305 CR Mini Hydraulic Excavator Hydraulic System Travel on Level Ground - Test - Optional Test Caterpillar


Travel on Level Ground - Test - Optional Test
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Note: 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" 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".

Table 1
Required Tools    
Part Number     Description     Qty    
    Stopwatch     1    



Illustration 1g00816334

  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 1.

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

  1. Place the engine speed dial in the HIGH IDLE position.

  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.

Table 2
Time For Three Revolutions (time in seconds)
(S/N: BMW, DSA)    
Travel Speed     New     Rebuild     Service Limit    
HIGH     Forward     11.3 to 13.7     14.5 or less     16.0 or less    
Reverse
LOW     Forward     19.5 to 21.5     23.5 or less     26.5 or less    
Reverse

Table 3
Time For Three Revolutions (time in seconds)
(S/N: DGT)    
Travel Speed     New     Rebuild     Service Limit    
HIGH     Forward     11.1 to 13.5     14.5 or less     16.0 or less    
Reverse
LOW     Forward     19.1 to 21.1     23.5 or less     26.5 or less    
Reverse

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