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

SEGMENT INSTALLATION AND REPLACEMENT —
Wheel segments are secured to the wheel frame by a segment
retainer, which pivots on the wheel rim and is held in place by
a segment retaining catch (Fig. 166).
To install wheel segments follow the steps below and refer to
Fig. 166.
1. Unlock two segment retainers, one on each side of the
selected segment opening.
2. With the embedded stiffener facing the motor side, insert
the nose of the segment between the hub plates.
3. Holding segment by the two outer corners, press the seg-
ment towards the 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 the outer corners of the segment and apply
downward force while guiding the segment into place.
4. Close the latch each segment retainer under the segment
retaining catch.
5. Slowly rotate the wheel 180 degrees. Install the second
segment opposite the first for counterbalance. Rotate the
two installed segments 90 degrees to balance the wheel
while the third segment is installed. Rotate the wheel 180
degrees again to install the fourth segment opposite the
third. Repeat this sequence with the remaining four seg-
ments.
5
4
Fig. 166 — Segment Installation
WHEEL DRIVE MOTOR AND PULLEY REPLACE-
MENT
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. 167
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 176.
SOLID BELT REPLACEMENT (Fig. 168)
1. Obtain access to the pulley side bearing access plate.
Bearing access plates are not provided on 25 to 36-in.
1
4
3
2
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cassettes. Remove the two bearing access plate retain-
ing screws and the access plate.
2. Using a hex wrench, loosen the set screw in the bear-
ing 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.
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 trail-
ing end of the belt over the shaft (Fig. 168 shows the
solid belt partially through the opening).
6. Reinstall the bearing onto the wheel shaft, being care-
ful 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 Adjusting Air Seals on page 183 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
provided 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. 167 — Pulley Location
184
CAUTION
WHEEL
MODEL DIM A
NO.
1
25-52 /
58-68 7 /
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4

16