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
⁄8" (3 mm) deflection with moderate finger
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 nuts.
Replacing the Elevation Drive Motor
1. Remove the PCB cover, as explained in “Removing
the PCB Cover” on page 108.
2. Remove the Elevation Motor Molex connector
from the main PCB (see Figure 5-3 on page 109).
Feed the elevation motor cable through the cutout
to the front of the support frame.
3. Using an
11
⁄32" nut driver, remove the three nuts and
washers that secure the motor to the support
frame (shown in Figure 5-9 on page 117). Remove
the motor assembly.
4. Install the new motor assembly with the elevation
motor cable facing down, as shown in Figure 5-9.
Reinstall the nuts and washers but do not tighten.
5. Raise the motor and work the toothed drive belt
over the outer lip of the motor hub. Press down
gently on the motor body while rotating the
antenna reflector up and down to ensure free
movement.
6. Adjust the belt tension for a maximum of
1
⁄8" (3 mm) deflection with moderate finger
pressure between the motor and antenna pulley.
Some readjustment may be necessary if the belt
tension results in excessive antenna reflector
vibration.
7. Connect the Elevation Motor Molex connector to
the main PCB and reinstall the PCB cover.
54-0161
118
TracVision G6 Technical Manual
Excessive belt tension may result in
antenna reflector vibration.
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