OMM-05-0509-page 11
24. Using a soft-faced mallet,
GENTLY
tap on the blower shaft in between the two bearings while turning the blower
shaft by hand. This will “
seat
” the bearing races.
The shaft MUST turn freely.
25. Tighten the set screws in both bearings.
NOTE:
If there are 2 set screws per bearing, each of the 2 set screws
must be “in line” with each other in the 2 bearings.
26. Turn the blower shaft again to make sure it turns freely and does not bind.
27. Reconnect any bearing lube lines (if applicable).
28. Slide blower sheave onto the blower shaft.
29. Align the blower and motor sheaves and adjust belt tension per the instructions from the drives manufacturer.
NOTE
: Install new shaft key and any sheave set screws.
30. While rotating the blower shaft, lubricate blower bearings with fresh grease per instructions in section B on page
9.
NOTE:
Disregard this step if the new bearings are already filled with grease.
31. Install new set screws into the wheel, or taper-lock hub bolts into the hub.
DO NOT use old screws or bolts.
Replace any set screws with knurled, cup point, set screws with a nylon locking patch.
32. Install the blower wheel onto the shaft, and in the same location on the shaft, per the dimension you took in
Step 8
on page 10.
33. Align the wheel and shaft keyways and install a new key.
34. Spin the wheel by hand to make sure it is not rubbing on the blower housing. Adjust if necessary.
35. Tighten the wheel set screw,
over the key first,
to the torque values in
Table 1
on page 5. Now, tighten the set
screw onto the blower shaft.
Or,
tighten the taper-lock hub bolts per
Table 2
on page 5.
36. Install the inlet side of the blower housing and then repeat
Step 26
above.
37. Reinstall the blower back into the system.
38. Reinstall the sheaves and belts.
39. Check the alignment of the sheaves and adjust the belt tension per the drive manufacturer's instructions.
40. Reinstall all guards and any duct work connections.
41. Unlock power to motor and turn on for about 10 minutes.
42.
Turn off and lock out power to the motor. Wait for blower wheel to come to a complete stop.
43. Remove belt guard (if applicable).
44. Check the sheave alignment and belt tension. Adjust if necessary.
45. Reinstall belt guard (if applicable).
46. Unlock power to motor and turn on.
47. Take vibration readings. They should not exceed the limits indicated on the vibration chart in
Fig. 5
on page 8.
They should also be very close to the original readings you recorded in
Fig. 4
on page 7.
48.
Repeat steps 42, 43, 44, 45, 46 and 47 (in that order) after 8 hours and again after 1 week.
E. Dampers and Valves: (Airflow control device)
Turn off and lock out power to the blower motor. Any dampers or valves should be periodically inspected to make
sure all parts are still operable within their full range and there is no interference with any other damper or blower
components. Any bearings or seals should be checked for their proper function. The manufacturers maintenance
instructions should be followed.
F. Safety Equipment & Accessories:
It is the user’s responsibility to make sure that all safety guards required by company, local, state and OSHA regula-
tions are properly attached and fully functional at all times. If any guards become defective or non-functional at any
time,
the power to the blower MUST be turned off and locked out
until complete repairs and/or replacements
have been made, installed and inspected by authorized personnel. Any accessories used in conjunction with the
blower should also be inspected to make sure they are functioning within their intended limits and design specifica-
tions. The manufacturer’s maintenance manuals should be referred to for correct maintenance procedures. These
accessories include, but are not limited to, the following:
Shaft seals, inspection doors, vibration isolators or vibration bases, air flow or pressure measuring equipment,
hoods, controls, special coatings, silencers, expansion joints, valves, flexible connectors, and filters.
VI. ORDERING REPLACEMENT PARTS:
Under normal conditions, you should not need any spare or replacement parts for at least 24 months after shipment
from Cincinnati Fan. That does not include any wear due to abrasion, corrosion, excessive temperatures, abuse,
misuse, accident or any severe conditions the fan was not designed for.
A. If this fan is vital to any process that could cost you lost revenue, we strongly recommend that you keep a
blower wheel, blower shaft and bearings, sheaves, belt(s) at your location.
B. If this fan is vital for the safety of any people and/or animals, we strongly recommend that you keep a com-
plete blower/motor assembly, as originally ordered, at your location.
To order any parts or complete units, contact us for the name of our sales office for your area. Or you can find them
on our website at:
www.cincinnatifan.com
WE MUST HAVE THE BLOWER SERIAL NUMBER FROM THE BLOWER NAME PLATE TO IDENTIFY PARTS CORRECTLY.
