Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine. |
Personal injury can result from rotating and moving parts. Stay clear of all rotating and moving parts. Never attempt adjustments while the machine is moving or the engine is running unless otherwise specified. The machine must be parked on a level surface and the engine stopped. Attach a "Do Not Operate" or similar warning tag to the start switch and controls before servicing, repairing, or making adjustments to the machine. |
Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of all fluids according to local regulations and mandates. |
Required Tools     | |||
---|---|---|---|
Tool     | Part Number     | Description     | Qty     |
A (1)     | 198-4234     | Pressure Gauge Tool Gp     | 1     |
198-4236 | Adapter Cable As     | 2     | |
B     | 251-9600     | Pressure Sensor 0 to 69000 kPa (0 to 10000 psi)     |
2     |
C     | 6V-9828     | Cap As     | 1     |
D     | 6V-9507     | Plug     | 1     |
4J-5477 | O-Ring Seal     | 1     | |
E     | 6V-9829     | Cap As     | 2     |
F     | 6V-9508     | Plug     | 2     |
6V-8397 | O-Ring Seal     | 2     | |
G     | 4C-6500     | Digital Thermometer     | 1     |
( 1 ) | Tool (A) is part of the 198-4240 Digital Pressure Indicator Group. |
- Drive the machine to a smooth, horizontal surface.
- Move propulsion lever (1) to the NEUTRAL position.
Illustration 1 | g01418103 |
- Move parking brake switch (2) to the ON position.
Illustration 2 | g01418123 |
- Move throttle control switch (3) to the LOW IDLE position.
Illustration 3 | g01418126 |
- Move engine start switch (4) to the OFF position.
Illustration 4 | g01418128 |
- Block the wheels. Block the drum.
- Assemble Tool (A). Connect Tool (A) to Tool (B) .
- Disconnect brake supply line (5) from drum. Use Tool (C) to cap port. Use Tool (D) to plug the hose.
Illustration 5 | g01419745 |
- Raise the cab. Refer to Disassembly and Assembly, KENR6047, "Cab - Tilt".
- Disconnect balance line (6) and balance line (7) from drum pump. Use Tool (E) to cap ports. Use Tool (F) to plug the hoses.
Illustration 6 | g01419763 |
Drum Pump Shown From Right Side |
- Disconnect drum interlock electrical connector (8) from the drum pump.
Illustration 7 | g01420140 |
Drum Pump Shown From Right Side |
- Connect one Tool (B) to each of the following pressure taps:
- Forward pressure tap (9) on the axle pump
- Reverse pressure tap (10) on the axle pump
- Forward pressure tap (9) on the axle pump
Illustration 8 | g01420131 |
Drum Pump Shown From Right Side |
- Move engine start switch (4) to the START position. Release the switch when the engine starts.
- Operate the engine at low idle for a few minutes. Move throttle control switch (3) to the HIGH IDLE position.
- Monitor hydraulic oil temperature with Tool (G). Operate the machine until the oil temperature reaches 43 ± 5.6 °C (110 ± 10 °F).
- Move shift switch (11) to the HIGH SPEED position. Move parking brake switch (2) to the RELEASE position.
Illustration 9 | g01420245 |
- Modulate propulsion lever (1) forward until the peak pressure is registered at forward pressure tap (9) (approximately one-half of the total travel). Read pressure on Tool (A). Move the propulsion lever to the NEUTRAL position. The pressure should be 35000 ± 1500 kPa (5075 ± 220 psi).
Note: The machine may move slightly during the next two steps. The slack must be removed from the drive line.
- Modulate propulsion lever (1) to the rear until the peak pressure is registered at reverse tap (10) (approximately one-half of the total travel). Read pressure on Tool (A). The pressure should be 35000 ± 1500 kPa (5075 ± 220 psi).
- Move propulsion lever (1) to the NEUTRAL position.
- Move throttle switch (3) to LOW IDLE position. Move shift switch (11) to the LOW SPEED position.
- Move parking brake switch (2) to the ON position.
- Move engine start switch (4) to the OFF position.
- If either pressure reading is outside the specified range, go to Step 24. If both pressure readings are inside the specified range, go to Step 29.
- Remove cap (12) from the POR valve. Loosen the locknut and rotate adjustment screw clockwise in order to increase POR pressure. Rotate the adjustment screw counterclockwise in order to decrease POR pressure.
Illustration 10 | g01420426 |
- Hold adjustment screw. Tighten the locknut.
- Go to Step 13.
- Raise the cab. Refer to Disassembly and Assembly, KENR6047, "Cab - Tilt".
- Remove Tool (B) from pressure tap (9) and pressure tap (10).
- Remove Tool (E) and Tool (F) from balance line (6) balance line (7). Reconnect both of the balance lines.
- Reconnect drum interlock electrical connector (8) .
- Remove Tool (C) and Tool (D). Reconnect brake supply line (5) to the drum motor.
- Lower the cab. Refer to Disassembly and Assembly, KENR6047, "Cab - Tilt".