325D Forest Machine Hydraulic System Caterpillar

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. Refer to Testing and Adjusting, "Operational Checks" for the machine configurations that were 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
Measuring Tape	1
Stopwatch	1

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Illustration 1	g01708035

1. Position the machine on level ground. Refer to Illustration 1.

2. Fully extend the heel cylinder.

3. Fully retract the stick cylinder.

4. Retract the stick cylinder rod 70 mm (2.8 inch) from the fully extended position.

5. Raise the boom until the stick to heel pin is the same height as the boom foot pin. Refer to Illustration 1.

6. Measure each cylinder's length from cylinder pin to cylinder pin.

7. Stop the engine.

8. Leave the machine in this position for five minutes. Measure each cylinder's length from cylinder pin to cylinder pin for drift.

9. Refer to Table 2 for the specifications for cylinder drift.
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   Table 2

   Cylinder Drift
   Item	Specification
   Boom Cylinder	4.5 mm (0.18 inch) or less
   Stick Cylinder	10 mm (0.39 inch) or less
   Heel Cylinder	10 mm (0.39 inch) or less