Lukas ZPH 3 User Manual
Page 7
7
14
Trouble shooting
Problem
Possible Cause
Solution
Cylinder does not
advance,
advances slowy,
or advances in
spurts.
Oil level in pump reservoir is low. Add oil according to the Maintenance instructions on 12.1
Drain valve open
Drain valve closed
Loose hydraulic coupler
Check that all couplers are fully tightened
Load is too heavy
Do not attempt to lift more than rated tonnage
Air trapped in system
Remove air according to the instructions on page 8.3
Cylinder plunger binding
Check for damage to cylinder; have cylinder by a
authorised dealer or LUKAS themselves
Cylinder
advances, but
does not hold
pressure
Leaking connection
Check that all connections are tight and leak free
Leaking seals
Locate leak(s) and have equipment serviced by
authorised dealer or LUKAS themselves
Internal leakage in pump
Have pump serviced by a authorised dealer or LUKAS
themselves
Cylinder does not
retract, retracts
part way, or
retracts more
slowly than
normal
Drain valve closed
Open drain valve
Pump reservoir is over-filled
Drain oil level to full mark. See 12.1 instructions for
adding oil
Loose hydraulic coupler
Check that all couplers are fully tightened
Air trapped in system
Remove air according to the instructions 8.3
Hose I.D. too narrow
Use larger diameter hydraulic hose
Cylinder retraction spring broken
or other cylinder damage
Have cylinder serviced by a authorised dealer or LUKAS
themselves
If the defects cannot be repaired, contact an authorised LUKAS dealer or the LUKAS service
department. The address:
LUKAS Hydraulik GmbH, Weinstraße 39, 91058 Erlangen, P.O.B. 2560, 91013 Erlangen,
Germany, service phone 09131/698 348; fax 09131/698 353
15
Technical data
* 10bar = 1 MPa
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