Enerpac PAT1102N Instructions page 5

8.0 TROUBLESHOOTING
Only qualified hydraulic technicians should service the pump or
system components. A system failure may or may not be the result
of a pump malfunction. To determine the cause of the problem, the
complete system must be included in any diagnostic procedure.
The following information is intended to be used only as an aid in
determining if a problem exists. DO NOT disassemble the pump.
For repair service, contact the Authorized ENERPAC Service
Center in your area
PROBLEM
1) Pump will not start
2) Motor stalls under load
3) Pump fails to build pressure
4) Pump builds less than full pressure
5) Pump builds pressure, but load does not move
6) Cylinder drifts back on its own
7) Cylinder will not return
8) Low oil flow rate
* 85 psi (5,86 Bar) air pressure required to obtain 10,000 psi (700 Bar) hydraulic pressure.
A) Single-acting type
B) Double-acting type
CAUSE
Air turned off or line blocked
Low air pressure*
Inlet filter plugged, insufficient air flow
External leak in system
Internal leak in pump
Internal leak in system component
Low oil level
Low air pressure*
Internal relief valve set low
External system leak
Internal leak in system component
Load greater than cylinder capacity at full pressure
Flow to cylinder blocked
External system leak
Internal leak in system component
Return flow or coupler restricted/blocked
No load on a "load return" cylinder
Return spring broken on cylinder
Release Valve Malfunction
Return flow or coupler restricted/blocked
Valve malfunction
Reservoir not vented
Inadequate air supply
Dirty air filter
Clogged inlet filter
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