305 CR Mini Hydraulic Excavator Hydraulic System Cylinder Drift - Check 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" 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".

Test Procedure for Boom, Stick, and Bucket Cylinders

Illustration 1	g00816216

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

2. Load the bucket.

   Weight of bucket load ... 210 kg (465 lb)

3. Fully extend the bucket cylinder.

4. Fully retract the stick cylinder.

5. Raise or lower the boom until the top stick pin is the same height as the boom foot pin.

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

7. Stop the engine.

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

Test Procedure for Blade Cylinder

Illustration 2	g00816222

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

2. Position the stick so that the stick is perpendicular to the ground. Lower the stick to the ground.

3. Fully retract the blade cylinder.

4. Measure the blade cylinder's length from cylinder pin to cylinder pin.

5. Stop the engine.

6. Leave the machine in this position for three minutes. Measure the blade cylinder's length from cylinder pin to cylinder pin for drift.