568 Forest Machine Hydraulic System Travel on Level Ground - Test - Optional Test Caterpillar


Travel on Level Ground - Test - Optional Test
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1.1. Introduction
2.1. Required Tools
3.1. Test Procedure - 568 GF
4.1. Test Procedure - 568 LL
5.1. Worksheet

Introduction

When the procedure for the Travel on Level Ground cannot be performed, this test may be used as a substitute.

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    
Stopwatch     1    

Test Procedure - 568 GF

  1. Start the engine.

  1. Position the machine on level ground.

  1. Increase the hydraulic oil temperature to 50° ± 10°C (122° ± 18°F).



    Illustration 1g00297292

  1. Raise a track off the ground. Refer to Illustration 1.

  1. Put a mark on a shoe of the raised track.

  1. Place the machine controls at the following settings: Engine speed dial "10" and AEC switch OFF.

  1. Place the travel speed control switch in HIGH position.

  1. Move the travel lever of the raised track to full travel position.

  1. Measure the time that is required for the raised track to make three complete revolutions. Measure the time that is required in each direction.

    Note: The difference in times between forward and reverse should not exceed 0.5 seconds for HIGH travel speed and 1.0 seconds for LOW travel speed.

  1. Place the travel speed control switch in the LOW position and repeat Steps 8 through 9.

Test Procedure - 568 LL




Illustration 2g01405214

  1. Start the engine.

  1. Position the machine on level ground.

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

  1. Raise a track off the ground. Refer to Illustration 2.

  1. Put a mark on a shoe of the raised track.

  1. Place the machine controls at the following settings: Engine speed dial "10" and AEC switch OFF.

  1. Place the travel speed control switch in HIGH position.

  1. Move the travel lever of the raised track to full travel position.

  1. Measure the time that is required for the raised track to make three complete revolutions. Measure the time that is required in each direction.

  1. Place the travel speed control switch in the LOW position and repeat Steps 8 through 9.

Worksheet

Table 2
"Travel on Level Ground - Test (Optional Test)"    
Date     Machine Serial Number    
Time For Three Revolutions (time in seconds)    
Undercarriage     Travel Speed     568 GF     568 LL     Actual    
Standard     HIGH     Forward     23.0 ± 1.5     23.0 ± 1.5        
Reverse
LOW Forward     37.0 ± 2.5     37.0 ± 2.5        
Reverse

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