Enerpac EPH-Series - Manual (Page 7)

Troubleshooting
(7)
Problem
1. Cylinder will not advance
2. Cylinder advances partly
3. Cylinder advances in spurts
4. Cylinder advances slower than
normal
5. Cylinder advances but will not hold pressure
6. Cylinder leaks oil
7. Cylinder will not retract or retracts slower
than normal
Possible Cause
A. Pump release valve open
B. No
oil in pump
C. Air in hydraulic system
D. Couplers are not fully tightened
E. Blocked hydraulic line
A. Oil level in pump too low
B. Cylinder’s plunger binding
A. Air in hydraulic system
B. Cylinder’s plunger binding
A. Leaking connection
B. Restricted hydraulic line
C. Loose coupler or fitting
A. Seals leaking
B. Leaking connection
C. Pump malfunction
A. Worn or damaged plunger
B. Leaking or loose connection
C. Internal
leakage
A. Pump release closed
B. Coupler not fully closed
C. Blocked hydraulic line
D. Pump reservoir over-filled
E. Cylinder
damaged