5
If the motor is sluggish or inefficient, try flushing with solvent in
well ventilated area. Disconnect the air line and muffler and add
several teaspoons of solvent. Rotate the shaft by hand in both
directions for a few minutes, again connect the air line and apply
pressure slowly until there is no trace of solvent in exhaust air.
(Keep face away from exhaust air). Check the muffler felts for
grease, dirt, etc. If dirty, wash them in solvent. Replace the felts
and connect the muffler. Relubricate the motor with a squirt of oil
in the chamber. If the vanes need replacing, or foreign particles
are present in motor chamber, an experienced mechanic may
remove the end plate apposite the drive shaft end.
DANGER: To prevent explosive hazard, do not pump
combustible liquids or vapors through these units.
WARRANTY STATEMENT
ENERPAC products are warranted to be free of defects in
materials and workmanship under normal use for as long as
the original purchaser owns them, subject to the guidelines and
limitations listed. This warranty does not cover: normal wear &
tear, cosmetic items, abuse, overloading, alterations,
improper fluid, or use in a manner for which they are not
intended. If the customer believes a product is defective, the
product must be delivered, or shipped freight prepaid, to the
nearest Enerpac Authorized Service Center for evaluation
and repair.
CAUSE-SOLUTION
• Air in the hydraulic system. Cycle jack up / down several times.
Bleed cylinder piston assembly by removing vent and allowing air under
piston to escape. Retighten vent.
• Check reservoir oil level.
• Air in system.
• Be sure the oil reservoir is filled to normal level.
• Check all points where air might leak into system.
• Clogged or blocked intake screen.
• Oil viscosity too high. Replace with Enerpac HF hydraulic oil.
• Check for high pressure leakage at the pump (leaking at plug or relief valve).
• Oil level is low. Fill reservoir to normal level, or retrofit the pump with larger
reservoir or heat exchanger.
• Check to make sure that external adjustable relief valve is set properly.
• Damaged O-Rings. Take to nearest Enerpac Authorized Service Center for
repair.
• Defective control valve.
• Incorrect motor rotation, take to nearest Enerpac Authorized Service Center.
• Check for internal pressure leaks, or leaking retract hoses.
• Adjust internal relief and retract side relief.
• Defective over-center valve. Defective secondary lock valve.
• Pump not developing enough pressure (2,500 psi required for retraction).
PROBLEM
Sporadic cylinder action
Noisy operation
Pump oil is over heating
Pump runs but will not pump oil or
piston rod moves but will not lift load.
Piston extends but will not retract.
7.0 TROUBLESHOOTING
