307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavator Machine System Caterpillar

Specification

References

Note: The engine speed and/or the machine configuration that is used during this test can affect the results of this test.

Reference: Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for the engine speed that was used for this test.

Reference: Testing and Adjusting, "Operational Checks" for the machine configurations that were used for this test.

The relief valve pressure settings must be set to the relief valve pressure specification before performing this operational check.

Reference: Testing and Adjusting, "Specifications".

Introduction

Measuring the amount of drift of the machine on a slope will determine if there is a need to check the travel brake.

Required Tools

Test Preparation

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Illustration 1	g06365047
(A) 12 degrees

1. Place the machine on a slope of 12 degrees. Refer to Illustration 1.

2. The surface must be hard.
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   Illustration 2	g06278080
   (A) Mark on roller frame (B) Mark on track

3. To indicate the relative position of the machine to the slope, put a mark on both the roller frame and the track.

1. Ensure that bucket is empty.

Test Procedure

1. Start the engine.

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

1. Position the implements, as shown. Refer to Illustration 1.

2. Fully extend the stick cylinder and the bucket cylinder.

3. Stop the engine.

4. Measure the machine movement on the slope after 3 minutes.

5. Refer to Table 1 for specification.