Wheel, Wheel replacement, Recommended puller – COOK ACSC User Manual
Page 5: Wheel-to-inlet clearance
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.
• 1/4" diameter
• 3/8" to 1/2" deep
• 180° apart in face of hub
3. Tap 1/4" holes to 5/16" thread with the 5/16" hole tap.
Do not drill or tap any larger than recommended.
4. Screw the puller arms into the tapped holes full depth
of threads (3/8" to 1/2" approximately). Align center of
puller 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 Sterling Wheel Puller. This puller is avail-
able at most automotive parts retail outlets.
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 draw-
ing for correct overlap.
Adjust the overlap by loosening the wheel hub and mov-
ing 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.
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 - 730
13/16”
Above - Drilled hole placement.
Right - Wheel puller.