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


Travel on Level Ground - 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

The performance level of the travel motors 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 1g00296317
    (A) Preliminary run 5 m (16.4 ft)
    (B) Travel distance 20 m (65.6 ft)
    (C) Bucket height 0.5 to 1 m (1.6 to 3.3 ft)

  1. Travel distance must be at least 25 m (82 ft) long. Travel test ground must be hard and as level as possible.

  2. Draw a 25 m (82 ft) straight line on travel test ground as a reference line.

  3. Start the engine.

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

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

  6. The bucket should be empty.

  7. Position the machine so that one track is parallel with the reference line. Position the machine for the travel test. Refer to Illustration 1.

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

  9. Move the machine by operating both travel levers at the same time.

  10. The first 5 m (16.4 ft) are for a preliminary run. Measure the travel time that is required to travel the remaining 20 m (65.6 ft). Measure the time that is required in each direction.

  11. Measure the travel deviation from the reference line.

  12. Place the travel speed control switch on the LOW position and repeat Steps 9 through 11.

Test Procedure - 568 LL



    Illustration 2g01794521
    (A) Preliminary run 5 m (16.4 ft)
    (B) Travel distance 20 m (65.6 ft)
    (C) Height of heel 0.5 to 1 m (1.6 to 3.3 ft)

  1. Travel distance must be at least 25 m (82 ft) long. Travel test ground must be hard and as level as possible.

  2. Draw a 25 m (82 ft) straight line on travel test ground as a reference line.

  3. Start the engine.

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

  5. Place the hydraulic lockout in the UNLOCKED position.

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

  7. Position the machine so that one track is parallel with the reference line. Position the machine for the travel test. Refer to Illustration 2.

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

  9. Move the machine by operating both travel levers at the same time.

  10. The first 5 m (16.4 ft) are for a preliminary run. Measure the travel time that is required to travel the remaining 20 m (65.6 ft). Measure the time that is required in each direction.

  11. Measure the travel deviation from the reference line.

  12. Place the travel speed control switch on the LOW position and repeat Steps 9 through 11.

Worksheet

Table 2
"Travel on Level Ground - Test" 
Date  Machine Serial Number 
Travel Time (time in seconds) 
Travel Speed  568 GF  568 LL  Actual 
HIGH  Forward  17.7 ± 1.1  17.7 ± 1.1   
Reverse  
LOW  Forward  30.8 ± 1.0  30.8 ± 1.0   
Reverse  
Travel Deviation(1) mm (inch) 
Travel Speed  568 GF  568 LL  Actual 
HIGH  Forward  650 mm (25.6 inch)  650 mm (25.6 inch)   
Reverse  
LOW  Forward  650 mm (25.6 inch)  650 mm (25.6 inch)   
Reverse  
(1) Travel deviation (distance) from the reference line

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