 |
Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin. |
 |
| NOTICE |
|---|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. 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 on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
The hydraulic systems on these machines use hydraulic oil from the hydraulic tank. Caterpillar recommends the use of the S·O·S oil analysis program in order to monitor the condition of your equipment. Refer to the Operation and Maintenance Manual, "S·O·S Fluid Analysis" for further information about this program.
If the oil becomes contaminated, premature component failure could result. Contaminated oil can also contribute to overheating. Use the following procedure to sample the oil in the system.
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 1U-5719 | Vacuum Pump | 1 |
| 4C-4056 | Tube | 1 | |
| 169-7373 | Bottle | 1 | |
- Shift the transmission to NEUTRAL and engage the parking brake.
- Start the engine.
- Extend the boom and retract the boom several times in order to warm the hydraulic oil.
- Operate each implement several times in order to circulate the warm oil. Rotate the steering wheel from stop to stop several times.
- Turn the start switch to OFF.
- Remove the hydraulic filler cap. The cap is installed on the upper hydraulic tank. The tank is located on the right side of the engine enclosure.
 | |
| Illustration 1 | g00922864 |
- Draw a 50 mL (1.7 fl oz) oil sample from the hydraulic system. The level of contaminants must be lower than the values in ISO 18/15. Oil samples can be obtained through the filler cap on the hydraulic tank. Use Tooling (A) in order to obtain a sample.
| Hydraulic Oil Contamination | |
| Particle Size (Microns) | Maximum Number of Particles in a 50 mL (1.7 fl oz) sample |
| 10 to 20 | 48000 |
| 21 to 50 | 2580 |
| 51 to 100 | 150 |
| 100 or more | 20 |
If the hydraulic oil exceeds the specified amount of particles, remove the hydraulic filter. Cut the filter open and inspect the filter for particles. A magnet will separate ferrous particles from nonferrous particles. Nonferrous particles could include O-ring seals and gaskets. Consult your Caterpillar dealer for further instruction.