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Diesel engine exhaust contains products of combustion which may cause personal injury. Always start and operate the engine in a well ventilated area, and, if in an enclosed area, vent the exhaust to the outside. |
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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 rotating and moving parts. Moving fan blades and moving parts will throw or cut any object or tool that falls or is pushed into them. Make sure no one is working on, underneath or close to an engine that is running. Make sure the area is free of personnel. |
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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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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 No | Description | Qty |
| A (1) | 198-4234 | Digital Indicator (PRESSURE) | 1 |
| B (1) | 198-4236 | Adapter Cable As | 2 |
| C (1) | 251-9600 | Pressure Sensor Gp (0 TO 68,900-KPA (0 TO 10,000-PSI)) | 2 |
| D (1) | 198-4237 | Pressure Sensor Gp (0 TO 3,445-KPA (0 TO 500-PSI)) | 2 |
| E | 145-8813 | Hydraulic Fitting Gp (QUICK DISCONNECT, MALE) | 2 |
| F | 187-3547 | Quick Disconnect Coupler As | 2 |
| G | 177-7860 | Hose As (3-M) | 1 |
| 6V-4142 | Fitting (TEST) | 2 | |
| 6V-4143 | Quick Connect Coupler (FLUID SAMPLING) | 2 | |
| H | 348-5430 | Multi-Tool Gp | 1 |
| ( 1 ) | Tool (A), (B), and (C) are part of 198-4240 Digital Pressure Indicator Gp |
Note: Verify that the charge relief valve is within specification prior to performing this procedure. Refer to Systems Operation, Testing and Adjusting,, " "Relief Valve (Charge) Test and Adjust"".
- Drive the machine to a smooth, horizontal surface.
- Move propel lever (1) to the NEUTRAL position.
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| Illustration 1 | g03148936 |
- Move parking brake switch (2) to the ON position.
- Use throttle control switch (3) in order to operate the engine in low idle.
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| Illustration 2 | g03148937 |
- Move engine start switch (4) to the OFF position.
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| Illustration 3 | g03148938 |
- Block the wheels with appropriate devices.
- Unlock latches (5) and open engine hood (6) .
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| Illustration 4 | g03148939 |
- Raise support bar (7) and secure the engine hood.
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| Illustration 5 | g03148940 |
- Loosen set screw (9) on needle valve (8) for the parking brakes.
Note: Needle valve (8) is located in the engine compartment, on the right side of the machine.
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| Illustration 6 | g03149696 |
- Rotate needle valve (8) clockwise in order to close the valve. Tighten set screw (9) .
- Assemble Tool (G) .
- Remove the plug from port "X1" (11) of the propel pump. Install Tool (E) in the "X1" port.
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| Illustration 7 | g03159016 |
- Remove the plug from port "X2" (10) of the propel pump. Install Tool (E) in the "X2" port.
- Connect one end of Tool (G) to Tool (E) in port "X1" (11). Connect other end of Tool (G) to Tool (E) in port "X2" (10)
- Assemble the tooling. Connect Tool (C) to Tool (B). Make two sets of Tool (C) and Tool (B). Connect both sets of Tool (B) to Tool (A) .
- Connect one Tool (C) to forward pressure tap "Ma" (13) on the propel pump. Connect other Tool (C) to reverse pressure tap "Mb" (12) on the propel pump.
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| Illustration 8 | g03159021 |
- 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. Use throttle control switch (3) in order to operate the engine at 2250 rpm (high idle).
- Monitor the hydraulic oil temperature with Tool (H). Operate the machine until the oil temperature reaches 43 ± 5.6° C (110 ± 10° F).
- Compare the pressure readings at forward pressure tap "Ma" (13) and reverse pressure tap "Mb" (12). The pressure readings should be equal.
Note: The pressure should be approximately 2500 kPa (360 psi).
- If the pressure is equal, go to Step 25. If the pressure is not equal, hold adjustment screw (15) and loosen locknut (14). If the pressure at forward pressure tap (13) is greater than the pressure at reverse pressure tap (12), rotate adjustment screw (15) counterclockwise. If the pressure in forward pressure tap (13) is less than the pressure in reverse pressure tap (12), rotate adjustment screw (15) clockwise.
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| Illustration 9 | g03159023 |
- When the pressure is equal, hold pump neutral adjustment screw (15), and tighten locknut (14) .
- Use throttle control switch (3) in order to operate the engine at low idle.
- Move engine start switch (4) to the OFF position.
- Remove Tool (C) from forward pressure tap "Ma" (13). Disconnect Tool (C) from Tool (B). Connect Tool (D) to Tool (B). Install Tool (D) on forward pressure tap "Ma" (13) .
- Remove Tool (C) from reverse pressure tap "Mb" (12). Disconnect Tool (C) from Tool (B). Connect Tool (D) to Tool (B). Install Tool (D) on reverse pressure tap "Mb" (12) .
- 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. Use throttle control switch (3) in order to operate the engine at 2250 rpm (high idle).
- Compare the pressure readings at port "Ma" (13) and port "Mb" (12). The pressure readings should be equal. If the pressure is not equal, go to Step 30. If the pressure is equal, go to Step 31.
Note: The pressure should be approximately 2500 kPa (360 psi).
- If the pressure is not equal, loosen the locknut and adjust the pressure using pump neutral adjustment screw (15). If the pressure at port "Ma" (13) is greater than the pressure at port "Mb" (12), rotate the adjustment screw counterclockwise. If the pressure at the "Ma" port (13) is less than the pressure in the "Mb" port (12), rotate adjustment screw (15) clockwise. Repeat Step 29.
- Use throttle control switch (3) in order to operate the engine at low idle.
- Move engine start switch (4) to the OFF position.
- Remove the tooling from the "X1" port. Remove the tooling from the "X2" port. Replace the plugs.
- Remove the tooling from port "Mb" (12) and port "Ma" (13) .
- Remove and secure support bar (7). Close engine hood (6) .