CP-563D, CS-563D, CS-573D and CS-583D Vibratory Compactors Propel System Caterpillar

The oil in the system must be SAE 10W hydraulic oil. The oil temperature must be at 38°C (100°F) in order to get correct results. All speed tests are made with the engine rpm at maximum rpm.

Time the machine in forward and reverse through a 30.5 m (100 ft) timing trap. The vibration system must be off.

Note: The machine must be at top speed through the entire timing trap.

The circuit operation is normal if the travel speeds match the speeds on the following chart. The relief valves for both the charge circuit and the propel circuit must be tested in order to be sure that the opening pressures are correct.

Times for forward and reverse through the 30.5 m (100 ft) timing trap must match within one second.

Check the following parameters if the travel speed is not correct.

1. Pump efficiency.

2. Charge relief valve setting.

3. Check the main relief valve setting.

4. Make sure that the machine is in the HIGH SPEED range.

5. Make sure that the linkage rod between the propel pumps is adjusted correctly.

6. Check the axle propel motor for the correct minimum displacement adjustment.