Enerpac BRP-302 User Manual
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4.
Operate the pump to build pressure, causing the cylinder to retract. The cylinder will
extend when the pressure is released. The speed of extension is dependent on the
length of the hose and other restrictions in the line.
WARNING
Keep hands and body out of the way of the cylinder and the load.
WARNING
DO NOT handle pressurized hoses. Escaping oil
under pressure can penetrate the skin, causing
serious injury. If oil is injected under the skin, see a
doctor immediately.
MAINTENANCE
Use dust caps on couplers when cylinders are disconnected to prevent dirt from entering
the system. Keep parts clean.
Inspect all components for damage or wear before and after use.
TROUBLESHOOTING
The following information is intended as an aid in determining if a problem exists. For
repair service, contact the Authorized Enerpac Service Center in your area.
WARNING
DO NOT DISASSEMBLE THE CYLINDER. The stop ring is spring loaded
and could cause serious personal injury if the cylinder is not
disassembled properly.
Problem
Possible Cause
Solution
Cylinder does not
retract, retracts slowly,
or retracts in spurts.
Oil level in pump reservoir
is low.
Add oil according to the instructions supplied with the pump.
Pump release valve open.
Close pump release valve.
Loose hydraulic coupler.
Check that all couplers are fully tightened.
Load is too heavy.
Do not attempt to lift more than rated tonnage.
Air trapped in system.
Remove air according to the instructions above.
Cylinder plunger binding.
Check for damage to cylinder.
Have cylinder serviced by a qualified hydraulic technician.
Cylinder retracts, but
does not hold pressure.
Leaking connection.
Check that all connections are tight and leak free.
Leaking cylinder seals.
Locate leak(s) and have equipment serviced by
a qualified hydraulic technician.
Internal leakage in pump.
Have pump serviced by a qualified hydraulic technician.
Cylinder does not
advance, advances part
way, or advances more
slowly than normal.
Pump release valve closed.
Open pump release valve.
Pump reservoir is
over-filled.
Drain oil level to full mark.
See pump instructions for adding oil.
Loose hydraulic coupler.
Check that all couplers are fully tightened.
Air trapped in system.
Remove air according to the instructions above.
Hose I.D. too narrow.
Use larger diameter hydraulic hose.
Cylinder retraction spring
broken or other cylinder
damage.
Have cylinder serviced by a qualified hydraulic technician.
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