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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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| 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. |
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Description | Qty |
| A (1) | 198-4234 | Digital Indicator | 1 |
| B (1) | 198-4236 | Adapter Cable As | 1 |
| C (1) | 198-4239 | Pressure Sensor Gp 0-41300 kPa (0-6000 psi) | 1 |
| D | 6V-9830 | Cap As | 1 |
| E | 6V-9509 | Plug | 1 |
| 6V-8398 | O-Ring Seal | ||
| F | 173-2464 | Cap | 1 |
| G | 348-5430 | Multi-Tool Gp | 1 |
| ( 1 ) | Tool (A) , Tool (B) , and Tool (C) are part of the 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 | g03334022 |
- Move parking brake switch (2) to the ON position.
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| Illustration 2 | g03334023 |
- Use throttle switch (3) in order to operate the engine in low idle.
- Move engine start switch (4) to the OFF position.
- Unhook latches (5) on each side of the machine, and open engine hood (6) .
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| Illustration 3 | g03334024 |
- Assemble the tooling. Connect Tool (B) to Tool (C) . Connect Tool (B) to Tool (A) .
- Connect Tool (C) to pressure tap (7) on vibratory valve (8) .
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| Illustration 4 | g03334025 |
- Disconnect hose assembly (10) from the run of tee on vibratory valve (8) . Use Tool (D) to cap run of tee (9) . Use Tool (E) to plug the hose assembly.
Note: Hose assembly (10) is the line to the fan motor.
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| Illustration 5 | g03334027 |
- 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.
- Monitor the hydraulic oil temperature with Tool (G) . Operate the machine until the oil temperature reaches a minimum of 50° C (122° F).
- Read pressure on Tool (A) . The vibratory relief pressure should be 26200 ± 689 kPa (3800 ± 100 psi).
- Move engine start switch (4) to the OFF position.
- If the pressure setting is within the specified range, go to Step 20. If the pressure setting is not within the specified range, go to Step 16.
- Hold adjustment screw (11) in place and loosen locknut (12) on vibratory valve (8) .
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| Illustration 6 | g03334029 |
- In order to increase pressure, rotate adjustment screw (11) clockwise. In order to decrease pressure, rotate adjustment screw (11) counterclockwise.
Note: One quarter turn of adjustment screw (11) changes the pressure by approximately 1500 kPa (218 psi).
- Hold adjustment screw (11) in place and tighten locknut (12) .
- Go to Step 10 and check the vibratory relief pressure.
- Remove tooling from vibratory valve (8) .
- Connect inlet hose assembly (10) to inlet port (9) on vibratory valve (8) .
- Close engine hood (6) and secure latches (5) .