538 Forest Machine Machine Systems Cylinder Drift - Check - Empty Bucket Caterpillar


Cylinder Drift - Check - Empty Bucket
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1.1. Specification
2.1. Introduction
3.1. Required Tools
4.1. Test Procedure
5.2. Boom Cylinder Head End, Stick Cylinder Rod End, and Bucket Cylinder Head End
6.2. Stick Cylinder Head End
7.2. Bucket Cylinder Rod End

Specification

Table 1
"Cylinder Drift - Check (Empty Bucket)" 
Item  Cylinder Position  538 GF  538 LL  Actual 
Boom Cylinder  Extended  4.5 mm (0.18 inch) or less  4.5 mm (0.18 inch) or less   
Stick Cylinder  Retracted  10 mm (0.39 inch) or less  10 mm (0.39 inch) or less   
Extended 25 mm (0.98 inch) or less  25 mm (0.98 inch) or less   
Heel Cylinder  Extended  20 mm (0.79 inch) or less   
Retracted 10 mm (0.39 inch) or less   

Introduction

The performance level of the cylinder and the cylinder seals for the implements can be determined with the following procedure.

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".

Note: Work tools must be removed for this test.

Required Tools

Table 2
Description  Qty 
Measuring Tape 
Stopwatch 

Test Procedure



Illustration 1g01803815

Boom Cylinder Head End, Stick Cylinder Rod End, and Bucket Cylinder Head End

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

  2. Fully extend the bucket cylinder.

  3. Fully retract the stick cylinder.

  4. Extend the stick cylinder rod 70 mm (2.8 inch) from the fully retracted position.

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

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

  7. Stop the engine.

  8. Leave the machine in this position for 5 minutes. Measure each cylinder length from cylinder pin to cylinder pin for drift.

Stick Cylinder Head End

  1. Start the engine.

  2. Fully extend the bucket cylinder.

  3. Fully extend the stick cylinder.

  4. Retract the stick cylinder rod 60 mm (2.4 inch) from the fully extended position.

  5. Raise the boom until the stick to bucket pin is 600 mm (23.6 inch) high from ground level.

  6. Measure the stick cylinder length from cylinder pin to cylinder pin.

  7. Stop the engine.

  8. Leave the machine in this position for 5 minutes. Measure the stick cylinder length from cylinder pin to cylinder pin for drift.

Bucket Cylinder Rod End

  1. Start the engine.

  2. Fully retract the bucket cylinder.

  3. Fully retract the stick cylinder.

  4. Raise the boom until the stick to bucket pin is 600 mm (23.6 inch) high from ground level.

  5. Measure the bucket cylinder length from cylinder pin to cylinder pin.

  6. Stop the engine.

  7. Leave the machine in this position for 5 minutes. Measure the bucket cylinder length from cylinder pin to cylinder pin for drift.

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