Raymarine ST4000+ Owner's Handbook Manual page 37

81131_7.book Page 29 Wednesday, March 17, 2004 3:59 PM
Chapter 4: Maintenance & Fault Finding
Cleaning the wheel drive
CAUTION:
Do not use mineral-based solvents (such as WD40) to lubricate or
clean the wheel drive as they will damage the material.
We recommend that you complete the following steps each season to
prevent the build-up of salt on the wheel drive bearings and drive belt:
1. Remove the wheel drive from the wheel:
• remove the wheel from the pedestal
• remove the spoke clamp screws
• remove the wheel drive front cover
2. Check inside the drive unit for any signs of damage.
3. Thoroughly flush the wheel drive interior with fresh water to
remove any salt build-up on the bearings and drive belt.
Do not lubricate any part of the wheel drive. It is designed to
run without lubrication.
4. Replace the front cover then fit wheel drive back onto the wheel.
5. Fit the wheel and wheel drive back onto the pedestal.
6. Clean the wheel drive case (using mild detergent if necessary),
then flush thoroughly with fresh water.
Adjusting the clutch
You need to adjust the clutch if the drive belt slips in Auto mode or
drags in Standby mode. In normal use, you can tell if the clutch is
slipping if the motor operates but the drive does not turn the wheel.
To adjust the clutch, first make sure that the autopilot is in Standby
mode and the clutch is disengaged. Then:
1. Use a 3 mm allen key (supplied) to loosen the clutch knob screw
about 2 turns anti-clockwise.
2. Turn the clutch knob either 4 clicks clockwise to tighten the
clutch, or 4 clicks anti-clockwise to loosen the clutch.
3. Use the allen key to re-tighten the clutch knob screw.
4. Check that the wheel still moves freely with the clutch off.
Note: If the wheel does not move freely, reduce the clutch tension by
turning the clutch knob 2 clicks anti-clockwise and check again
5. Check the drive's operation with the clutch engaged.
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