308C CR Excavator Hydraulic System – Cylinder Drift – Check – Blade (If Equipped)

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    
5P-3277     Measuring Tape     1    
    Stopwatch     1    

Illustration 1 g00727765
  1. Position the machine on level ground. Refer to Illustration 1.
  1. Empty the bucket.
  1. Raise the boom high enough so that the stick can be positioned perpendicular to the ground.
  1. Fully extend the bucket cylinder.
  1. Fully retract the blade cylinder.
  1. Measure the length of the blade cylinder from cylinder pin to cylinder pin.
  1. Stop the engine.
  1. Leave the machine in this position for three minutes. Measure the length of the blade cylinder from cylinder pin to cylinder pin for drift.
Table 2
Cylinder Drift (Blade)    
Item     New     Rebuild     Service Limit    
Blade Cylinder     9.0 mm (0.35 inch) or less     14.0 mm (0.55 inch) or less     23.0 mm (0.90 inch) or less