5
LO-PRO IO&M
B51021-004
Replacing Grease Terminator
Set up a regular schedule for changing the Grease Termi-
nator. Depending on the amount of grease going through the
fan, the Grease Terminator should be changed every 30 to 45
days. To replace the Grease Terminator, simply unscrew the
used canister and screw on a new one.
Notice! If the Grease Terminator becomes completely
saturated, grease will no longer be absorbed and will run
through to the roof.
Bearing Replacement
The fan bearings are pillow block ball bearings.
1. Loosen screws on bearing cover.
2. Push bearing cover toward the wheel. As the bearing cov-
er moves toward the wheel, it will slide down to reveal the
bearings and shaft.
3. Remove the old bearing.
4. Remove any burrs from the shaft by sanding.
5. Slide new bearings onto the shaft to the desired location
and loosely mount bearings onto the bearing support.
Bearing bolts and setscrews should be loose enough to
allow shaft positioning.
6. Correctly position the wheel and tighten the bearing bolts
securely to the bearing support.
7. Align setscrews bearing to bearing and secure tightly to
the shaft.
Notice! Never tighten both pairs of setscrews before se-
curing bearing mounting bolts. This may damage the
shaft.
8. Inspect the wheel position again. If necessary, readjust
by loosening the bearing bolts and setscrews and re-
peat from step 5.
Wheel Replacement
1. Drill two holes approximately centered between the shaft
and the edge of the hub OD with the following dimensions:
• 1/4” diameter
• 3/8” to 1/2” deep
• 180° apart in face of hub
2. Tap 1/4” holes to 5/16” thread with the 5/16” hole tap. Do
not drill or tap any larger than recommended.
3. Screw the puller arms into the tapped holes full depth of
threads (3/8” to 1/2” approximately). Align center of pull-
er with center of shaft. Make certain all setscrews in hub
(normally a quantity of two) are fully removed. Work puller
slowly to back wheel off the shaft.
Recommended Puller
Lisle No. 45000 Steering Wheel Puller. This puller is avail-
able at most automotive parts retail outlets.
Wheel Replacement Components
Above: Drilled Hole Location
Above: Wheel Puller
Wheel-to-Inlet Clearance
The correct wheel-to-inlet clearance is critical to proper fan
performance. This clearance should be verified before initial
start-up since rough handling during shipment could cause a
shift in fan components. Refer to wheel/inlet drawing for cor-
rect overlap.
Adjust the overlap by loosening the wheel hub and moving
the wheel along the shaft to obtain the correct value.
A uniform radial gap (space between the edge of the cone
and the edge of the inlet) is obtained by loosening the inlet
cone bolts and repositioning the inlet cone.
Wheel/Inlet Overlap
Size
Overlap
100 - 165
3/16”
180 - 245
1/4”
270 - 300
5/16”
330 - 365
3/8”
402
7/16”
445 - 490
1/2”
540
13/16”
OVERLAP
RADIAL
CLEARANCE
WHEEL SHROUD
INLET
