216, 226, 232 and 242 Skid Steer Loaders Machine Systems Caterpillar

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.

1. Start the engine and run the engine at high idle.

2. Actuate all hydraulic cylinders through a minimum of 10 full cycles.

3. Install a jumper line between the auxiliary lines. Cycle the auxiliary flow for one minute.

4. Lower the work tool to the ground.

5. Allow the engine to run at low idle.

   Note: Do not operate the hydraulic controls.

6. Open the engine access door.

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Illustration 1	g00787957

Note: Remove any dirt or debris on the sampling valve.

7. Draw a 50 mL (1.7 fl oz) oil sample through the scheduled oil sampling valve. The level of the contaminants must be equal to the values in ISO 18/15 or lower than the values in ISO 18/15. The concentration of contaminants must be equal to the values in the following table or 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

8. If the concentration of contaminants are higher than the values in the table, flush the hydraulic system. Refer to Testing and Adjusting, "Filling and Flushing the Hydraulic System - Test" for the proper procedure.

9. If the concentration of contaminants continues to be higher than the values in the table, change the hydraulic oil. Refer to the Operation and Maintenance Manual, "Hydraulic System Oil - Change" for further information.