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Chapter 3. Wheel Drive Actuator

ST4000+ 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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Raymarine 400 Manuale Utente Pagina 21