CATERPILLAR 426 LOADER OPERATION MANUAL 7BC

426 BACKHOE LOADER 7BC0000101877 (MACHINE) POWERED BY D4.236 EN...

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Shutdown SIS Previous Screen Product: BACKHOE LOADER Model: 426 BACKHOE LOADER 7BC Configuration: 426 BACKHOE LOADER 7BC00001-01877 (MACHINE) POWERED BY D4.236 ENGINE

Operation and Maintenance Manual 416, 426, 428, 436 & 438 BACKHOE LOADERS Media Number -SEBU6232-02

Publication Date -01/10/1989

Date Updated -11/10/2001

Product Identification and Serial Number Locations SMCS - 7606 The Product Identification Number (PIN) will be used to identify powered earthmoving equipment that is designed for an operator to ride. The PIN will have the same prefixes and continue in the sequence as the current Serial Numbers.

For quick reference, record the identification numbers in the spaces provided below the photographs.

Product Identification Number (PIN) ____________________

Engine Serial Number ____________________

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Transmission Serial Number ____________________ Copyright 1993 - 2022 Caterpillar Inc.

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Shutdown SIS Previous Screen Product: BACKHOE LOADER Model: 426 BACKHOE LOADER 7BC Configuration: 426 BACKHOE LOADER 7BC00001-01877 (MACHINE) POWERED BY D4.236 ENGINE

Operation and Maintenance Manual 416, 426, 428, 436 & 438 BACKHOE LOADERS Media Number -SEBU6232-02

Publication Date -01/10/1989

Date Updated -11/10/2001

Specifications and Model Views SMCS - 7606

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Transmission - 4-speed forward and reverse - full synchromesh gearbox. Constant mesh gears on all ratios permits on-the-go shifting 1st through 4th and down 4th through 1st. Neutral start provision prevents starting machine in gear.

Transmission Disconnect

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Hand operated power disconnect for on-the-go shifting and fast loader lift, dump and lower with engine running at high rpm.

Reversing Shuttle Conveniently placed, hand operated lever provides instant direction changes from forward to reverse with power hydraulic clutches.

Rear Axle Heavy duty industrial axle with inboard planetary reduction and differential lock.

Front Axle Oscillation 11° each direction from centerline.

Switch on instrument panel engages front wheel drive (if equipped), on the move, in any gear, forward or reverse.

Final drive from differential to front wheels by way of planetary reduction in each wheel. Planetary units can be removed independently of wheels. On-the-go shifting 1st through 4th and down 4th through 1st is retained in 4wd.

Pallet Forks (Europe Only) The safe working load for the fold down pallet forks used with the multi-purpose bucket on the backhoe loader is 1000 kg (2200 lb) at 610 mm (24 in) load centers.

Brakes - Two oil disc brakes on final drive output shafts.

Fully enclosed, mechanical self-energizing oil disc brakes on final drive output shaft. Foot operated, pedal interlock for roading, or independently for working applications.

Travel Speed The following travel speeds are for a standard 416 backhoe loader, equipped with 16.9 × 24 rear tires, at full throttle.

The following travel speeds are for a standard 426 backhoe loader, equipped with 16.9 × 24 rear tires, at full throttle.

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The following travel speeds are for a standard 428/436backhoe loader, equipped with 16.9 × 28 rear tires, at full throttle.

The following travel speeds are for a standard 438 backhoe loader, equipped with 18.4/15 × 26 rear tires, at full throttle.

Steering - Steering unit provides manual steering capability in case of power failure.

Type ... Front wheel Power steering ... Hydrostatic Cylinder ... Double acting Backhoe Buckets

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Loader Buckets

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9R5866 uni-tooth special is available for all loader buckets.

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Shutdown SIS Previous Screen Product: BACKHOE LOADER Model: 426 BACKHOE LOADER 7BC Configuration: 426 BACKHOE LOADER 7BC00001-01877 (MACHINE) POWERED BY D4.236 ENGINE

Operation and Maintenance Manual 416, 426, 428, 436 & 438 BACKHOE LOADERS Media Number -SEBU6232-02

Publication Date -01/10/1989

Date Updated -11/10/2001

Foreword SMCS - 7606 This manual contains operation instructions, lubrication and maintenance information, specifications and basic removal and installation instructions.

The "Operation Section" is a reference for the new operator and a refresher for the experienced one.

Read - study - and keep it handy.

Illustrations guide the operator through the correct procedures of checking, starting, operating and stopping the machine.

Operating techniques outlined in this publication are basic. Skill and techniques develop as the operator gains knowledge of the machine.

The "Maintenance Section" is a guide to equipment care. The illustrated, step-by-step instructions are grouped by machine service hour intervals.

Items in the "Maintenance Intervals" section are referenced to detailed instructions in the maintenance section.

Use the service hour meter to determine servicing intervals. Calendar intervals shown (daily, weekly, monthly, etc.) may be used instead of service meter intervals if they provide more convenient servicing schedules and approximate the indicated service meter reading. Recommended service should always be performed at the interval that occurs first.

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Under extremely severe, dusty or wet operating conditions, more frequent lubrication than is specified in the "Maintenance Intervals" section of this manual may be necessary.

Perform service on items at multiples of the original requirement. For example, at Every 500 Service Hours or 3 Months, also service those items listed under Every 250 Service Hours or Monthly, Every 50 Service Hours or Weekly and Every 10 Service Hours or Daily.

Some photographs in this publication may show details or attachments that may be different from your machine. Also, guards and covers may have been removed for illustrative purposes.

Continuing improvement and advancement of product design may have caused changes to your machine which may not be included in this publication.

Whenever a question arises regarding your machine, or this publication, please consult your Caterpillar dealer for the latest available information.

Metric Metric Hardware - This machine is almost totally metric design. Specifications are given in metric measurement and U.S. measurement. Metric hardware must be replaced with metric hardware. Check parts book for proper replacement.

NOTE: Use only metric tools on most hardware for proper fit. Other tools could slip and possibly cause injury.

Copyright 1993 - 2022 Caterpillar Inc.

Wed Nov 2 20:25:01 UTC+0530 2022

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Shutdown SIS Previous Screen Product: BACKHOE LOADER Model: 426 BACKHOE LOADER 7BC Configuration: 426 BACKHOE LOADER 7BC00001-01877 (MACHINE) POWERED BY D4.236 ENGINE

Operation and Maintenance Manual 416, 426, 428, 436 & 438 BACKHOE LOADERS Media Number -SEBU6232-02

Publication Date -01/10/1989

Date Updated -11/10/2001

After Starting the Engine SMCS - 7606

Keep the engine speed low until the engine oil fault alarm and indicator shuts off. If the light will not shut off within ten seconds, stop the engine. Investigate the cause before starting again.

Transmission/converter temperature and the voltmeter gauge should be in the green zone.

1. Allow the engine to warm up at LOW IDLE for five minutes. With the boom in the LOCK position, cycle the cylinders to circulate the oil and hold the BOOM DOWN control for one minute, then release for one minute. Repeat this procedure until hydraulic system is warm enough to operate implements.

2. Look at the gauges frequently during operation.

3. The parking brake indicator will remain on until the parking brake is released.

Test Parking Brake System

Be sure that the area around the machine is clear of personnel and obstructions.

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Test the brakes on a dry, level surface.

Fasten the seat belt before testing the brakes.

1. Start the engine and raise the implements slightly.

2. With the parking brake applied, shift the transmission to 3rd gear forward.

The parking brake light must come on.

3. Gradually increase the engine speed close to HIGH IDLE. The machine must not move.

If the machine begins to move, reduce the engine speed immediately and apply the service brake pedals.

4. Reduce engine speed, shift the transmission to NEUTRAL, engage neutral lock, lower the implements to the ground, and stop the engine.

See "Parking and Service Brakes" in the "Maintenance Intervals" section of this manual.

NOTICE If the machine moved while testing, have your Caterpillar dealer inspect the brakes. If necessary, repair the parking brake before returning the machine to operation.

Copyright 1993 - 2022 Caterpillar Inc.

Wed Nov 2 20:28:05 UTC+0530 2022

All Rights Reserved.

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Shutdown SIS Previous Screen Product: BACKHOE LOADER Model: 426 BACKHOE LOADER 7BC Configuration: 426 BACKHOE LOADER 7BC00001-01877 (MACHINE) POWERED BY D4.236 ENGINE

Operation and Maintenance Manual 416, 426, 428, 436 & 438 BACKHOE LOADERS Media Number -SEBU6232-02

Publication Date -01/10/1989

Date Updated -11/10/2001

Attachment Controls SMCS - 7606

Backhoe Stabilizer Controls

Backhoe stabilizer and bucket operation control directions, are viewed looking from operator's seat straight ahead to backhoe bucket.

Move lever (4) to control left stabilizer.

Move lever (5) to control right stabilizer.

Stabilizer Down (1) - Move the lever to this position to lower the stabilizer. This will raise the rear of machine.

Stabilizer Hold (2) - Release the lever from up or down position to stop stabilizer movement.

Stabilizer Up (3) - Move the lever to this position to raise the stabilizer. This will lower the machine.

NOTE: Be careful raising stabilizers. Stabilizers can be the only restraint preventing the machine from falling into the excavation. Engage parking brake before raising stabilizers if operating on a slope.

Fully raise or lower stabilizers to avoid hitting with backhoe when swinging to either side.

Use the stabilizers to lift and level the machine before operating backhoe.

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Backhoe Boom - Standard Two Lever

Lower Boom (1) - Move the lever to this position to lower the boom.

Raise Boom (2) - Move the lever to this position to raise the boom.

Swing Left (3) - Move the lever to this position to move the boom to the left. Boom should move in the direction the lever is pushed.

Swing Right (4) - Move the lever to this position to move the boom to the right. Boom should move in the direction the lever is pushed.

Hold (5) - Move the lever to this position to stop movement of the boom. Release the lever from any position and it will return to HOLD. NOTE: Stabilizers should be in the full up or down position when swinging 90° to either side.

Backhoe Stick and Bucket - Standard Two Lever

Stick Out (1) - Move the lever to this position to move the stick out.

Stick In (2) - Move the lever to this position to dig with the bucket.

Bucket Load (3) - Move the lever to this position to dig with the bucket.

Bucket Dump (4) - Move the lever to this position to empty the bucket.

Hold (5) - Move the lever to this position to stop movement of the stick and bucket. Release the lever from any position and it will return to HOLD.

Sideshift Lock (428 and 438)

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Sideshift Pedal - Push and hold down the pedal to unlock sideshift. Use the bucket to push or pull the sideshift to the desired position. Release the pedal and move the bucket control to close position to lock sideshift.

Extendable Stick Pedal and Auxiliary Pedal (If Equipped)

When equipped with extendable stick foot pedal, right pedal will always be control.

Stick Extend Out (1) - Push down on the toe end of pedal to extend the stick out. This will move the stick farther out for additional reach.

Hold (2) - Release the pedal and it will return to HOLD. Stick movement will stop.

Stick Retract In (3) - Push down on the heel of pedal to slide the stick in.

Auxiliary Pedal (4) (If Equipped) - Left pedal will be auxiliary.

Backhoe Three

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Bucket Dump (1) - Move the lever to this position to empty the bucket.

Bucket Hold (2) - Move the lever to this position to stop bucket movement. Release the lever from either position and lever will return to HOLD. Bucket Load (3) - Move the lever to this position to fill the bucket.

Stick Out (4) - Move the lever to this position to move stick out.

Stick Hold (5) - Move the lever to this position to stop stick movement. Release the lever from either position and lever will return to HOLD. Stick In (6) - Move the lever to this position to move stick in.

Boom Down (7) - Move the lever to this position to lower the boom.

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Boom Hold (8) - Move the lever to this position to stop boom movement. Release the lever from either position and lever will return to HOLD. Boom Up (9) - Move the lever to this position to raise the boom.

Swing Left (10) - Push pedal down to swing boom to the left. Release to stop movement.

Swing Right (11) - Push pedal down to swing boom to the right. Release to stop movement.

Three Lever With Auxiliary Lever Stick Extend Out (1) - Move the lever to this position to extend the stick out.

Hold (2) - Move the lever to this position to stop stick movement. Release th lever from either position and it will return to hold.

Stick Retract In (3) - Move the lever to this position to retract the stick.

Backhoe Four Lever Control

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Stick Out (1) - Move the lever to this position to move the stick out.

Stick Hold (2) - Move the lever to this position to stop stick movement. Release the lever from either position and lever will return to HOLD. Stick In (3) - Move the lever to this position to move the stick in.

Boom Down (4) - Move the lever to this position to lower the boom.

Boom Hold (5) - Move the lever to this position to stop boom movement. Release the lever from either position and lever will return to HOLD. Boom Up (6) - Move the lever to this position to raise the boom.

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Shutdown SIS Previous Screen Product: BACKHOE LOADER Model: 426 BACKHOE LOADER 7BC Configuration: 426 BACKHOE LOADER 7BC00001-01877 (MACHINE) POWERED BY D4.236 ENGINE

Operation and Maintenance Manual 416, 426, 428, 436 & 438 BACKHOE LOADERS Media Number -SEBU6232-02

Publication Date -01/10/1989

Date Updated -11/10/2001

Before Starting the Engine SMCS - 7606

Walk-Around Inspection For your own safety and maximum service life of the machine, make a thorough walk-around inspection before mounting the machine to start the engine.

Look around and under the machine for such items as loose bolts, trash build-up, oil or coolant leaks, broken or worn parts. Inspect the condition of the hydraulic components.

1. Inspect the backhoe and loader buckets, linkages, cylinders, lines and bucket teeth for damage or excessive wear. Repair if damaged before operating.

2. Inspect and repair any converter or transmission leaks. Check around the seals and covers. Also, check the hoses around the transmission.

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3. Inspect and repair any hydraulic system leaks. Inspect hoses, seals and around flanges.

4. Remove dirt and trash build-up in and around the engine and under the operator's compartment. 5. Inspect and repair any engine compartment leaks. Check around all seals and covers.

6. Inspect and repair any cooling system leaks. Check the hoses, radiator fins, radiator cap and the drain area.

7. Inspect and repair any drive wheel bearing leaks.

8. Inspect and replace and/or repair damaged and excessively worn tires. Tighten any loose bolts and replace any that are missing. Check for proper tire inflation.

9. Inspect the engine precleaner for dirt build-up. Empty the bowl when dirt is near the FULL mark.

10. Service the air filter elements when the yellow piston enters the red area in the indicator. See "Maintenance Intervals" section for filter element changing.

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11. Inspect steps and handholds for condition and cleanliness. Repair or clean if necessary. Inspect the Rollover Protective Structure (ROPS) for damage. Have your Caterpillar dealer repair if necessary.

12. Be sure covers and guards are firmly in place. Inspect for damage or for loose and missing bolts.

13. Make sure the horn, back-up alarm, lights, etc., are in proper working order.

14. Remove the fuel fill cap.

15. Maintain the fuel level close to the top of the tank to avoid expansion spillage.

16. Inspect and replace broken lights, bulbs and lenses.

17. Inspect and repair the instrument panel when broken gauges and lights are noticed.

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18. Inspect the seat belt and mounting for excessive wear and damage. Replace if damaged.

19. Adjust the seat to allow full brake pedal travel with the operator's back against seat back.

20. Adjust the mirror to allow proper viewing from the seat to see close behind the machine.

21. Adjust the seat belt to fit snug.

22. With the machine weight on the front wheels, turn the steering wheel so the front wheels turn from the centered position, stop-to-stop and return to the centered position to verify functioning of the emergency steering system. Failure of the front wheels to complete the above cycle indicates malfunction of the emergency steering system and the machine should not be driven until repair is made.

With the machine stopped, two hands may be required to turn the steering wheel.

23. See the "Maintenance Intervals" section for additional daily checks, such as oils, coolants, lubricants, etc.

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Shutdown SIS Previous Screen Product: BACKHOE LOADER Model: 426 BACKHOE LOADER 7BC Configuration: 426 BACKHOE LOADER 7BC00001-01877 (MACHINE) POWERED BY D4.236 ENGINE

Operation and Maintenance Manual 416, 426, 428, 436 & 438 BACKHOE LOADERS Media Number -SEBU6232-02

Publication Date -01/10/1989

Date Updated -11/10/2001

Cooling System Specifications SMCS - 7606

General NOTICE To prevent burns and to prevent damage to the engine, never add coolant to an overheated engine. Allow the engine to cool first.

Check the specific gravity of the antifreeze solution frequently in cold weather to ensure adequate protection.

If the engine is to be stored in, or shipped to, an area with below freezing temperatures, the cooling system must be protected against freezing to the lowest expected outside (ambient) temperature or else drain the cooling system and engine.

All water is corrosive at engine operating temperature. The cooling system should be protected with a 3% to 6% concentration of cooling system conditioner at all specified service intervals regardless of the concentration of antifreeze.

Do not use Caterpillar Cooling System Conditioner with Dowtherm 209 Full-Fill coolant. Follow the instructions provided with the Dowtherm 209 Full-Fill coolant.

If Cooling System Conditioner additions are not made every 250 service hours as recommended, the drain period must be reduced to every 2000 service hours or 1 year.

Filling at over 20 liters (5 U.S. gallons) per minute can cause air pockets in the cooling system.

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After draining and refilling the cooling system, run the engine with the filler cap off until the coolant reaches normal operating temperature and the coolant level stabilizes. Add coolant as necessary to fill the system to the proper level.

Operate with a thermostat in the cooling system all year-round. Cooling system problems can arise without a thermostat.

Water Hard water, or water with high levels of calcium and magnesium ions, encourages the formation of insoluble chemical compounds by combining with cooling system additives such as silicates and phosphates.

The tendency of silicates and phosphates to precipitate out-of-solution increases with increasing water hardness. Hard water, or water with high levels of calcium and magnesium ions encourages the formation of insoluble chemicals, especially after a number of heating and cooling cycles. Caterpillar prefers the use of distilled water or deionized water to reduce the potential and severity of chemical insolubility.

Using water that meets this requirement may not prevent drop out of these chemical compounds totally but should minimize the rate to acceptable levels.

For more information refer to "Know Your Cooling System" Form SEBD0518.

Antifreeze Use Caterpillar Antifreeze or equivalent Most commercial antifreezes are formulated for gasoline engine applications and will, therefore, have high silicate content. Caterpillar antifreeze is formulated with the proper coolant additives for heavy duty diesel engines. Caterpillar Antifreeze is available through Caterpillar dealers using the following chart:

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The major advantages of Caterpillar antifreeze are: * Significantly reduces water pump seal leakage problems due to the over concentration of chemical additives. * There is no need to add coolant inhibitor on initial fill which must be done with current commercially available antifreezes.

High silicate antifreezes used with a supplemental coolant conditioner can cause a buildup of solids over a period of time which can cause plugging, loss of heat transfer, and water pump seal damage. * Make proper antifreeze additions.

Adding pure antifreeze as a makeup solution for cooling system top-off is an unacceptable practice. It increases the concentration of antifreeze in the cooling system which increases the concentration of dissolved solids and undissolved chemical inhibitors in the cooling system. Add antifreeze mixed with water to the same freeze protection as your cooling system. * Use lesser amounts of antifreeze.

The reason for the use of ethylene glycol antifreeze is strictly for freeze protection. Use only the amount of antifreeze necessary for the environmental temperature. If operating in warm climates [above 0°C (32°F)], use of plain water treated with a supplemental coolant inhibitor package is sufficient to protect the engine against corrosion and pitting.

Caterpillar recommends the use of a coolant mix containing a minimum of 30% Caterpillar Antifreeze and acceptable water. This 30% mixture is necessary to maintain an adequate water pump cavitation temperature for efficient water pump performance. Only use a greater concentration (above 30%) of Caterpillar Antifreeze as needed for anticipated outside (ambient) temperatures. The maximum concentration should not exceed 60% to minimize deposit formations in the cooling system.

Use the chart below to assist in determining the concentration of antifreeze to use.

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Service your cooling system fluid properly.

Do not use both liquid coolant conditioner and coolant conditioner elements. Change the coolant at the established maintenance interval. Check the cooling system regularly for the correct concentration of cooling system conditioner using the Caterpillar 8T5296 Coolant Conditioner Test Kit.

NOTICE Use a mixture of approved fill water and Caterpillar antifreeze or equivalent. Add Cooling System Conditioner only at specified intervals.

Caterpillar recommends 30% to 60% antifreeze content.

To prevent damage to your engine, never add coolant to an overheated engine. Allow the engine to cool first.

Dowtherm 209 Full-Fill coolant is not compatible with other antifreezes and coolant mixtures.

Dowtherm 209 Full-Fill coolant cannot be substituted for ethylene glycol, due to its inability to raise the water pump cavitation temperature. Dowtherm 209 Full-Fill coolant lowers the coolant's boiling point.

If you choose to use Dowtherm 209 Full-Fill coolant, then contact your Dowtherm supplier for the proper inhibitor package.

Do not use Caterpillar liquid cooling system conditioner with Dowtherm 209 Full-Fill coolant.

Coolant Conditioner Cooling system coolant conditioner is necessary to prevent cylinder wall pitting. Most commercially available antifreeze solutions DO NOT contain sufficient coolant conditioner. See the following topic "Conditioner" and the "Cooling System" section of this Publication for precharge and maintenance recommendations and procedures.

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NOTICE Always add Caterpillar Cooling System Conditioner or equivalent to water. Never use water only. Maintain a 3% to 6% concentration of conditioner in the cooling system to help prevent corrosion.

To prevent overinhibiting the engine's cooling system, never add liquid coolant conditioner to Caterpillar Antifreeze at initial fill. Caterpillar Antifreeze contains the necessary precharge of coolant conditioner.

The use of these inhibitors together could result in a conditioner concentration that would exceed the Caterpillar recommended maximum of 6%.

The over concentration of a conditioner will deposit on the higher temperature surfaces of the cooling system and create a barrier that reduces the engine's heat transfer characteristics. Reduced heat transfer could cause cracking of the cylinder head and other high temperature components. Excessive concentrations of conditioner could also accelerate water pump seal wear.

Conditioner can be purchased from your Caterpillar dealer.

Use Caterpillar Cooling System Conditioner or equivalent. Follow the instructions on the container. If you choose to not use Caterpillar Antifreeze or equivalent, on initial fill of a new or reconditioned engine, add 1 liter (1 quart) of Caterpillar Cooling System Conditioner, or equivalent, for each 30 liters (8 U.S. gallons) so that the cooling system will have a 3% to 6% concentration of conditioner.

To maintain a 3% to 6% concentration of conditioner, add liquid cooling system conditioner every 250 service hours or oil change, whichever occurs first.

Use the 8T5296 Coolant Conditioner Test Kit to check for concentration. Add 1.0 liter (1 quart) of Caterpillar Cooling System Conditioner for each 152 liters (40 U.S. gallons) of coolant capacity.

NOTICE

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Excessive coolant conditioner (greater than the recommended 6% initial fill) together with concentrations of antifreeze greater than 60% cause deposits to form and may result in overheating.

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