6
Troubleshooting Chart - Enerpac Model BV5 Hydraulic Bench Vise
Problem
Possible Cause
Vise jaw will not retract.
Pump release valve open.
Coupler not fully connected or tightened.
Oil level in pump is low.
Pump malfunctioning.
Solid object in vise preventing movement.
Vise jaw retracts part way.
Oil level in pump is low.
Coupler not fully connected or tightened.
Vise cylinder plunger binding.
Vise chatters or vibrates as jaw retracts.
Air in hydraulic system.
Dirt, burrs or corrosion on jaw sliding tube.
Sliding tube needs cleaning and lubrication.
Vise jaw retracts in spurts.
Air in hydraulic system.
Vise cylinder plunger binding.
Vise jaw retracts slower than normal.
Leaking connection.
Pump oil fl ow too low.
Coupler not fully connected or tightened.
Pump malfunctioning.
Vise jaw retracts, but will not hold.
Vise cylinder seals leaking.
Pump malfunctioning.
Leaking connection.
Incorrect system set-up.
Vise leaks oil.
Worn or damaged seals.
Internal damage to vise cylinder.
Loose connection.
Vise jaw will not advance or advances slower
than normal.
Pump release valve is closed.
Coupler not fully connected or tightened.
Pump reservoir over-fi lled.
Narrow hose restricting fl ow.
Broken or weak tension spring.
Vise damaged internally.
Oil leaking from external relief valve.
Coupler not fully connected or tightened.
Restriction in return line.
Oil leaking from vise.
Coupler not fully connected or tightened.
Leakage from vise cylinder.
Vise jaws are bent or cracked.
Load shift.
Load too heavy for vise.
8.0 TROUBLESHOOTING
Only qualifi ed hydraulic technicians should
service the hydraulic vise and its components.
The troubleshooting chart is to be used only as
an aid in determining if a problem exits. For repair
service, contact your local Authorized Enerpac
Service Center.