AAON RN-140 - Manual (Page 69)

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center of the wheel and inwards against the
spoke flanges. If hand pressure does not
fully seat the segment, insert the flat tip of a
screw driver between the wheel rim and
outer corners of the segment and apply
downward force while guiding the segment
into place.
4. Close and latch each Segment Retainer
under Segment Retaining Catch.
5. Slowly rotate the wheel 180º. Install the
second segment opposite the first for
counterbalance. Rotate the two installed
segments 90º to balance the wheel while the
third segment is installed. Rotate the wheel
180º again to install the fourth segment
opposite the third. Repeat this sequence with
the remaining four segments.
Wheel
Drive Motor and Pulley
Replacement
1. Disconnect power to wheel drive motor.
2. Remove belt from pulley and position
temporarily around wheel rim.
3. Loosen set screw in wheel drive pulley
using a hex head wrench and remove pulley
from motor drive shaft.
4. While supporting weight of drive motor in
one hand, loosen and remove (4) mounting
bolts.
5. Install replacement motor with hardware
kit supplied.
6. Install pulley to dimension as shown and
secure set screw to drive shaft.
7. Stretch belt over pulley and engage in
groove.
8. Follow start-up procedure.
Belt Replacement
1. Obtain access to the pulley side bearing
access plate if bearing access plates are
provided. Remove two bearing access plate
retaining screws and the access plate.
2. Using hexagonal wrench, loosen set screw
in bearing locking collar. Using light
hammer and drift (in drift pin hole) tap
collar in the direction of wheel rotation to
unlock collar. Remove collar.
3. Using socket wrench with extension,
remove two nuts which secure bearing
housing to the bearing support beam. Slide
bearing from shaft. If not removable by
hand, use bearing puller.
4. Form a small loop of belt and pass it
through the hole in the bearing support
beam. Grasp the belt at the wheel hub and
pull the entire belt down.
Note: Slight hand pressure against wheel
rim will lift weight of wheel from inner race
of bearing to assist bearing removal and
installation.
5. Loop the trailing end of the belt over the
shaft (belt is partially through the opening).
6. Reinstall the bearing onto the wheel shaft,
being careful to engage the two locating pins
into the holes in the bearing support beam.
Secure the bearing with two self-locking
nuts.
7. Install the belts around the wheel and
pulley according to the instructions provided
with the belt.
8. Reinstall diameter seals or hub seal and
tighten retaining screws. Rotate wheel in
clockwise direction to determine that wheel
rotates freely with slight drag on seals.
9. Reinstall bearing locking collar. Rotate
collar by hand in the direction the wheel
rotates (see label provided on each cassette
for wheel rotation).
10. Lock in position by tapping drift pin
hole with hammer and drift. Secure in
position by tightening set screw.
11. Reinstall Bearing Access Cover.
Protect hands and belt from possible
sharp edges of hole in Bearing
Support Beam.
CAUTION