 |
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. |
 |
|
Personal injury or death can result from improperly checking for a leak. Always use a board or cardboard when checking for a leak. Escaping air or fluid under pressure, even a pin-hole size leak, can penetrate body tissue causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. |
|
|
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 |
|---|
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. |
Introduction
Contamination of the hydraulic oil could cause premature component failure. This procedure provides a method to determine if there is hydraulic system contamination.
Required Tools
| Required Tools | ||||
|---|---|---|---|---|
| Tool | Item | Qty | Part No | Description |
| A | 1 | 169-8373 | Fluid Sampling Bottle | |
Test Preparation
- Drive the machine to a smooth, horizontal surface.
- Move propulsion lever (1) to the NEUTRAL position.
 | |
| Illustration 1 | g03749808 |
- Move parking brake switch (4) to the ON position.
- Move throttle control switch (5) to the LOW-IDLE position.
Note: The engine rpm will appear on machine display (2) .
- If the machine is equipped with a leveling blade, use blade control lever (3) to lower the blade to the ground.
- Unhook latch (6) and open right engine panel (7) .
 | |
| Illustration 2 | g03749908 |
- Secure right engine panel (7) with prop (8) .
 | |
| Illustration 3 | g03749910 |
Test Procedure
- Remove cap (9). Obtain an oil sample from the S·O·S tap. Refer to Special Instruction, SEBU6250, "S·O·S Oil Analysis" for information about obtaining a sample of the hydraulic oil. Replace the cap.
 | |
| Illustration 4 | g03749912 |
- Allow the engine to cool for 5 minutes. Move engine start switch (10) to the OFF position.
 | |
| Illustration 5 | g03749935 |
- Check hydraulic filter element (11) for foreign materials.
- Bronze-colored particles indicate pump or motor piston slipper failure or port plate wear due to contamination.
- Shiny steel particles indicate pump failure or motor piston failure.
- Rubber particles indicate a seal failure or a hose failure.
- Aluminum particles indicate vibratory motor failure.
Note: If any of these particles are found in a hydraulic filter element, all components of the hydraulic oil system must be cleaned. Do not use any damaged parts. Any damaged parts must be removed, and new parts must be installed.
 | |
| Illustration 6 | g03749938 |
- Replace hydraulic filter element (11) .