Autohelm Inboard Autopilots (ST6000 and ST7000 systems) Service ...

Autohelm- Position the support plate sub-assembly on clutch shaft and ensure Idler shaft andsupport plate pillars engage correctly, the support plate must be held square duringassembly to prevent damage to the clutch shaft.- Fully tighten the 4 off screws complete with washers to secure support plate.- Assemble rear dust cover to master plate sub-assembly and fully tighten the 2 offsecuring screws.3. Functional TestIt is important to check the clutch operation to make sure it will disengage even underload. Failure of the clutch to disengage is probably \ due to a damaged clutchtooth in which case the drive unit must be replaced.The spur reduction gearbox is noisy compared to the epicyclic gearboxes on otherdrive units. This is normal. The no load motor running current with the clutch engagedshould be less than 1.5A.The clutch current at 10V should be between 0.7 and 10A. Connect the drive unit toan ST7000 system and switch on power. Set rudder gain to maximum.- Press 'Auto'- Press '+10' 7 times to drive the unit fully out.- Check that clutch holds on end stops without any ratcheting.- Press 'Standby'- Check that clutch disengages.- Press 'Auto'- Press -10 7 times to drive unit fully in.- Check that clutch holds.- Press 'Standby'- Check that clutch disengages.6SeaTalk Service Manual