6
TROUBLESHOOTING
A system failure may or may not be the result of a pump malfunction. The following information is intended to be
used as an aid in determining if a problem exists. Contact a Hein-Werner authorized service center for repair.
Symptom
Possible Causes
Corrective Action
Erratic cylinder action
• External leak
• Internal hydraulic leak
• Follow pump instructions for
bleeding air
• Tighten all connections
• Contact Service Center
Pump or cylinder fails to
maintain pressure
• Overload condition
• External leak
• Internal hydraulic leak
• Cylinder seals leaking
• Pump or valve malfunctioning
• Remedy overload condition
• Tighten all connections
• Contact Service Center
• Contact Service Center
• Check pump operating instructions
Cylinder extends partially
•
Hydraulic oil level too low in pump
•
Load is above the capacity of system
•
Cylinder is sticking or binding
•
Fill and bleed the system
•
Match the capacity to application
•
Contact Service Center
Cylinder moves slower than
normal
• Loose connection or coupler
• Restricted hydraulic line or fitting
• Pump not working correctly
• Cylinder seals leaking
• Tighten connection or coupler
• Clean and replace if damaged
• Check pump operating instructions
• Replace cylinder
Cylinder leaks hydraulic fluid
• Worn or damaged seals
• Linkage binding
• Loose couplers
• Malfunctioning coupler
• Contact Service Center
• Lubricate all moving parts
• Tighten couplers
• Depressurize pump and hose, remove
application, install new coupler
Cylinder will not retract or
retracts slower than normal
• Weak or broken retraction spring,
Cylinder damaged internally
• Pump reservoir too full
• Contact Service Center
• Contact Service Center
• Drain hydraulic fluid to correct level
Motor will not start (Model
HW93302 and HW93306)
• No power/incorrect voltage
• Damaged power cord
• Tripped circuit breaker
• Loose or faulty wiring
• Check power supply and voltage
• Contact Customer Service
• Ensure breaker is adequate size
• Contact Customer Service
Motor cuts out (Model HW
93302 and HW93306)
• Extension cord too long
• Faulty motor
• Overheated motor trips breaker
• Replace with shorter cord
• Replace or repair motor
• Allow motor to cool, reset circuit breaker
