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Wheel Removal: Thumping Noise:
After following the steps above for bearing and shaft Possibly caused by a loose wheel. Rotate the wheel
removal, remove the inlet cone. This will allow the by hand and listen for noise or possible signs that
wheel to be lifted out through the inlet area. This can wheel is slipping on the shaft. If either is observed,
also be done with the shaft in place. check set screws in wheel hub and tighten if
necessary.
To replace any of the above, reverse the procedures.
Drive Noise:
Check sheaves for proper alignment. Check set
CAUTION
screws to insure that they are tight and secure. Check
belt tension. Check the adjustable pulley to be sure
IMPORTANT that all belts are properly seated.
Never attempt to increase speed/rpm on any
equipment, before checking the performance Appurtenance Noise:
data, or consulting the factory for the products Accessories installed in the airstream may be a source
brake horsepower requirements. Doing so, could of noise..
overload the motor, or exceed the maximum tip
speed rating for the wheels particular Changes in Sound
classification, which could result in damage to the Unit may be operating in an unstable region of its
fan and increases the chances of personal injury. performance curve.

MOTOR ISSUES:
TROUBLESHOOTING
Reverse Rotation:
CAUTION Incorrect Wiring.

Always shut off all power to the unit before Over Heating / High Amps:
attempting any repairs. Incorrect wiring – Fan RPM to fast – Motor undersized
for application - System static pressure (resistance)
NOISE ISSUES: lower than expected.

Bearing Noise: PERFORMANCE ISSUES:
Check bearing alignment. Lubricate bearings. If noise
persist, contact your Peerless Blowers representative. System Related:
System static pressure (resistance) is either too high
Foreign Objects: or too low for unit to perform properly as designed –
Check for and remove any foreign objects or debris Air density / temperature different from designed
found inside the housing. specifications – Accessories, such as dampers may
be closed or damaged – Filters may be in need of
Wheel Rubbing Cone: changing or cleaned – Inadequate conveying velocity,
Turn the wheel by hand to determine if the wheel is resulting in clogging of the ductwork.
touching the inlet cone. If so, loosen the bolts on the
inlet cone and re-center. If problem persist, loosen the
set screws on the wheels hub, and move the wheel
rearward.

PBOIPM-V05
REVISED 12/2018