Raymarine ST4000+ - 2.4 Autopilot Alarms

Chapter 3. Wheel Drive Actuator
ST4000+ Autopilots Service Manual 83115-1 15
5. Desolder connector wires from the motor tags.
Gearbox removal
Refer to Figure 7. Wheel Drive Actuator exploded view.
1. Perform actions as described in Pinion sprocket removal ,
and 1, 2, 3 and 4 in Motor removal .
2. Unscrew and remove the four gearbox retaining screws (22).
3. Separate the gearbox ( 23) from the back mounting plate assembly (2)
leaving the gearbox drive shaft/gear carrier ‘C’ (21) in place.
4. Support the gearbox drive shaft/gear carrier ‘C’ (21) and drive out the pin(19).
5 Withdraw the gearbox drive shaft/gear carrier ‘C’ (21) from the back
mounting plate assembly (2).
Gearbox disassembly
5
4
7
5
4
7
5
5
5
4
6
5
4
5
3
1
4
2
1. 'O' ring
2. Small shim spacer
3. Drive shaft/carrier assembly 'C'
4. Planet gear (x22)
5. Large shim spacer (x7)
6. Carrier assembly 'B'
7. Carrier assembly 'A' (x2)
8. Gear housing
8
D3725-1
Figure 8. Gearbox exploded view