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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. |
| 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. |
| Machine Test Parameters | ||
|---|---|---|
| Date | Product or Component SN | |
| Measurement Location | Measurement | Actual |
| Hydraulic oil temperature for test | |
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| Illustration 1 | g03842372 |
| Test Specifications | ||
|---|---|---|
| Date | Product or Component SN | |
| Test | Rates | Actual |
| Target Steering relief pressure. | |
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| Torque for locknut (12) on the steering relief valve. | |
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This procedure provides a method to determine if the steering relief valve is set to the correct operating pressure. Perform this test if the steering is erratic or unresponsive.
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| Illustration 2 | g02571852 |
| Required Tools | ||||
|---|---|---|---|---|
| Tool | Item | Qty | Part No | Description |
| A | 198-4240 | Digital Pressure Indicator Gp | ||
| A1 | 1 | 198-4234 | Digital Indicator | |
| A2 | 1 | 198-4239 | Pressure Sensor Gp
(0 to 41368 kPa (0 to 6000 psi)) |
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| A3 | 1 | 198-4236 | Adapter Cable As | |
- Connect Tool (A2) to each Tool (A3).
- Connect Tool (A3) to Tool (A1).
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| Illustration 3 | g03850826 |
| Optional Tools(1) | ||||
|---|---|---|---|---|
| Tool | Item | Qty | Part No | Description |
| B | B1 | 4 | 8T-0859 | Pressure Gauges
(0 - 25000 kPa (0 - 3600 psi)) |
| B2 | 4 | 6V-4144 | Quick Connect Couplers | |
| C | C1 | 4 | 6V-4142 | Fittings |
| C2 | 4 | 177-7860 | Hose As | |
| C3 | 4 | 6V-4143 | Quick Connect Couplers | |
| (1) | The optional tools can be used to replace the digital pressure gauges in the required tool list. |
- Connect one Tool (B) to each Tool (C).
- Drive the machine to a smooth, horizontal surface.
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Illustration 4 g03831037 - Move propel lever (1) to the NEUTRAL position.
- Move parking brake switch (2) to the ON position.
- Use throttle control switch (3) in order to operate the engine in ECO mode or in low idle.
Note: Two things indicate when the engine is in ECO mode. First, "ECO" will appear on the display. Second, the second LED next to throttle control switch (3) will be illuminated. Two things indicate when the engine is at low idle. First, "Low Idle" will appear on the display. Second, the first LED next to the throttle control switch will be illuminated.
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Illustration 5 g03831049 - Move engine start switch (4) to the OFF position.
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Illustration 6 g03831079 - Unlock latch (5) and open engine compartment door (6) on the right side of the machine.
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Illustration 7 g03842305 - Connect Tool (A2) to port "G" (8) on steering manifold (7).
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Illustration 8 g03842323 - Place steer lock (9) in the locked position.
- 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 in high idle.
Note: Two things indicate when the engine is at high idle. First, "High Idle" will appear on the display. Second, all three LED's next to throttle control switch (3) will be illuminated.
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Illustration 9 g03842327 - Monitor the hydraulic oil temperature on operator display (10). Operate the machine until the oil temperature reaches
43 ° ± 5.6 °C (110 ° ± 10 °F) . - Move parking brake switch (2) to the OFF position.
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Illustration 10 g03842338 - Rotate steering wheel (11). Hold the steering wheel and record pressure on Tool (A). The pressure should be
23000 ± 1000 kPa (3336 ± 145 psi) . - Return steering wheel (11) to the straight travel position.
- Move parking brake switch (2) to the ON position.
- Use throttle control switch (3) in order to operate the engine in ECO mode or in low idle.
Note: Two things indicate when the engine is in ECO mode. First, "ECO" will appear on the display. Second, the second LED next to throttle control switch (3) will be illuminated. Two things indicate when the engine is at low idle. First,"Low Idle" will appear on the display. Second, the first LED next to the throttle control switch will be illuminated.
- Move engine start switch (4) to the OFF position.
- If the pressure is inside the specified range, go to Step 11. If the pressure is outside the specified range, perform the "Adjustment Procedure".
- Remove Tool (A2) from port "G" (8) on steering manifold (7).
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Illustration 11 g03842353 - Place steer lock (9) in the unlocked position.
- Close engine compartment door (6) on the right side of machine and secure latch (5).
- Loosen locknut (12) on the steering relief valve.
- In order to increase the pressure, turn adjustment screw (13) clockwise. In order to decrease the pressure, turn the adjustment screw counterclockwise.
- Hold adjustment screw (13), and tighten locknut (12) to a torque of
14 N·m (10 lb ft) to16 N·m (12 lb ft) . - Perform the test procedure.
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| Illustration 12 | g03842372 |