Enerpac LW-16 Instruction Sheet page 12

Problem
1. Lifting wedge will not
advance.
2. Lifting wedge advances
only part way.
3. Lifting wedge advances
in spurts.
4. Lifting wedge advances
slower than normal.
5. Lifting wedge advances
but will not hold.
6. Lifting wedge cylinder
leaks oil.
7. Lifting wedge will
not retract or retracts
slower than normal.
8. Lifting wedge advances
but does not retract
under load.
9. Lifting jaw is bent.
10. Lifting wedge advances
halfway and then stops.
11. Pressure leaks and
pump lever rises
without assistance.
Table 2 - Troubleshooting Guide, Model LWC-16
Possible Cause
a. Load too heavy for lifting wedge.
b. Pump release valve open.
c. Pump malfunctioning.
a. Low oil level.
b. Coupler not fully tightened.
c. Cylinder plunger binding or
damaged.
a. Air in hydraulic system.
b. Cylinder plunger binding or
damaged.
Pump malfunctioning.
a. Cylinder seals leaking.
b. Pump malfunctioning.
a. Worn or damaged seals.
b. Cylinder has internal damage.
a. Pump release valve is closed.
b. Broken or weak retraction spring.
c. Lifting wedge internally damaged.
Driven wedge needs lubrication.
a. Load shift.
b. Load too heavy for lifting wedge.
Air vent obstructed.
Internal wear or damage.
Reduce load or use a larger capacity lifting device.
Close pump release valve.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Add oil to reservoir.
Tighten coupler.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Purge air from system. Refer to Section 6.6.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Open pump release valve.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Remove lifting wedge from load and lubricate
driven wedge.
Reposition load to prevent load shift.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Reduce load or use a larger capacity lifting device.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
Check air vent for obstructions.
Remove obstructions if present.
Repair or replace component(s) as required.
Contact Enerpac Authorized Service Center.
12
Solution