540
15
TROUBLESHOOTING
Studio ti 03312 540-04usa
341
15.11 TRIM TAB SYSTEM
For further information, please refer to BERTRAM Customer Support.
Problem Cause
1. Air bubbles or foam into the system − The oil level into the tank is too low and doesn’t allow suction pipe to be completely plunged. In
this way, the pump sucks oil and air contemporarily
− Possible openings and little holes on suction pipes or faulty pump seals, which allow air to enter
inside
2. Pump doesn’t deliver oil − Wrong rotation direction
− Obstructed conduits or suction filters
− Too low oil level into the tank
− Air in leakages in suction system
− Too viscous oil with some difficulties in passing through
− The shaft or other components of the pump are broken
3. Lack of pressure in the system − Action
− Pump doesn’t deliver oil
− Relief valve is not calibrated
− Free discharge of oil to the tank somewhere into the system
4. System pressure is low or fluctuating − Possible leaks in the piping or elsewhere in pressurized parts of the system
− Relief valve set at a too low rate
− The safety valve remains open or oscillates in its housing
− Restriction of pump suction pipes or possible obstruction of filter
− Air in leakages into the suction pipes or by the pump’s seals
− Worn pump
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