Wheel Drive Motor And Pulley Replacement; Solid Belt Replacement - Carrier AERO 39MN Installation, Start-Up And Service Instructions Manual

TO
REMOVE
DIAMETER SEAL
ADJUSTING SCREWS
Fig. 116 — Diameter Seal Adjustment
5
4
Fig. 117 — Segment Installation

WHEEL DRIVE MOTOR AND PULLEY REPLACEMENT

1. Disconnect power to the wheel drive motor.
2. Remove the belt from the pulley and position it tempo-
rarily around the wheel rim.
3. Loosen the set screw in the wheel drive pulley using an
Allen wrench and remove the pulley from the motor
drive shaft.
4. While supporting the drive motor's weight in one hand,
loosen and remove the four mounting bolts.
5. Install the replacement motor using the hardware kit
supplied.
6. Install the pulley to the dimension shown in Fig. 118
and secure the set screw to the drive shaft.
7. Stretch the belt over the pulley and engage it in the
groove.
8. Follow the start-up procedure on page 121.
SOLID BELT REPLACEMENT (Fig. 119)
1. Obtain access to the pulley side bearing access plate.
Bearing access plates are not provided on 25 to 36-in.
cassettes. Remove the two bearing access plate retaining
screws and the access plate.
2. Using a hex wrench, loosen the set screw in the bearing
locking collar. Using a light hammer and drift (in drift
pin hole), tap the collar in the direction of wheel rotation
to unlock the collar. Remove the collar.
ROTATION
TO
ADJUST
FEELER
a39-2384
GAUGE
1
4
3
2
a39-2385
3. Using a socket wrench with extension, remove the two
nuts that secure the bearing housing to the bearing sup-
port beam. Slide the bearing from the shaft.
NOTE: Slight hand pressure against wheel rim will lift
the wheel's weight from the inner race of the bearing to
assist bearing removal and installation. If not removable
by hand, use a bearing puller.
4. Using a wrench, remove the diameter seal retaining
screws (25 to 68-in. cassettes). Remove diameter seals
(25 to 68-in. cassettes) from the bearing beam.
Protect hands and belt from possible sharp edges of hole in
bearing support beam.
5. 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. Loop the trailing end
of the belt over the shaft (Fig. 119 shows the solid belt
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 the two
self-locking nuts.
7. Install the belts around the wheel and pulley according
to the instructions provided with the belt.
8. Reinstall the diameter seals and tighten the retaining
screws (see page 128 for seal adjustment). Rotate the
wheel clockwise to determine that it rotates freely with
slight drag on the seals.
9. Reinstall the bearing locking collar. Rotate the collar by
hand in the direction the wheel rotates (see label provid-
ed on each cassette for wheel rotation). Lock the collar
in position by tapping the drift pin hole with a hammer
and drift. Secure in position by tightening the set screw.
10. Reinstall the bearing access cover.
11. Apply power to the wheel motor and ensure that the
wheel rotates freely without interference.
Fig. 118 — Pulley Location
129
CAUTION
WHEEL
MODEL DIM A
NO.
25-52 1
7
58-68
a39-2386
/
4
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16