Troubleshooting Guide - Enerpac ZG Serie Hoja De Instrucciones

reservoir is full when oil level is in middle of the sight gauge
(see fi gure 4).
6.3 Changing the Filter Element (optional)
A return line fi lter may be ordered as an accessory to the pump.
The fi lter element should be replaced every 250 hours, or more
frequently in dirty environments. The fi lter manifold is equipped
with a 25 psi (1,7 bar) bypass to prevent over pressure rupture
if fi lter plugging occurs. Filter element replacement part number
is PF25.
6.4 Check Engine Operation
See the Honda or Briggs & Stratton Owner's Manual that was
supplied with your pump. Follow the Maintenance Schedule to
keep the engine in proper operating condition.
Problem
Engine will not start
Pump fails to build pressure or 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
Pump runs hot
Trouble-shooting Guide
Possible Cause
See engine Owner's Manual
Low oil level
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
Non-load holding valve used
No load on a "load return" cylinder
Return fl ow restricted or blocked
Valve malfunction
Cylinder return spring broken
Return fl ow restricted or blocked
Valve malfunction
Advance or retract fl ow restricted
7.0 TROUBLE-SHOOTING (SEE TROUBLE-SHOOTING
GUIDE)
Only qualifi ed 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. For repair service, contact your
local Authorized Enerpac Service Center.
See section 5.0 Operation for details
Add oil per section 4.4
Adjust per section 5.2
Inspect and repair or replace
See authorized service center
See authorized service center
See authorized service center
Reduce load or add cylinder capacity
Check hydraulic couplers for full
engagement
Inspect all hydraulic connections and
replace or repair
See authorized service center
See authorized service center
Add load
Check couplers for full engagement
See authorized service center
See authorized service center
Check couplers for full engagement
See authorized service center
Check couplers for full engagement
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