Enerpac BPR-Series - Manual (Page 9)

9
6.0 MAINTENANCE
6.1 Press
1. Remove P-51 hand pump handle when the press is not
in use.
2. Keep work area and press bed free of dirt, chips and
unnecessary tools and fixtures.
3. Periodically check the press frame to make sure that all
bolts are tight and frame parts are undamaged Replace
or properly repair damaged parts immediately.
4. If the paint becomes badly chipped, the unit should be
repainted to prevent rusting and keep the frameʼs
appearance neat.
6.2 Pump
1. Maintain proper oil level in all pumps. Use only Enerpac
hydraulic oil. Use of other fluids may damage the pump
and will void your Enerpac warranty
2. Change the oil as recommended in the pump
instruction sheets.
3. Keep pumps clean and free of debris.
4. Do not obstruct air flow around the electric pump.
6.3 Air Removal
1. With the pump positioned higher than the cylinder,
advance and retract the cylinder several times avoiding
pressure build-up. Air removal is complete when the
cylinder motion is smooth. Carefully read the
instructions included with the pump and cylinder for
detailed procedures of air removal.
Problem
Cylinder does not advance,
advances slowly, or advances in
spurts.
Cylinder advances, but does not
hold pressure.
Cylinder does not retract, retract
part way, or retracts more slowly
than normal.
Possible Cause
Oil level in pump reservoir is low.
Pump release valve open.
Loose hydraulic coupler.
Load is too heavy.
Air trapped in system.
Cylinder plunger binding.
Leaking connection.
Leaking cylinder seals.
Internal leakage in pump.
Pump release valve closed.
Pump reservoir is over-filled.
Loose hydraulic coupler.
Air trapped in system.
Hose I.D. too narrow.
Cylinder retraction spring broken or
other cylinder damage.
Cylinder attachments are too heavy
for a single acting cylinder.
Solution
Add oil according to the pump
instructions.
Close pump release valve.
Check that all couplers are fully
tightened.
Do not attempt to lift more than
rated tonnage.
Remove air according to the
instructions on page 9, Sec. 6.3.
Check for damage to cylinder.
Have cylinder serviced by a qualified
hydraulic technician.
Check that all connections are tight
and leak free.
Locate leak(s) and have equipment
serviced by a qualified hydraulic
technician.
Have pump serviced by a qualified
hydraulic technician.
Open pump release valve.
Drain oil level to full mark. See
pump instructions for adding oil.
Check that all couplers are fully
tightened.
Remove air according to the
instructions on page 9, Sec. 6.3.
Use larger diameter hydraulic hose.
Have cylinder serviced by a qualified
hydraulic technician.
Use a double acting cylinder or
reduce the weight of the attachment.
7.0 TROUBLESHOOTING