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38 ST4000+ Wheel & Tiller Autopilots: Owner’s Handbook
4 Maintenance & Fault Finding
Replacing the belt
The drive belt is designed to be user serviceable. If there is
insufficient adjustment to cure a slipping clutch, or if the drive belt is
damaged in any way (if it is broken, frayed or stretched), you should
replace the drive belt. You can obtain a replacement belt from any
Raymarine dealer (part number A18083). Fitting instructions are
supplied with the belt.
User serviceable parts
You can obtain the following 4000 mk2 wheel drive spare parts from
your Raymarine dealer:
Control unit
Routine checks
The control unit is a sealed unit. As a result, user maintenance is
limited to the following routine checks:
• make sure all cable connectors are firmly attached
• examine the cables for signs of wear or damage – replace any
damaged cables
Part description Part number
Front cover A18074
Clutch lever A18077
Clutch knob A18078
Pedestal bracket (torque restraint) A18080
Drive belt A18083
Clutch kit (clutch eccentric and clutch roller) A18084
Single spoke clamp, screws and inserts A18089