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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 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. |
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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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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 | 1 |
| C (1) | 198-4239 | Pressure Sensor Gp (0 TO 41,369-KPA (0 TO 6,000-PSI)) | 1 |
| D | 348-5430 | Multi-Tool Gp | 1 |
| ( 1 ) | Tool (A), (B), and (C) are part of 198-4240 Digital Pressure Indicator Gp |
- 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 |
- 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 |
- Assemble the tooling. Connect Tool (C) to Tool (B) .
- Connect Tool (B) to Tool (A) .
- Connect Tool (C) to steering pressure port (8) .
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| Illustration 6 | g03171181 |
- 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 (D). Operate the machine until the oil temperature reaches 43 ± 5.6° C (110±10° F).
- With the machine at high idle, turn the steering wheel against the stop to one side.
- Read pressure on Tool (A). The pressure should be 15500 ± 700 kPa (2250 ± 100 psi).
- Use throttle control switch (3) in order to operate the engine in low idle.
- Move engine start switch (4) to the OFF position.
- If the pressure is outside the specified range, loosen locknut (9) on the steering relief valve. In order to increase pressure, rotate adjustment screw (10) clockwise. In order to decrease pressure, rotate adjustment screw (10) counterclockwise. Hold adjustment screw (10) in place, and tighten locknut (9). Go to Step 11 and retest the steering pressure. If the pressure is within specification, go to Step 19.
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| Illustration 7 | g03171187 |
- Remove the tooling from steering pressure port (8) .
- Remove and secure support bar (7). Close engine hood (6) .