BVA Hydraulics HDG10012 - Manual (Page 5)

5
TROUBLESHOOTING GUIDE
The following information is intended as an aid in determining if a problem exists. Cylinders should be repaired only by autho-
rized BVA Service Center. For repair service, contact service center in your area.
Symptom Possible Causes Corrective Action
Erratic action
• Air in system or pump cavitation.
• External leakage in cylinder.
• Cylinder sticking or binding.
• Vent the system (refer to figure 2).
• Contact service center.
• Contact service center.
Cylinder will not extend, or
respond to pressurized fluid
• Overload condition.
• Loose couplers.
• Faulty couplers.
• Improper valve position.
• Oil level in pump is low.
• Pump not operating.
• Air-locked pump.
• Remedy overload condition.
• Tighten couplers.
• Replace both female and male
couplers.
• Close release valve or change valve
position.
• Fill and bleed the system.
• Check pump’s operating instructions.
• Prime pump per pump operating
instructions.
Cylinder extend only partially
• Oil level in pump is low.
• Overload condition.
• Cylinder is sticking or binding.
• Fill and bleed the system.
• Remedy overload condition.
• Contact service center.
Cylinder move 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’s operating instructions.
• Contact service center.
Cylinder responds to pressurized
fluid, but system does not maintain
pressure
• Overload condition.
• Pump or valve malfunctioning.
• Cylinder seals leaking.
• Remedy overload condition.
• Check pump’s operating instructions.
• Contact service center.
Oil leaking from cylinder • Worn or damaged seals. • Contact service center.
Cylinder will not retract or retracts
slower than normal
• Improper valve position.
• Malfunctioning coupler, damaged
application.
• Pump reservoir overfilled.
• Cylinder damage internally.
• Open release valve or change valve
position.
• Secure load by other means.
Depressurize pump and hoses,
remove application and replace
coupler.
• Secure load by other means.
Depressurize pump and hoses,
remove application, then drain fluid to
proper level.
• Contact service center.
Poor performance
• Oil level in pump is low.
• Air trapped in system.
• Ensure proper oil level.
• Vent the system (refer to figure 2).