L4555_a
21
8. Reassemble the pump and reservoir, installing a
new reservoir gasket.
9. If the pump is equipped with the optional return oil
filter, replace the oil filter element.
10. Inspect the reservoir air breather, If it is clogged
or damaged, replace it with a new one. Refer to
diagram in Figure 3.
11. Fill the reservoir with new Enerpac hydraulic oil. The
reservoir is full when oil level is as shown in Figure 2.
12. Make hydraulic connections to valve ports “A” and
“B”. Start the pump and cycle it through all valve
positions under no load until all trapped air is
removed from the system, and operation of cylinder
or tool is smooth.
9.3 Filter Element
For pumps equipped with the return line oil filter (optional
accessory), the filter element should be replaced every
250 hours, or more frequently in dirty environments.
The filter manifold is equipped with a 25 psi [1,7 bar]
bypass valve to prevent over pressure rupture if filter
plugging occurs.
Replace filter element immediately if filter indicator
gauge moves into the REPLACE zone while the pump
is running. Filter element replacement is Enerpac part
number PF25.
NOTICE
Always disconnect pump AC power cord from
electrical outlet and relieve hydraulic pressure before
replacing filter element.
Figure 18: Return Line Oil Filter (optional)
