Bomar SV 330 DGH, Operating Instructions Manual

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5.3. Hydraulic problems
Problem Possible causes Repair
1. Hydro generator
is not supplying
oil
• Reversed rotation Check the correct connection of
each phase. Reconnect the
electrical phases properly.
• Shortage of oil in the tank Add hydraulic oil
• Oil viscosity does not correspond to
the prescribed viscosity value
Change hydraulic oil.
• Hydro generator malfunction Call service
• Wrong power supply connection. Check the correct connection of
each phase. Reconnect the
electrical phases properly.
2. Hydraulic oil
contains bubbles
• Hydraulic circuit is not adequately
bled
Bleed the hydraulic circuit.
• Low level of oil Add hydraulic oil
• The hydro generator gasket is
damaged
Call service
3. Increased
mechanical noise
• Damaged clutch of the drive Call service
• Damaged or destroyed motor
bearings
Call service
• Air intake Check for leaks.
4. Low pressure,
pump supplies oil
• Failure on the safety valve Wrong settings. Check the
settings and adjust the safety
valve.
• Wear of the hydro generator Call service
• External or internal leakages Call service
5. Hydro generator
is seized
• Damage by solid particles in oil
Perform oil filtration or call the
service.
• Non-prescribed viscosity oil Change hydraulic oil.
• Wrong type of oil Change hydraulic oil.
• Exceeded lifespan of the pump Call service
6. Overheating oil
• Cooler malfunction Check the cooler function or call
service.
• Wear of the pump, energy is
converted into heat
Call service
7. Hydraulic valve
cannot be
readjusted
• Electromagnet has no signal
(voltage) - interrupted supply lines
Perform recheck.
• Electromagnet coil burnt Replace coil – Call service.