Goff 2460, Operation And Maintenance Manual

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CHECKING THE ROTATING ASSEMBLY FOR BALANCE AND NOISE
The blast wheel assembly should always run smooth with very little vibration or noise.
Excessive vibration of the blast wheel or unusual noise during operation should be investigated
immediately. Vibration is an indication of an "out of balance" wheel. An "out of balance" blast
wheel is the result of worn or broken blades, blade blocks, impeller, and bare wheel or damaged
internal parts. When investigating an "out of balance" wheel, the blades should be inspected first,
followed by impeller, blade blocks and the bare wheel.
Damage to the internal rotating parts of the blast wheel usually occurs when blades are
allowed to be worn through or broken and abrasive enters the area behind the blade. To inspect and
replace the blades and other parts of the rotating assembly, it will be necessary to partially or
completely disassemble the blast wheel depending on the cause and remedy of the vibration or noise.
Motor failure or improper motor rotation could also cause excessive vibration or noise. Any
motor repairs or replacements should be done by a qualified electrical serviceperson.
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