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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 product. 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 on Caterpillar products. 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 | 1 | |
| B | 198-4238 | Pressure Sensor Gp | 1 |
| C | 6V-9839 | Swivel Tee | 1 |
| D | 6V-9832 | Cap As | 1 |
| E | 6V-9746 | O-Ring Seal | 2 |
| F | 208-1356 | Vacuum Pump | 1 |
| ( 1 ) | The 198-4234 Pressure Gauge Tool Gp, and the 198-4236 Adapter Cable As are part of the 198-4240 Digital Pressure Indicator . |
| Optional Tools (1) | |||
|---|---|---|---|
| Tool | Part Number |
Description | Qty |
| G | 8T-0858 | Pressure Gauge 0 to 16000 kPa (0 to 2320 psi) |
1 |
| H | 6V-3989 | Fitting | 1 |
| J | 6V-4143 | Quick Connect Coupler | 2 |
| K | 177-7860 | Hose As | 1 |
| ( 1 ) | The optional tools can be used in place of the digital pressure measurement tools which are specified in the required tool list. |
- Park the machine on a smooth, horizontal surface.
- Move propulsion lever (1) to the NEUTRAL position.
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| Illustration 1 | g01171253 |
- Move parking brake switch (2) to the ON position.
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| Illustration 2 | g01179189 |
- Move cab position switch (3) to the RIGHT position. Release the switch when the operator's station reaches the right side of the machine.
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| Illustration 3 | g01179058 |
- Stop the engine.
- Remove the cover from the front auxiliary manifold.
- Connect Tool (B) to port "TP1" (4) of the front auxiliary manifold. Connect Tool (B) to Tool (A) .
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| Illustration 4 | g01181148 |
- Use Tool (F) to create a vacuum in the hydraulic tank.
- Disconnect hose (8) from Tee (6). Install Tool (C) and connect the hose.
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| Illustration 5 | g01181154 |
- Disconnect hose (7) from port "P" (5) on the rear auxiliary manifold. Cap the port. Connect hose (7) to the open port on Tool (C) .
- Start the engine. Operate the engine at LOW IDLE.
Note: Perform this test with cold oil when the engine is operating at the LOW IDLE position.
- Read the pressure at port "TP1" (4). The pressure should be 12420 ± 690 kPa (1800 ± 100 psi).
- If the pressure is outside the specified range, stop the engine. Then, adjust the pressure with the following procedure. If the pressure is within the specified range, go to Step 16.
- Loosen locknut (9) on the sequence valve. In order to increase the pressure, rotate adjustment screw (10) clockwise. In order to decrease pressure, rotate the adjustment screw counterclockwise.
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| Illustration 6 | g01181221 |
- Hold adjustment screw (10) in place, and tighten locknut (9) .
- Stop the engine. Remove the tooling.