Enerpac Hushh 30 Serie Manuel D'instructions page 7

7.0 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.
Problem
Pump will not start
Motor stalls under load
Electric valve will not operate
Pump fails to build pressure
Pump builds less than full pressure
Pump builds full pressure, but load
does not move
Cylinder drifts back on its own
Single-acting cylinder will not return
Double-acting cylinder will not return
The following information is intended to be used only as
an aid in determining if a problem exists. For repair
service, contact your local Authorized Enerpac Service
Center.
Possible Cause
No power or wrong voltage
Low Voltage
No power or wrong voltage
Valve out of adjustment
External leak in system
Internal leak in pump
Internal leak in valve
Internal leak in system component
Relief valve set too low
External system leak
Internal leak in pump
Internal leak in valve
Internal leak in system component
Load greater than cylinder capacity at full pressure
Flow to cylinder blocked
External system leak
Internal leak in a system component
Valve malfunction
Cylinder return spring broken
Return flow restricted or blocked
No load on a "load return" cylinder
Valve malfunction
Return flow restricted or blocked
7