Fläkt Woods 8265 GB 2011.10 8 Specifications are subject to alteration without notice
Installation and maintenance instruction
Fläkt Woods three phase asyncronous motor
Manufacturer: ABB
TROUBLE CAUSE WHAT TO DO
Motor vibrates Motor misaligned Realign.
Weak support Strengthen base.
Coupling out of balance Balance coupling.
Driven equipment unbalanced Rebalance driven equipment.
Defective bearings Replace bearings.
Bearings not in line Line up properly.
Balancing weights shifted Rebalance motor.
Contradiction between balancing of rotor
and coupling
(half key – full key)
Rebalance coupling or motor
Polyphase motor running single phase Check for open circuit.
Excessive end play Adjust bearing or add shim.
Scraping noise Fan rubbing air shield Remove interference.
Fan striking insulation Clear fan.
Loose on bedplate Tighten holding bolts.
Noisy operation Airgap not uniform Check and correct bracket fits or bearing.
Rotor unbalance Rebalance.
Hot bearings general Bent or sprung shaft Straighten or replace shaft.
Excessive belt pull Decrease belt tension.
Pulleys too far away Move pulley closer to motor bearing.
Pulley diameter too small Use larger pulleys.
Misalignment Correct by realignment of drive.
Hot bearings ball Insufficient grease Maintain proper quality of grease in bearing.
Deterioration of grease or lubricant
contaminated
Remove old grease, wash bearings thoroughly
in kerosene and replace with new grease.
Excess lubricant Reduce quantity of grease, bearing should not be more than 1/2 filled.
Overloaded bearing Check alignment, side and end thrust.
Broken ball or rough races Replace bearing, first clean housing thoroughly.
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