568 Forest Machine Hydraulic System Cylinder Drift - Check - Empty Bucket Caterpillar


Cylinder Drift - Check - Empty Bucket
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1.1. Introduction
2.1. Required Tools
3.1. Test Procedure - 568 GF
4.2. Boom Cylinder Head End, Stick Cylinder Rod End, and Bucket Cylinder Head End
5.2. Stick Cylinder Head End
6.2. Bucket Cylinder Rod End
7.1. Test Procedure - 568 LL
8.1. 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

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

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

  1. Fully extend the bucket cylinder.

  2. Fully retract the stick cylinder.

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


    Illustration 2g01402004

  4. Raise the boom until the stick to bucket pin is the same height as the boom foot pin. Refer to Illustration 2.

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

  6. Stop the engine.

  7. Leave the machine in this position for 5 minutes. Measure the length of each cylinder 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.


    Illustration 3g01401745

  5. Raise the boom until the stick to bucket pin is 600.0 mm (23.6 inch) high from ground level. Refer to Illustration 3.

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

  7. Stop the engine.

  8. Leave the machine in this position for 5 minutes. Measure the length of the stick cylinder 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.


    Illustration 4g01401747

  4. Raise the boom until the stick to bucket pin is 600.0 mm ( 23.6 inch) high from ground level. Refer to Illustration 4.

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

  6. Stop the engine.

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

Test Procedure - 568 LL



    Illustration 5g01708035

  1. Position the machine on level ground. Refer to Illustration 5.

  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 5.

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

  7. Stop the engine.

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

Worksheet

Table 2
"Cylinder Drift - Check (Empty Bucket)" 
Date  Machine Serial Number 
Sales Model  Item  Cylinder Position  Cylinder Drift mm (inch)  Actual 
568 GF  Boom Cylinder  Extended  4.5 mm (0.18 inch) or less   
Stick Cylinder Retracted  10.0 mm (0.39 inch) or less   
Extended 25.0 mm (0.98 inch) or less  
Bucket Cylinder Extended  10.0 mm (0.39 inch) or less   
Retracted 20.0 mm (0.79 inch) or less   
568 LL  Boom Cylinder  Extended  4.5 mm (0.18 inch) or less   
Stick Cylinder Retracted  N/A   
Extended 10.0 mm (0.39 inch) or less   
Heel Cylinder Extended  N/A   
Retracted 10.0 mm (0.39 inch) or less   

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