Removal and Installation of Engine Inter Cooler

6.Motor installation (1) Motor inspection Before placing the motor in the mother machine, perform inspection for the following items. If there is a problem, perform the given procedure.

Table 8. Motor inspection and solving problems before installation

Inspection item before installation

Are there any damaged areas?

Are there any missing parts?

Is there any looseness in the tightening sections of the bolts? Solution for solving problem When installing a new motor When installing a motor stored after maintenance inspection Contact our company's service plant concerning damage that occurred during shipping. Replace parts that have been damaged during storage. Contact our company's service plant concerning parts lost during shipping. Purchase parts that have been lost during storage. If there is looseness in bolts just after delivery of the motor, contact our company's service plant for instructions on tightening bolts to the specified torque. If there is bolt loosening on a stored motor, contact our company's service plant as there is a chance that rust has formed internally. Replace damaged parts.

Purchase lost parts.

When there is looseness with bolts, disassemble again and inspect the motor for rust on the inside.

Dirt around ports When ports for lines are dirty, perform air blowing with compressed air, or cleaning with water vapor or high-pressure jet to remove dirt.

Are all of the port areas completely air-tight? When checking just after delivery When the plugs for each of the ports are loose, use after removing dirt adhered to the ports. When there are no plugs on the ports, contact our company's service plant as dirt has probably entered the motor. When ports for lines are dirty, perform air blowing with compressed air, or cleaning with water vapor or high-pressure jet to remove dirt. When the plugs for each of the ports are loose or there are no plugs on the ports, perform disassembly for confirmation that dirt has not entered the motor or there is no rust.

Is there any rust on the port sections or the installation sections on the mother machine?

Oil leaking from ports and connection surfaces When checking after storage Contact our company's service plant as rust has probably formed inside the motor.

Contact our company's service plant after confirming the presence of rust. If there is light rusting, use the motor after removing the rust. If rusting is severe, replace parts.

Contact our company's service plant if oil leaking is discovered. If oil leaking is discovered, there is probably a problem with air-tightness and rust may have formed inside the motor, so perform disassembly again to check for rust.

7.Operation check

Before performing work driving after installing the new motor or post-inspection motor in the machine main unit and completing all line operations, perform a driving check according to the procedure listed below. (1) Check before driving check [1] Fill the inside of the piston motor case with hydraulic oil Before performing a driving check, fill the inside of the piston motor case with about 500 cc of hydraulic oil from the piston motor drain port to prevent problems at the start of driving in sliding sections of the piton motor. When using a hand pump or a small-quantity electric pump for oil filling, make the internal case pressure of the piston motor 0.3 MPa or less. [2] Reduction gear lubricating oil check Use the oil fill, oil drain and oil check ports for reduction gear lubricating oil to check that the reduction gear case contains the stipulated level of lubricating oil. (See the safety cautions.) How to check the quantity of reduction gear lubricating oil in a new motor Remove the lubricating oil check port plug and check that lubricating oil flows out. If lubricating oil seems to be flowing out, return the oil check port plug to its original position and tighten it to the specified torque. If lubricating oil does not flow out even though the oil check port is open, open the oil fill port and fill with oil until reduction gear lubricating oil flows out from the oil check port. After filling with oil, return the plugs for the oil fill port and oil check port and tighten them to the specified torque.

Caution

When motors are shipped from the plant, they are filled with SAE #90 equivalent gear oil to the stipulated volume (15 L). (2) Motor operation check Slowly operate the machine and perform air-bleeding for inside the motor circuit and inside the line according the Operator's Manual for the Machine Main Unit. First, perform an operation check by repeating "C direction rotation and stopping and A direction rotation and stopping" a number of times at low-speed rotation. At this time, remaining air inside the circuit may cause abnormal noises from the valves, etc. The abnormal noises will stop as air is bled out while operation is done repeatedly at low speed. If abnormal noises go away through repeated operation over a while, there is no problem with the motor and it can be used as is. If operation is done repeatedly and abnormal noises do not stop, there is an abnormality within the motor and it should be replaced. Check for the presence of oil leaking from the motor, line port sections, each line and each piece of equipment. When oil leaking has been confirmed, retighten the bolts and line joints at the location where the leak is occurring to the specified torque. After checking is completed, raise the pressure and perform load operation, and check that no abnormal noises or vibrations, etc. are occurring in the motor. •When tightening lines, etc. after confirming oil leaking, make sure to have operation of hydraulic devices stopped. •Make sure that the operating pressure on the motor is low when checking for oil leaking. If the operating pressure is high and there is oil leaking, there is the danger of oil spraying out.

8.Troubleshooting

See the troubleshooting section below to perform checking, countermeasures and to solve problems when any kind of problem occurs in the motor during operation. [1] Piston motor troubleshooting

Trouble phenomenon Suggested cause Countermeasure and solution The motor does not rotate There is an operation problem in a piece of equipment other than the piston motor or reduction gear. After investigating whether pressure is reaching the motor inlet side, investigate the causes of problems and countermeasures for each piece of equipment and perform inspection and repair.

If the cause is in the motor itself, there is dirt clogging an operation section or there is an operation problem.

Perform disassembly and clean and remove dirt from parts before reassembling the motor. If parts are damaged due to dirt, replace the parts. Motor inlet side pressure is low. Operate the main relief valve of the circuit and raise the set pressure.

There is abnormal wear on the sliding sections of the piston motor and pressurized oil is escaping.

Damage is occurring with the main parts of the piston motor. In this instance, abnormal noise is coming from the piston motor. The load on the piston motor is too large and the relief valve is operating. Perform disassembly and replace abnormally worn parts. After completely removing surface scratching, burrs, etc. and cleaning, perform reassembly. Perform disassembly and replace damaged parts. Perform reassembly after cleaning parts. Investigate the load conditions and adjust the load to an amount appropriate to the set pressure of the relief valve.

Motor rotation speed is insufficient

Motor rotation variation is high The cause resides in the hydraulic pump, pressure control valve, flow control valve, etc. Required oil flow is not being supplied to the piston motor and rotation is insufficient.

Pressurized oil is moving from the highpressure side to the low-pressure side due to wear on the sliding sections of the piston motor (volume efficiency reduction) and speed is insufficient. There is looseness in the piston motor base plate fastening bolts. Internal leaking is increased and speed is insufficient. There is wear on the sliding sections of the piston motor and high-pressurized oil is leaking and flowing out from the drain port, which is causing speed to greatly decrease and causing rotation variation. When going down an incline, the double counter balance valve is causing hunting and rotation variation. After investigating whether the required flow is being supplied to the piston motor inlet side, investigate the causes of problems and countermeasures for each piece of equipment and perform inspection and repair. Perform disassembly, investigate the status of wear on the sliding sections of the piston motor, and perform repair and replacement according to the Maintenance Procedures.

Retighten the base plate fastening bolts to the specified torque.

Perform disassembly, investigate the status of wear on the sliding sections, and perform repair and replacement according to the Maintenance Procedures.

Perform disassembly, investigate the status of wear on the double counter balance valve, and perform repair and replacement according to the Maintenance Procedures.

Trouble phenomenon Suggested cause Countermeasure and solution

Noise is high The shaft is touching driven parts due to problems with shaft core alignment, and this is producing noise. There is wear or damage on the piston motor bearings or damage has occurred with springs, etc. and noise is being produced. Make the shaft core alignment accurate.

Perform disassembly and replace damaged parts such as bearings or springs. Perform reassembly after cleaning parts.

Oil leak There is looseness in bolts on matching surfaces, etc. and oil leaking is occurring. Oil leaking is occurring due to damage to oil seals, O-rings, packings, etc.

The amount of drain oil is high due to wear on the sliding sections of the piston motor and oil leaking is occurring due to damage to the oil seals.

Cavitation is causing abnormal noise, rotation variation and pressure variation. Drain pressure has increased due to clogging in the drain line or because the drain line is long and thin, and this has damaged the oil seals and oil leaking is occurring. The amount of hydraulic oil in the hydraulic tank has decreased and aeration is occurring due to tank taking in air.

Hydraulic oil within the motor lines and motor circuit is flowing out while hydraulic devices are turned off because the motor installation direction is inappropriate or the hydraulic tank position is inappropriate, and this is causing aeration to occur within the motor just after the motor is started.

Motor rotation stopped during operation When the motor is pumping, pressure on the motor inlet side becomes negative due to double counter balance valve operation problem, and cavitation occurs. The load is too large and this caused the engine to stall. Seizing occurred in the sliding sections of the piston motor and the motor stopped rotating. Retighten the fastening bolts to the specified torque. Perform disassembly and replace seals. Check the hydraulic oil temperature. When the temperature of the hydraulic oil is 80 ℃ or higher during operation, recheck the cooler and reduce the temperature of the hydraulic oil to below 80 ℃ . Perform disassembly, investigate the status of wear on the sliding sections, and perform repair and replacement according to the Maintenance Procedures. Replace oil seals. Perform reassembly after cleaning parts. Perform disassembly and replace oil seals. Perform drain line cleaning and remove foreign matter. Recheck lines and minimize resistance in line paths. Check the amount of hydraulic oil in the hydraulic tank and fill with hydraulic oil according to the instructions on the machine main unit.

Check the motor installation direction and correct it. Check that the oil surface within the hydraulic tank is above the motor, and either modify it so that it is above the motor or set up a self-supply circuit so that the insides of the motor circuit and lines are fully supplied with oil before driving. Perform disassembly and perform repair and replacement of the double counter balance valve according to Maintenance Procedures.

Check the load conditions and change the load to an appropriate amount. Investigate specifications values (especially flow amount and motor speed). If the motor speed has exceeded the upper limit, lower the flow amount. It is not possible to reuse the inside of the motor, so the motor should be replaced.

[2] Parking brake troubleshooting

Trouble phenomenon Suggested cause Countermeasure and solution The motor rotates if it is stopped with external load acting on the motor.

Motor drive force is not being produced. Motor is heating up to an abnormal degree. Parking brake torque has decreased due to disk wear.

The disk surface has been altered due to contact errors, etc., and the parking brake torque has decreased. The springs are worn or damaged and the parking brake torque is reduced.

The external load is too large and the parking brake capabilities are insufficient. O-rings are damaged and pressurized oil is escaping, so the parking brake cannot be released.

Foreign matter is clogging the orifice inside the parking brake release oil path and pressurized oil is not reaching the parking brake cylinder chamber, which prevents the parking brake from being released. Drain pressure has increased due to clogging in the drain line or because the drain line is long and thin, and the parking brake cannot be released. Perform disassembly and replace the parking brake disk. Perform reassembly after cleaning parts. Perform disassembly and replace the disk. Also, repair the surface of the disk companion parts and perform reassembly. Perform disassembly and replace the springs. Perform reassembly after cleaning parts. Check the external load and change the load to an appropriate amount. Perform disassembly and replace the Orings. Perform reassembly after cleaning parts. Perform disassembly and remove foreign matter from the orifice. Perform reassembly after cleaning parts. Also, flush the inside of the line.

Clean the drain line. Also, recheck the line system and minimize resistance in the line path.

[3] Relief valve troubleshooting

Trouble phenomenon Suggested cause Countermeasure and solution The motor does not rotate or motor rotation is slow. There is foreign matter caught between the poppet seat and poppet on the relief valve, which is causing seating problems, and high-pressurized oil is leaking to the lowpressure side. Perform disassembly and remove foreign matter. Perform reassembly after cleaning parts.

The relief valve spring is damaged and high-pressurized oil is leaking to the lowpressure side. The relief valve spring is worn and the set pressure is decreased, which causes the relief to operate at low pressure. There is foreign matter caught in the seat section of the free piston and base plate of the relief valve and the set pressure has decreased. Replace the relief valve. Disassemble the motor and reassemble it after cleaning each part. Replace the relief valve.

Remove the relief valve and remove foreign matter.

The motor does not stop or stopping is slow. There is foreign matter clogging the orifice set in the poppet of the relief valve, and the set pressure has decreased. There is foreign matter caught in between the poppet seat and poppet on the relief valve, which is causing seating problems, and the relief valve does not close. Remove the relief valve and remove foreign matter.

Perform disassembly and remove foreign matter. Perform reassembly after cleaning parts.

The relief valve spring is damaged and the relief does not close.

The relief valve spring is worn and the set pressure has decreased, which has caused the brake force to decrease. Replace the relief valve. Disassemble the motor and reassemble it after cleaning each part. Replace the relief valve.

There is foreign matter caught in the seat section of the free piston and base plate of the relief valve, and the set pressure and brake force have decreased. Remove the relief valve and remove foreign matter.

Shock at stopping is high There is foreign matter clogging the orifice set in the poppet of the relief valve, and the set pressure and brake force have decreased. Remove the relief valve and remove foreign matter.

There is foreign matter caught in the sliding section of the poppet and the poppet is not moving. Replace the relief valve.

There is foreign matter caught in the free piston and the piston is not moving.

Remove the relief valve and reassemble after removing foreign matter. The relief set pressure is too high. Replace the relief valve.

[4] Counter balance valve troubleshooting

Trouble phenomenon Suggested cause Countermeasure and solution The motor does not rotate or motor rotation is slow.

The motor does not stop or stopping is slow. Pressurized oil is not reaching the motor inlet and the plunger is not switching.

Pressure is reaching the motor inlet, but foreign matter is clogging the orifice in the pilot oil path and the plunger is not switching.

There is foreign matter caught in the plunger and it is not switching.

There is foreign matter caught in the plunger, so the plunger does not return and brake force has decreased.

There is damage to the plunger spring, so the plunger does not return and brake force has decreased. After investigating whether pressurized oil is reaching the motor inlet side, investigate the causes of problems and countermeasures for each piece of equipment and perform inspection and repair. Measure the pressure of the return side inside the motor circuit, and check that the pressure has increased. After this, perform disassembly and remove foreign matter. Next, perform reassembly. Perform disassembly and remove foreign matter. Investigate the degree of damage according to Maintenance Procedures and reassemble the plunger if reusing is possible. If scratching makes the plunger unusable, replace it using the base plate kit. Perform disassembly and remove foreign matter. Investigate the degree of damage according to Maintenance Procedures and reassemble the plunger if reusing is possible. If it is unusable, replace it using the base plate kit. Perform disassembly and replace the spring after removing foreign matter.

When an external load acts on the motor and pumping operation is done, rotation variation occurs. Foreign matter is clogging the orifice in the pilot oil path, and the plunger does not return or return is slow. Perform disassembly and remove foreign matter. Next, perform reassembly.

The plunger spring is not fit in place. Fit the spring correctly in place. The check valve is not fit in place. Fit the check valve correctly in place. The check valve spring is damaged. Perform disassembly and replace the spring after removing foreign matter. The check valve spring is not fit in place. Fit the spring correctly in place. There is foreign matter caught in the plunger and plunger movement is not smooth. Perform disassembly and remove foreign matter. After this, clean the plunger and perform reassembly.

The diameter of the pilot oil path orifice is wrong. Attach the correct orifice.

The pilot oil path orifice is not fit in place. Attach the orifice in the correct position.

Trouble phenomenon When an external load acts on the motor and pumping operation is done, cavitation occurs and abnormal noise is created. Suggested cause Countermeasure and solution

There is foreign matter caught in the plunger, plunger movement is poor, and counter balance functions are not fulfilled.

There is damage to the plunger spring and counter balance functions are not fulfilled.

The plunger spring is not fit correctly in place and counter balance functions are not fulfilled.

There is damage to the check valve spring and counter balance functions are not fulfilled.

The check valve spring is not fit in place and counter balance functions are not fulfilled.

Foreign matter is clogging the orifice in the pilot oil path, and counter balance functions are not fulfilled. Perform disassembly and remove foreign matter. Investigate the degree of damage according to Maintenance Procedures and reassemble the plunger if it is useable. If reusing is impossible, perform replacement with the base plate kit. Perform disassembly and replace the spring and perform reassembly after removing foreign matter. Fit the spring correctly in place.

Perform disassembly and replace the spring after removing foreign matter.

Fit the spring correctly in place.

Perform disassembly and reassemble after removing foreign matter.

[5] 2-speed control function section troubleshooting Trouble phenomenon Suggested cause Countermeasure and solution Will not switch to highspeed rotation Pilot pressure oil is not reaching the Ps port. After investigating whether pilot pressure oil is reaching the Ps port, investigate the causes of problems and countermeasures for each piece of equipment and perform inspection and repair.

There is foreign matter caught between the spool and base plate, and the spool does not switch. After performing disassembly and removing foreign matter, investigate the degree of damage according to the Maintenance Procedures and perform reassembly if reusing is possible. If reusing is impossible, perform replacement with the base plate kit.

There is abnormal wear in the 2-speed control piston section, and pressurized oil is leaking into the case. The 2-speed control piston is not fit in place. Foreign matter is clogging the orifice in the 2-speed oil path, and pressurized oil is not reaching the 2-speed control piston. Perform disassembly and replace using the flange holder kit.

Attach the 2-speed piston in the correct position. Perform disassembly and reassemble after removing foreign matter.

Switching to high-speed rotation occurs, but switching to low-speed rotation occurs if the hydraulic oil temperature increases. There is abnormal wear in the 2-speed control piston section, and pressurized oil is leaking into the case. Perform disassembly and replace using the flange holder kit.

Not switching to lowspeed rotation

Switching to low-speed rotation occurs, but switching to high-speed rotation occurs during operation. Even if the speed control switch is set to low speed, the Ps port pressure does not decrease. The 2-speed control valve spring is damaged. The 2-speed control valve spring is not fit in place. There is foreign matter caught between the spool and base plate, and the spool does not return.

Foreign matter is clogging the orifice in the 2-speed oil path, and pressure cannot escape from inside the 2-speed control piston chamber. The 2-speed control valve spring is worn and the switching pressure is reduced. Foreign matter is clogging the pilot line, and the pilot pressure increases up to switchover pressure due to leaking from the 2-speed control valve. Investigate whether the Ps port pressure is 0.5 MPa or lower and recheck the line system. Perform disassembly and replace the spring after removing foreign matter. Attach the spring in the correct position.

After performing disassembly and removing foreign matter, investigate the degree of damage according to the Maintenance Procedures. Perform reassembly if reusing is possible. If reusing is impossible, perform replacement with the base plate kit. Perform disassembly and reassemble after removing foreign matter.

Perform disassembly and replace the spring. Clean the inside of the line and remove foreign matter. Also, recheck the line system.

[6] Reduction gear troubleshooting Trouble phenomenon Suggested cause Countermeasure and solution

No rotation There is an operation problem in a piece of equipment other than the piston motor or reduction gear.

There is an operation problem in the motor aside from the reduction gear. A load exceeding the motor output torque is operating. The reduction gear angular bearing is damaged and does not rotate. After investigating whether pressure is reaching the motor inlet side, investigate the causes of problems and countermeasures for each piece of equipment and perform inspection and repair. See [1] - [5] in Troubleshooting.

After investigating the load, remove the load acting on the motor. Replace the reduction gear. Investigate whether an excessive external load is acting on the motor. If the external load is excessive, remove this load.

Abnormal noise is coming from the reduction gear during driving.

The reduction gear section is heating up to an abnormal degree. The gear inside the reduction gear is damaged and it does not rotate. The bearing inside the reduction gear is damaged and it does not rotate. The spline inside the reduction gear is damaged and it does not rotate. Replace the reduction gear.

The gear inside the reduction gear is damaged. Replace the reduction gear.

The bearing inside the reduction gear is damaged. There is wear on the sliding section of the reduction gear and interference between parts is occurring.

Perform disassembly and check the status of damage. If damage is discovered, replace the reduction gear. In there are no parts that are especially damaged, replace worn parts and reassemble after cleaning. Reduction gear lubricating oil is insufficient. Check that there are no locations from which oil is leaking. Perform disassembly and check the status of damage within the reduction gear. If damage is discovered, replace the reduction gear. Fill with lubricating oil to the stipulated volume.

There is too much reduction gear lubricating oil. The bearing inside the reduction gear is damaged. An abnormal thrust load is occurring in the reduction gear due to inappropriate thrust plate selection. Adjust the lubricating oil amount to the stipulated volume.

Replace the reduction gear.

Perform disassembly and check the status of internal damage. If damage is discovered, replace the reduction gear. If no especially notable amount of damage is discovered, replace the thrust plate with another one of the correct thickness.

Trouble phenomenon

Oil leaking is occurring Suggested cause

There is looseness in fastening bolts on the reduction gear cover, and oil leaking is occurring.

Plugs for the oil fill, oil drain and oil check ports on the reduction gear cover are loose, and oil leaking is occurring. O-rings for oil fill, oil drain and oil check ports on the reduction gear cover are deteriorating, and oil leaking is occurring.

There is cracking in the housing and oil leaking is occurring. There is foreign matter caught on the sliding surface of the floating seal and oil leaking is occurring. Oil leaking is occurring due to corrosion on the sliding surface of the floating seal. The O-ring of the floating seal is deteriorated or damaged and oil leaking is occurring. The seal collar of the floating seal is split and oil leaking is occurring. Countermeasure and solution

Remove the cover, reapply liquid packing, and tighten the cover to the specified torque. Fill with lubricating oil to the stipulated volume.

Retighten the plugs to the specified torque. After tightening, fill with lubricating oil to the stipulated volume. Replace the O-rings for the plugs. After replacement, tighten the plugs to the specified torque and fill with lubricating oil to the stipulated volume. Replace the reduction gear.

Disassemble the reduction gear, remove foreign matter from the floating seal and perform reassembly. Disassemble the reduction gear and replace the floating seal.

9.Breakdown diagram

Travel motor breakdown diagram

Travel motor structural diagram

Tightening torque

Code Screw size Tightening torque N•m Code Screw size Tightening torque N•m 2-2-4 G3/8 39.2 ± 2.0 2-21 G1 412 ± 20 2-6-2, 2-11 M5 2.45 ± 0.49 2-23, 2-24 M8 9.8 ± 1.0 2-6-3 G1/8 15.7 ± 1.0 2-25 G1/4 36.8 ± 2.5 2-6-6 M12 107.9 ± 4.9 2-28 M6 14.7 2-7 1" 5/16-12UN 412 ± 20 31 G3/4 157 ± 8.0 2-7-9 M12 39.2 ± 4.9 33 M18 439 ± 22 2-14, 2-17 G1/2 63.7 ± 4.9 34 M8 32.3

Travel motor part table

Code Part name Q'ty 1 Case 1 2 Base plate assembly 1 2-1 Base plate 1 2-2 Spool assembly 1 2-2-1 Spool 1 2-2-2 Check valve 2 2-2-3 Spring 2 2-2-4 Plug 2 2-2-5 O-ring 2 2-3 Spring seat 2 2-4 Spring 2 2-5 Spring seat 2 2-6 Cap assembly 2 2-6-1 Cap 1 2-6-2 Orifice 1 2-6-3 Plug 1 2-6-4 O-ring 1 2-6-5 O-ring 1 2-6-6 Hexagon socket head bolt 4 2-7 Relief valve assembly 2 2-7-1 Poppet seat 1 2-7-2 Relief housing 1 2-7-3 Poppet 1 2-7-4 Spring seat 1 2-7-5 Spring 1 2-7-6 Plug 1 2-7-7 Spring guide 1 2-7-8 Locking screw 1 2-7-9 Nut 1 2-7-10 Free piston 1 2-7-11 O-ring 1 2-7-12 O-ring 1 2-7-13 O-ring 1 2-7-14 O-ring 1 2-7-15 Backup ring 1 2-7-16 Backup ring 2 2-7-17 Backup ring 2 2-9 Valve assembly 1 2-9-1 Spool A 1 2-9-2 Spool C 1 2-9-3 Filter 1 2-9-4 O-ring 1 2-9-5 O-ring 1 2-9-6 Backup ring 1 2-9-7 Backup ring 1 2-9-8 Snap ring 1 2-10 O-ring 2 2-11 Orifice 2 2-13 Spring 1 2-14 Plug 1 Code Part name Q'ty 2-15 O-ring 2-16 Spring guide 2 1

2-17 Plug 2-18 Washer 1 1

2-19 Check valve 2-20 Spring 2-21 Plug 2-22 O-ring 2-23 Orifice 2 2 2 2 2

2-24 Orifice 1

2-25 Plug 2-26 O-ring 2-27 Plug 2-28 Plug 3 Shaft 4 Cylinder block 5 Valve plate 6 Piston assembly 7 Retainer plate 8 Retainer holder 9 Swash plate 10 Steel ball 6 6 1 9 1 1 1 9 1 1 1 2

11 Piston assembly 12 Spring 13 Roller bearing 14 Roller bearing 15 Collar 2 2 1 1 1

16 Pin 17 Spring 18 Friction plate 19 Disk plate 20 Friction plate 21 Brake piston 22 O-ring 23 Backup ring 24 O-ring 25 Backup ring 26 Spring 27 Knock pin 28 Oil seal 1 9 2 4 3 1 1 1 1 1 10 4 1

29 O-ring 30 O-ring 1 4

31 Plug

2 32 O-ring 2 33 Hexagon socket head bolt 9 34 O-ring 2 51 Nameplate 1 52 Striking screw 2 53 Friction plate 1

Reduction gear structure diagram

Code Part name Q'ty Code Part name Q'ty Code Part name Q'ty 01 Carrier A 1 15 Carrier C 1 29 Bolt with washer 2 02 Planetary gear A 3 16 Planetary gear C 4 30 Drum case 1 03 Needle bearing 3 17 Thrust washer 8 31 Parallel pin 4 04 Thrust washer 6 18 Shaft C 4 32 Cover 1 05 Shaft A 3 19 Spring pin 4 33 Thrust button 1 06 Spring pin 3 20 Sun gear A 1 34 Ball bearing 1 07 Washer 1 21 Sun gear B 1 35 Hexagon socket head bolt 20 08 Carrier B 1 22 Sun gear C 1 36 Plug 2 09 Planetary gear B 3 23 Ring gear 1 37 Oil motor 1 10 Needle bearing 3 24 Motor case 1 38 Hexagon socket head bolt 4 11 Thrust washer 6 25 Floating seal 2 39 Washer 4 12 Shaft B 3 26 Roller bearing 2 40 O-ring 1 13 Spring pin 3 27 Nut 1 41 Nameplate 1 14 Washer 1 28 Lock plate 1 42 Striking pin 2