Section 5
Recirculation System
20425595
5-2005/Rev 0
5-5
Oil in the pump case provides internal lubrication for the main hydraulic pump.
Failure to the fill the pump case with oil will allow air to become trapped inside,
damaging the pump.
Figure 5-4: Case Drain
9. Disconnect the discharge hose from the fill port and replace the fill port cap.
10. Check the sight gauge again and follow the same procedure to add additional oil if
necessary.
Oil Filter Maintenance
If the filter element is not properly serviced and is allowed to fill with debris, the oil will be
forced through the relief valve, bypassing the filter. The bypass relief valve opens at 50 psi (3.4
bar).
The filter element must be replaced when the pressure gauge reading is 30 psi (2.1 bar) or greater
during normal operating conditions. Normal operating conditions indicate the machine is running
and the oil temperature has reached 115° F (46° C).
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