302.5C Mini Hydraulic Excavator Hydraulic System Caterpillar

Note: When the procedure for Testing and Adjusting, "Travel on Level Ground - Test" cannot be performed, this test may be used as a substitute.

Note: The engine speed and/or the machine configuration that is used during this test can affect the results of this test. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for the engine speed that was used for this test.

Note: The relief valve pressure settings must be set to the relief valve pressure specification before performing this operational check. Refer to Testing and Adjusting, "Specifications".

Table 1

Required Tools
Description	Qty
Stopwatch	1

Illustration 1	g00696620
Machine (typical example)

1. Start the engine.

2. Position the machine on level ground.

3. Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).

4. Raise a track off the ground. Refer to Illustration 1.

5. Put a mark on a shoe of the raised track.

6. Place the travel speed control switch in HIGH position.

7. Move the travel lever of the raised track to full travel position.

8. Measure the time that is required for the raised track to make three complete revolutions. Measure the time that is required in each direction.

9. Place the travel speed control switch in the LOW position and repeat Steps 7 through 8.

Table 2

Track Speed
Travel Mode (Forward and Reverse)	Time that is required to rotate the rubber track for 3 revolutions	The difference in time between the right track and the left track
High	9.7 ± 1.5 sec	0.08
Low	15.7 ± 1.5 sec	0.14