Section 5
Recirculation System
20479279
9-2010/Rev 02
6-5
5. Remove the cap from the fill port on the oil filter.
To ensure cleanliness, the oil fill port must be used to pump oil into the reservoir.
Filling at this point guarantees the hydraulic oil will pass through the oil filter
before entering the reservoir.
6. Connect the discharge hose from the oil transfer pump to the fill port and pump the fresh
oil into the reservoir.
7. Check the oil sight gauge on the reservoir to ensure proper fill level.
8. Remove the hose from the case drain on the main hydraulic pump to make sure the pump
case fills with oil. With the hose removed, head pressure from the reservoir will force oil
into the pump case.
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.
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