Enerpac CLS-Series - Manual (Page 3)

3
8.1 TRoubLESHooTIng
1. Cylinder does not
advance, advances
slowly or in spurts.
problem
a. oil level in pump reservoir is low.
B. Release valve open.
C. loose hydraulic coupler.
d. air trapped in system.
E. Cylinder plunger binding.
possible cause
a. add oil to pump.
B. Close pump release valve.
C. Check that all couplers are fully tightened.
d. Remove air (see paragraph 5).
E. Check for damage to cylinder. have
cylinder serviced by an authorized Enerpac
service center.
2. Cylinder
advances, but does
not hold pressure.
a. leaking oil connection.
B. leaking seals.
C. Internal leakage in pump.
a. Check that all connections are tightened.
B. locate leak(s) and have equipment
serviced by an Enerpac service center.
C. have pump serviced by an authorized
Enerpac service center.
3. Cylinder does not
retract, retracts part
way or retracts more
slowly than normal.
a. Release valve closed.
B. pump reservoir overfilled.
C. loose hydraulic coupler.
d. air trapped in system.
E. oil flow to cylinder blocked.
F. hose internal diameter too narrow.
G. no load on a load return cylinder.
a. open pump release valve.
B. drain oil level to full mark.
C. Check that coupler(s) are fully tightened.
d. Remove air (see paragraph 5).
E. Check that coupler(s) are correctly
connected, fully tightened and valving is
functioning properly.
F. use a larger diameter hose.
G. Cll and ClS cylinders are load return.
apply load force to completely retract the
cylinder.
solution
5.2 air removal
advance and retract the cylinder several times
avoiding pressure build-up. air removal is complete
when the cylinder motion is smooth.
6.0 appLICaTIonS
Cll, ClR and ClS cylinders can be used in
applications such as offshore jacking and lowering,
module weighing, skidding, lifting, positioning,
supporting, foundation, construction, shipbuilding,
repair, transfer systems and civil engineering.
7.0 maInTEnanCE and SERvICE
Maintenance is required when wear or leakage is
noticed. periodically inspect all components to detect
any problem requiring service and maintenance.
Enerpac offers ready-to-use spare parts kits for
repair and/or replacements. Contact Enerpac.
ImpoRTanT: hydraulic equipment must
only be serviced by a qualified hydraulic
technician. For repair service, contact the
authorized Enerpac Service Center in
your area.
• periodically inspect all components to detect
any problem requiring maintenance and service.
Replace damaged parts immediately.
• do not exceed oil temperature above 60˚C [140˚F].
• Keep all hydraulic components clean.
• periodically check the hydraulic system for loose
connections and leaks.
• Change hydraulic oil in your system as
recommended in the pump instruction sheet.
8.0 TRoubLESHooTIng
The trouble-shooting table 8.1 is intended to be used
as an aid in determining if a problem exists.