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Figure 4
7.4 Changing the Oil
1.
Drain all oil and refill with clean Enerpac oil every 12
months. If pump is used in dirty environments, change
the oil more often.
2.
Remove vent/fill cap or plug from reservoir.
3.
Tilt pump to drain out old oil.
4.
Fill reservoir only to level mark shown on pump.
5.
Replace the vent/fill cap or plug.
6.
Dispose of used oil properly.
8.0 TROUBLESHOOTING GUIDE
The following information is intended as an aid in
determining if a problem exists. For repair service, contact
the Enerpac authorized service center in your area.
9.0 TROUBLE SHOOTING
Problem
1. Cylinder does not advance,
advances slowly, or advances
in spurts.
2. Cylinder advances, but does
not hold pressure.
3. Cylinder does not retract,
retracts part way, or retracts
more slowly than normal.
Possible Cause
1. Oil level in pump reservoir is
low.
2. Release valve open.
3. Loose hydraulic coupler.
4. Load is too heavy.
5. Air trapped in system.
6. Cylinder plunger binding.
1. Leaking connection.
2. Leaking seals.
3. Internal leakage in pump.
1. Release valve closed.
2. Pump reservoir is over-filled.
3. Loose hydraulic coupler.
4. Air trapped in system.
5. Hose internal diameter too
narrow.
6. Cylinder retraction spring
broken or other cylinder
damage.
4
Figure 5
B+C
A
Solution
1. Add oil according to the Maintenance
instructions on page 3 (paragraph 7.1).
2. Close the release valve.
3. Check that all couplers are fully tightened.
4. Do not attempt to lift more than rated tonnage.
5. Remove air according to the instructions on
page 3 (paragraph 6.0).
6. Check for damage to cylinder. Have cylinder
serviced by a qualified hydraulic technician.
1. Check that all connections are tight and leak
free.
2. Locate leak(s) and have equipment serviced by
a qualified hydraulic technician.
3. Have pump serviced by a qualified hydraulic
technician.
1. Open release valve.
2. Drain oil level to full mark. See page 3.
instructions for adding oil (paragraph 7.1).
3. Check that all couplers are fully tightened.
4. Remove air according to the instructions on
page 3 (paragraph 6.0).
5. Use larger diameter hydraulic hose.
6. Have cylinder serviced by a qualified hydraulic
technician.
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