538 Forest Machine Machine Systems Swing Speed and Overswing on Level Ground - Check Caterpillar


Swing Speed and Overswing on Level Ground - Check
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1.1. Specification
2.1. Introduction
3.1. Required Tools
4.1. Test Procedure

Specification

Table 1
"Swing Speed and Overswing on Level Ground - Check" 
Overswing mm (inch) 
Item  538 GF  538 LL  Actual 
Right Swing  1476 mm (58.1 inch)  1476 mm (58.1 inch)   
Left Swing 
Swing Time(1) (seconds) 
Item  538 GF  538 LL  Actual 
Right Swing  4.5 or less  4.5 or less   
Left Swing 
(1) The time that is required to complete a 180 degree swing operation

Introduction

Measuring the swing speed and the overswing of the machine will determine if there is a need to check the swing motor or the anti-reaction valve. The fine swing control switch (if equipped) must be in the OFF position.

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 2
Description  Qty 
Measuring Tape 
Stopwatch 

Test Procedure



Illustration 1g01404964

  1. Position the machine on level ground. Position the implements at maximum reach and close the work tool. Position the work tool above the ground so that the work tool will not come in contact with any obstacles. Refer to Illustration 1 for the correct machine position.

  2. Stop the engine.


    Illustration 2g00293972
    (A) Upper frame
    (B) Undercarriage frame
    (C) Marking

  3. To indicate the relationship of the two positions, put a mark (C) on the inner race and the outer race of the swing bearing. The mark will be used as a target to stop the swing operation. Refer to Illustration 2.

  4. Start the engine.

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

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

  7. Move the swing joystick in either direction until the machine completes a 180 degree swing operation away from the target.

  8. Move the swing joystick in either direction until the machine completes a 180 degree swing operation toward the target. Return the swing joystick to the NEUTRAL position at the target.

  9. Measure the amount of overswing by measuring the distance between the marks on the swing bearing. Refer to Illustration 2.

    Note: Use a point that is visible from the operator seat as a reference point for the target.

  10. Move the swing joystick in each direction and measure the time that is required to complete a 180 degree swing operation.

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