32DF9T02.C
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1. IN/OUT MOTOR AND GEARBOX
The in/out motor drives the deployment system. The motor receives electric power from the on-board
electronic controller; voltage polarity determines the direction of motor rotation (which determines
whether platform is deployed or stowed). The motor drives the gearbox, reducing the motor speed and
increasing torque. The gearbox drives the primary drive chain.
a. In/Out Motor and Gearbox Removal
1) Deploy platform using control pendant ( /OUT).
WARNING!
THE SERVICE ACCESS PANEL IS HINGED ALONG THE REAR EDGE AND SHOULD
BE HELD UP WHILE REMOVING THE RETAINING SCREWS AT THE FRONT EDGE.
THIS WILL PREVENT PANEL FROM FALLING AND CAUSING INJURY OR DAMAGE.
2) Lower access panel by following Lift Service Access instructions at beginning of chapter.
3) Position primary drive chain master-link at bottom-center of its travel by moving carriage in
or out of enclosure.
4) Support platform.
WARNING!
•• WEAR PROTECTIVE CLOTHING AND EYE PROTECTION AT ALL TIMES. BAT-
TERIES CONTAIN ACID THAT CAN BURN. IF ACID COMES INTO CONTACT
WITH SKIN, IMMEDIATELY FLUSH AFFECTED AREA WITH WATER AND WASH
WITH SOAP.
•• WORK IN A PROPERLY VENTILATED AREA. DO NOT SMOKE OR USE AN OPEN
FLAME IN THE VICINITY OF BATTERY.
•• DO NOT LAY ANYTHING METALLIC ON TOP OF BATTERY.
5) Disconnect positive battery cable at vehicle battery compartment.
6) Refer to Figure 4-17. Loosen two nuts fastening the gearbox to carriage.
7) Label motor electrical leads, and then disconnect.
8) Remove motor retaining clamp.
9) Slide gearmotor assembly toward platform.
10) Remove primary drive chain master link; remove chain.
11) Remove two nuts and washers fastening gearbox to carriage; support gearmotor assembly.
12) Remove rubber isolation gasket from gearmotor, and remove gearmotor assembly from car-
riage.
13) Remove nuts and washers fastening motor to gearbox.
14) Separate motor from gearbox; do not damage or lose rubber coupler.
NOTE: Refer to next section for re-installation.
b. In/Out Motor and Gearbox Installation
1) Refer to Figure 4-16. Slide rubber coupler onto gearbox input shaft.
2) Insert motor output shaft into coupler, and then align motor and gear box:
Hold motor with electrical connections pointed at you, and positioned at 5 o’clock.
Hold gearbox with its output housing up.
Align motor studs with holes in gearbox flange and assemble.
3) Install star-washers and nuts on motor studs.
4) Place gearmotor assembly in carriage, with gearbox studs inserted in mounting tab slots.
5) Install lock washers and nuts on gear box studs. Do not tighten.
6) Install motor retaining clamp and vibration isolation gasket; the clamp fits over tab on gear-
motor support bracket. Do not tighten clamp.
7) Refer to PRIMARY DRIVE CHAIN INSTALLATION section. Install primary drive chain.
8) Reconnect two motor electrical leads.
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