Table of Contents
Advertisement
Motor Screws, Washers
and Stop Nuts
4.6.1 Drive Belt Removal and Replacement
1. Use an
⁄
" nut driver to loosen (3) #8-32 nuts until
11
3 2
the motor is free to move upward. Raise the motor
to the top of the slots and retighten the screws to
hold it there.
2. Roll the belt over the motor hub while slowly
moving the antenna reflector along its elevation
axis. Work the belt out from between the antenna
pulley and reflector.
3. Carefully work the new belt in between the
antenna pulley and the reflector. Ensure that the
teeth are on the inside of the belt. Feed the belt
over the motor hub. Once the belt is in place, work
it back and forth to ensure that the belt is aligned
and the teeth are engaged with the motor pulley.
4. Loosen the nuts and gently press downward on
the motor hub until the drive belt is at proper
tension. Adjust the belt tension for a maximum of
1
⁄
" (3 mm) deflection with moderate finger
8
pressure between the motor and antenna pulley.
Some readjustment may be necessary if the belt
tension results in excessive antenna reflector
vibration.
5. Tighten the holding screws.
54-0166 Rev. B
Pulley
Drive Belt
Elevation Motor
Maintenance
Figure 4-7
Elevation Drive Mechanism
4-9
Advertisement
Table of Contents
Troubleshooting
