Hydraulic Oil Contamination - Test
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| 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. |
Use the following procedure to sample the oil in the hydraulic system.
Note: If the oil becomes contaminated, premature component failure could result. Contaminated oil can also contribute to overheating.
- Start the engine and run the engine at high idle.
- Actuate all hydraulic cylinders through a minimum of 10 full cycles.
- Install a jumper line between the auxiliary lines and cycle the auxiliary flow for one minute.
- Lower the work tool to the ground.
- Allow the engine to run at low idle.
Note: Do not operate the hydraulic controls.
- Open the engine access door.
- Draw a 50 mL (1.7 fl oz) oil sample through the sampling valve. The concentration of contaminants must be lower than the values in the following table.
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Table 1 Hydraulic Oil Contamination Particle Size (Microns) Maximum Number of Particles in a 50 mL Sample >5 125000 >15 16000
- If the concentration of contaminants are higher than the values in the table, refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change" for further information.
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