Section 5
Recirculation System
20425595
5-2005/Rev 0
5-4
Severe injury can result if the machine is not properly locked out. Observe
electrical Lockout/Tagout procedures before performing maintenance.
Ensure all pressure is relieved or blocked from the hydraulic and high pressure
circuits before performing maintenance.
2. Drain the oil reservoir by connecting the inlet hose from an oil transfer pump to the drain
valve on the reservoir.
3. Open the shutoff valve on the drain and pump the used oil out to a container.
NOTE
It is recommended that the empty reservoir be flushed with a few gallons of clean
oil to remove settled debris from the bottom.
4. Close the shutoff valve and remove the inlet hose from the drain valve.
NOTE
Oil from a new drum does not meet the cleanliness requirements of the hydraulic
system. For this reason, it is important to use an oil transfer pump that will force
oil through the return filter into the reservoir.
5. Remove the cap from the fill port on the oil filter.
6. Connect the discharge hose from the oil transfer pump to the fill port and pump the fresh
oil into the reservoir.
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.
7. Check the oil sight gauge on the reservoir to ensure proper fill level.
8. Remove the hydraulic 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.
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