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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. |
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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. |
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| 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 | 8T-0454 | Flow Meter Gp | 1 |
| B | 122-6872 | Hydraulic Hose (72 in) | 2 |
| C | 128-6842 | Connector | 1 |
| D | 124-2121 | Coupling | 3 |
| E | 6V-9007 | Elbow | 2 |
| F | 6V-9746 | O-Ring Seal | 4 |
| G | 6V-5050 | O-Ring Seal | 2 |
| H | 124-2153 | Coupling | 1 |
Note: Perform this test if the rotor differential is overheating.
Note: Assemble Tool (E) and Tool (A) .
Note: Assemble the hose using Tool (B), Tool (D) and Tool (H) .
- Park the machine on a smooth, horizontal surface.
- Move propulsion lever (1) to the NEUTRAL position.
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| Illustration 1 | g01181258 |
- Move parking brake switch (2) to ON.
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| Illustration 2 | g01181260 |
- Stop the engine.
- Move rotor latch (3) to the LOCKED position.
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| Illustration 3 | g01181269 |
- Remove the rear belly pan, which is below the rotor transmission.
- Install 90 degree fitting (4) of the assembled hose onto the pump. Connect the other end of the hose to Tool (A) .
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| Illustration 4 | g01181272 |
- Connect the remaining assembled hose to Tool (A), and connect the opposite end of the hose to Tool (C). Attach this assembly to hose (5), which was removed from the pump.
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| Illustration 5 | g01181273 |
- Start the engine.
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| Illustration 6 | g01181274 |
- Move rotor latch (3) to the UNLOCKED position.
- Move rotor switch (7) to the ON position.
- Move rotor speed switch (8) to position 1.
- Move throttle switch (9) to the HIGH IDLE position. The engine speed should be 2000 ± 50 rpm.
- Operate the engine at HIGH DLE. Monitor the hydraulic oil temperature on oil temperature gauge (6). Operate the machine until the oil temperature reaches 43° ± 5.6°C (110° ± 10°F).
- Read the flow on Tool (A). The flow should be 26.5 ± 1.8 L/min (7 ± 0.5 US gpm).
- Turn rotor switch (7) to the OFF position.
- Stop the engine. If the flow rate is below the specified range, go to Step 19. If the flow rate is inside the specified range, go to Step 20.
- Move rotor latch (3) to the LOCKED position.
- Examine the strainer on the inlet to the gear pump for debris. If necessary, replace the strainer. Refer to the Operation and Maintenance Manual, for the procedure to replace the strainer.
- Go back to Step 9. If the flow is still below the specified range, change the pump.
Note: Large particles in the strainer may indicate a differential failure.
- Remove the Tool, and reconnect the pump outlet hose.
- Replace the rear belly pan.
- Move the rotor latch (10) to the UNLOCKED position.
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| Illustration 7 | g01181305 |