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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 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. |
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Description | Qty |
| A | 1U-5718 | Vacuum Pump | 1 |
| 169-7372 | Fluid Sampling Bottle | 1 | |
| 4C-4056 | Plastic Tube |
1 | |
If the oil becomes contaminated, premature component failure could result. Contaminated oil can also contribute to overheating.
Use the following procedure to determine the contamination of the oil in the hydraulic system.
- Drive the machine to a smooth, horizontal surface.
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Illustration 1 g03333904 - Move propel lever (1) to the NEUTRAL position.
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Illustration 2 g03333905 - Move parking brake switch (2) to the ON position.
- Use throttle switch (3) in order to operate the engine in low idle.
- Move engine start switch (4) to the OFF position.
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Illustration 3 g03333906 - Unhook latches (5) on each side of the machine, and open engine hood (6).
- Assemble Tool (A).
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Illustration 4 g03333908 - Remove hydraulic tank cap (7). Use Tool (A) in order to obtain an oil sample from the hydraulic tank.
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Illustration 5 g03333909 - Check hydraulic filter element (8) for foreign materials.
- Bronze colored particles give an indication of pump swashplate failure.
- Shiny steel particles give an indication of pump piston failure, propel motor gearbox failure, propel motor failure, and/or vibratory motor failure.
- Rubber particles indicate a seal failure or a hose failure.
- Aluminum particles give an indication of vibratory pump failure, vibratory motor failure, and/or propel motor failure.
Note: If any of these particles are found in the hydraulic filter element, all components of the hydraulic oil system must be cleaned. Do not use any damaged parts. Damaged parts must be removed, and new parts must be installed.
- Reinstall hydraulic tank cap (7).
- Close engine hood (6) and secure latches (5).
