Chapter 3. Wheel Drive Actuator
Autopilots Service Manual 83115-1 17
Drive lever and eccentric assembly
Refer to Figure 7. Wheel Drive Actuator exploded view.
1. Assemble the drive eccentric assembly (11) and drive wheel assembly
(10) to the back mounting plate assembly (2).
2. Slide the drive lever (9) onto the drive eccentric assembly (11). Support
the drive lever (9) and insert the roll pin (8).
Note: Always use a new roll pin (8) on refit.
Pinion sprocket and belt assembly
Refer to Figure 7. Wheel Drive Actuator exploded view.
1. Slot the pinion sprocket (7) over the gearbox drive shaft (21) and pin (19).
2. With the drive lever (9) in its slack (declutched) position and the
adjustment eccentric assembly (12) is in its lowest position fit the belt (5)
around the pinion sprocket (7), drive wheel assembly (10) and
adjustment wheel assembly (13).
3. Position the support plate (4) with fitted bearing (6) onto the gearbox
drive shaft (21), drive eccentric assembly (11), adjustment eccentric
assembly (12) and over the screw pillars. Insert the five screws (3) and
secure the support plate (4).
Note: Take care not to cut new threads in the screw pillars when securing
the support plate (4).
Drive ring closure
Refer to Figure 7. Wheel Drive Actuator exploded view.
1. Rest the drive ring (1) over the rollers (18).
2. Locate the rollers (18) nearest the gearbox (23) into the groove of the
drive ring (1). Push down and around the drive ring (1) to progressively
snap the drive ring (1) over the remaining rollers (18).
3. Spin the drive ring (1) in both directions, two or three times, too ensure
the assembly is fully seated and free running.
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