.Check for leaks
8.Run cable reel
9.Set cross port relief valve at 300 PSI (20.7 bar)
Pumps
New or Reconditioned Machines
1.Connect electric power.
2.Connect air and water lines.
3.Check for leaks.
4.Jog pump motors and check for proper rotation. Jog water pump motor and check for proper rotation. Jog compressor motor and check for proper rotation.
5.Install suction and by-pass gauges.
6.Set control valves in neutral position.
7.Start right hand pump motor. Check for leaks.
8.Check suction pressure - 1 - 2" (2.5 - 5 cm) Hg.
9.Observe hydraulic oil level.
10.Set ADC pilot pressure at 400 PSI (27.6 bar).
11.Observe hydraulic tank flow and aeration.
12.Start left hand pump in same manner.
13.Run main pumps and cycle all functions slowly to remove any remaining air.
14.Cycle all functions and observe system for leaks or any other malfunctions.
15.Check system temperature - 120-1600 F (49-710 C).
The following is a list of terms commonly used in the mining and construction industry. This list is not exhaustive, but pertains primarily to underground jumbos as discussed in this manual.
Anti-Jam .........................A hydraulic system that senses a change in drill rotation and automatically retracts and extends drill steel to get through “bad ground” and prevent steel from getting stuck.
Belleville Washer
Another name for “Spring Washer”.
Bleed(ing) ......................A procedure to remove trapped air from a fluid.
Boom ............................Horizontal structure that supports and positions the feed. One end attaches to a pivot at the boom bulkhead at the front of the machine, the other end attaches to the positioner. Some booms are extendable, others are fixed (non-extendable).
Centralizer .....................A device used to keep the drill steel centered with respect to the centerline of the feed. An end centralizer is located at the front end of the feed. It sometimes has jaws that open and close around the drill steel, but allow the drill steel to pass through and rotate freely. The jaws are also used to clamp around the drill steel coupling and hold it tight for threading and unthreading of drill steel. A mid-point or travelling centralizer is used on long feeds to support the mid-point of the drill steel.
Collar(ing) ......................A term referring to starting a hole, whereby reduced hammer and feed pressure is used to get a hole started or "collared" straight.
Drifter ............................Another term for a rock drill. In this manual the term "rock drill" is used for consistancy.
Drill Rod Another name for “drill steel”.
Drill Steel .......................A specially made length of steel with threads on both ends to allow coupling together and to the drill shank and drill bit. The drill steel transfers energy from the drill to the bit and is also used to convey air or water for hole cleaning.
Drill Steel Coupling .........A devise used to join two pieces of drill steel together and to join the drill steel to the drill shank, by means of internal female threads or sometimes male and female threads.
Drill String ......................Refers to multiple pieces of drill steel joined together.
Dump ............................Term used to describe the position of the feed relative to the centerline of the boom. Dump UP tilts back of feed towards boom, dump DOWN tilts the back of feed away from boom.
Extend ...........................To move object OUT or AWAY from machine in the horizontal plane, or to move object TOWARD the ground in the vertical plane.
Feed ..............................Structure used to support the rock drill and drill steel. The rock drill moves up and down the feed by means of a chain drive system, or in some cases a cable or hydraulic cylinder drive system. Feeds come in various lengths, depending on length of drill steel required.
Feed Mounting ............... Another name for “Feed Table”
Feed Table ....................A device that attaches to the positioner by means of a pin and hydraulic cylinder, and is used to support the feed.
Hammer ........................A term sometimes used for "rock drill".
Hammer(ing) ..................A term used to describe the action of the drill hammer or piston striking the drill shank, thus transferring the blow energy through the drill steel to the bit.
Oscillator .......................A term sometimes used for the rock drill "hammer".
Positioner ......................A device attached to the end of the boom, that allows the feed to pivot and be positioned at various angles.
Rattle ............................A term used to describe loosening the drill string joints by “hammering” the drill steel, by using short bursts of the hammer with no feed pressure on the drill bit.
Retract .........................To move object IN or TOWARDS the machine in the horizontal plane, or to move object AWAY from the ground in the vertical plane.
Rock Drill .......................The device that provides the percussive and rotation forces for drilling. Sometimes referred to as the “hammer” or “drifter”.
Shank ............................A specially made short length of steel with splines at one end and threads at the other end. The splined end is inserted into the rock drill and engages the splines of the chuck end of the drill. The drill steel attaches to the other end by means of a coupling.
Spring Washer ...............A cup shaped washer that, when compressed provides a “spring like” action. Also called "belleville washer".
Sting .............................To apply pressure to the rock face by extending the feed to prevent the feed from moving while drilling.
Stinger ..........................A device attached to the end of the feed which contacts the rock face to stabilize the feed while drilling.
Swing ............................Term used to indicate movement of a component to right or left, relative to the machine as viewed from rear.
Tram.............................To move and steer the machine from the tram station.