568 Forest Machine Hydraulic System Cylinder Drift - Check - Loaded Bucket/Heel Caterpillar


Cylinder Drift - Check - Loaded Bucket/Heel
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1.1. Introduction
2.1. Required Tools
3.1. Test Procedure - 568 GF
4.1. Worksheet

Introduction

The performance level of the cylinder, the cylinder seals, and the overload relief valves 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".

Required Tools

Table 1
Required Tools 
Description  Qty 
Measuring Tape 
Stopwatch 

Test Procedure - 568 GF



Illustration 1g00298378

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

  2. Load the bucket.

  3. Raise the boom until the top stick pin is the same height as the boom foot pin.

  4. Fully extend the bucket cylinder.

  5. Fully retract the stick cylinder.

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

  7. Measure the length of each cylinder length from the cylinder pin to cylinder pin.

  8. Stop the engine.

  9. Leave the machine in this position for 3 minutes. Measure the length of each cylinder length from the cylinder pin to cylinder pin for drift.

Worksheet

Table 2
"Cylinder Drift - Check (Loaded Bucket / Heel)" 
Date  Machine Serial Number 
Sales Model  Item  Cylinder Drift mm (inch)  Actual 
568 GF  Boom Cylinder  4.5 mm (0.18 inch) or less   
Stick Cylinder 12.0 mm (0.47 inch) or less   
Bucket Cylinder 18.0 mm (0.71 inch) or less   
Sales Model  Item  Cylinder Drift mm (inch)  Actual 
568 LL  Boom Cylinder  N/A   
Stick Cylinder N/A   
Heel Cylinder N/A   

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