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Sudden movement of the machine or release of oil under pressure can cause serious injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the hydraulic system. |
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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 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. |
Note: Perform the following steps before conducting this procedure:
- Park the machine on a flat, level surface.
- Place the propel control lever in NEUTRAL.
- Engage the parking brake.
- Stop the engine.
- Start the engine. Operate the engine at 2250 rpm (high idle).
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Illustration 1 g01081130 - Ensure that the tires are inflated to approximately
345 kPa (50 psi) .Note: If necessary, move switch (2) for the compressor to ON, and move switch (3) for tire inflation to INFLATE. Release the switch for tire inflation when the tires are inflated to
345 kPa (50 psi) . If the tires are inflated to a pressure that is greater than345 kPa (50 psi) , more time will be needed to complete the test. - Move switch (3) for tire inflation to DEFLATE.
- Watch the pressure on gauge (1). The pressure should slowly decrease to
240 ± 34 kPa (35 ± 5 psi) . At this time, the pressure will quickly decrease to0 kPa (0 psi) . - If the pressure continues to steadily drop below
240 ± 34 kPa (35 ± 5 psi) , one or more valves is faulty. - Reinflate the tires to the desired pressure. Stop the engine.
