325C Excavator Hydraulic System Operational Checks Caterpillar


Operational Checks
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The operational checks can be used to find leakage in the system and components that are not functioning correctly. The speed of rod movement or the torque on a motor can be used to check the condition of the cylinders, motors and the pumps.

Perform the following operational checks in order to troubleshoot problems concerning the hydraulic circuits and components on the machine.

  • Testing and Adjusting, "Engine Performance - Test (Engine Speed)"

  • Testing and Adjusting, "Travel on Level Ground - Test"

  • Testing and Adjusting, "Travel on Level Ground - Test (Optional Test)"

  • Testing and Adjusting, "Machine Drift on a Slope - Check"

  • Testing and Adjusting, "Swing Speed and Overswing on Level Ground - Check"

  • Testing and Adjusting, "Swing Speed and Swing Drift on a Slope - Check"

  • Testing and Adjusting, "Cylinder Drift - Check (Empty Bucket)"

  • Testing and Adjusting, "Cylinder Drift - Check (Loaded Bucket)"

  • Testing and Adjusting, "Cylinder Speed - Check"

The specifications that are listed in tables for the operational checks are calculated average values. The values will vary due to the configuration of the machine and engine speed. Table 1 and Table 2 contain the machine configurations that were used in order to obtain these specifications.

ReferenceRefer to Testing and Adjusting, "Engine Performance - Test" for the specifications for engine speed.

Table 1
325C Machine Configuration    
Boom     Stick     Bucket    
6.2 m (20 feet 4 inches)    
3.2 m (10 feet 6 inches)    

1.1 m3 (1.44 yd3)    

Table 2
325C L Machine Configuration    
Boom     Stick     Bucket    

6.2 m (20 feet 4 inches)    

3.2 m (10 feet 6 inches)    

1.2 m3 (1.57 yd3)    

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