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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. Dispose of all fluids according to local regulations and mandates. |
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Description | Qty |
| A | 8T-0855 | Pressure Gauge ( 0 to 4000 kPa (0 to 580 psi)) |
2 |
| B | 6V-4144 | Quick Connect Coupler | 2 |
| C | 6V-3965 | Fitting As | 2 |
| D | 3J-1907 | O-Ring Seal | 2 |
- Drive the machine to a smooth, horizontal surface.
- Move propulsion lever (2) to the NEUTRAL position.
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| Illustration 1 | g01202901 |
- Rotate speed dial (3) to the MINIMUM position.
- Move parking brake switch (4) to the ON position.
- Move screed lower switch (6) to the DOWN position. Lower the screed to the ground.
- Move throttle control switch (5) to the LOW IDLE position. Hold the switch in this position for less than 1 second.
- After the engine reaches low idle, move engine start switch (1) to the OFF position.
- Move key switch (7) to the OFF position.
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| Illustration 2 | g01203038 |
- Open the pump compartment on the left side of the machine.
- Remove the plug from "M4" port (8). Remove the plug from "M5" port (9) .
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| Illustration 3 | g01203039 |
- Install Tool (C) and Tool (D) in "M4" port (8). Install a second set of these tools in "M5" port (9) .
- Install Tool (B) onto Tool (A). Install a second Tool (B) onto a second Tool (A). Connect Tool (A) to "M4" port (8). Connect the second Tool (A) to "M5" port (9) .
- Disconnect the reverse EDC (10). The connector is located at the end of the short wires which extend from the EDC. Mark the connector for identification.
Note: The A332-YL wire and the 202-BK wire are connected to the reverse EDC for the left propulsion pump. The A333-PK wire and the 202-BK wire are connected to the reverse EDCfor the right propulsion pump. Disconnecting the EDC will cause a fault to appear in the monitoring system when the machine is started. After this procedure is completed, the fault must be cleared from the monitoring system.
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| Illustration 4 | g01203046 |
- Disconnect the forward EDC (11). Mark the connector for identification.
Note: The 335-BR wire and the 202-BK wire are connected to the forward EDC connector for the left propulsion pump. The 336-GY wire and the 202-BK wire are connected to the forward EDC connector for the right propulsion pump. Disconnecting the EDC connector will cause a fault to appear in the monitoring system when the machine is started. After this procedure is completed, the fault must be cleared from the monitoring system.
- Move key switch (7) to the ON position. Move engine start switch (1) to the START position. Release the engine start switch when the engine starts.
- Move throttle control switch (5) to the HIGH IDLE position. Hold the switch in this position for less than 1 second. The engine speed will increase to 2310 rpm.
- Read the pressure at "M4" port (8). Read the pressure at "M5" port (9). The pressure readings should be equal. If the pressure readings are equal, go to Step 21. If the pressure readings are not equal, go to Step 18.
- Loosen locknut (12) on the pump adjustment mechanism. Turn adjustment screw (13) until the pressure at "M4" port (8) starts to increase over the pressure at "M5" port (9). Record the pressure at the "M4" port. Note the angular position of the wrench.
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| Illustration 5 | g01203047 |
- Rotate adjustment screw (13) in the opposite direction until the pressure at "M5" port (9) is equal to the pressure which was recorded during Step 18. Note the angular position of the wrench.
- Rotate adjustment screw (13) to the center of the two positions which were noted in Step 18 and Step 19. Hold the adjustment screw in place. Tighten locknut (12). Go to Step 17.
- Perform the following steps:
- Move throttle control switch (5) to the LOW IDLE position. Hold the switch in this position for less than 1 second.
- After the engine reaches low idle, move engine start switch (1) to the OFF position.
- Move key switch (7) to the OFF position.
- Allow the oil to cool.
- Remove the tooling.
- Reconnect reverse EDC (10) .
- Reconnect forward EDC (11) .
- If an adjustment was made, recalibrate the initial current setting to the electronic control module (ECM) for the pump. Refer to Troubleshooting Manual, KENR5036, "Electrical and Hydraulic Systems" for the calibration procedure.