Operation With Non Autohelm Autopilots (24V Systems); Functional Test - Raymarine ST6000 Service Manual

Autohelm Autohelm
Autohelm Autohelm
b) When rebuilding the clutch rotor and plate assembly ensure the rotor can be pulled
forward along the two dowels against the spring and when released it returns hard
against the mounting plate. If this is not done, the assembly will jam the drive train
when the unit is rebuilt. Also, check it pulls in and releases when a voltage is applied
and removed.
c) When refitting the mounting cover to master plate assembly, firstly ensure that all
four planet gears are correctly fitted and freely rotate when the drive shaft is rotated.
Secondly, when lowering the master plate onto the mounting cover it will help to
locate the gear train if the drive shaft is rotated slightly to engage the geared shaft
with the planet gears. Ensure the drive train rotates freely before refitting and
tightening all the screws.
d) When refitting the dust cover ensure that all leads are either secured to the
hexagonal pillars or pulled uptight through the grommet so that they are kept clear of
any moving parts.
e) Ensure that the correct drive motor (and product label) is fitted by a simple voltage
and current test checked against the serial number.

4. Operation with non Autohelm Autopilots (24v systems)

It should be noted that the 24V version of the Autohelm rotary drive requires a 12V
clutch signal. If used with other manufacturers autopilots, steps should be taken to
limit the voltage supplied to the clutch.

5. Functional Test

Having reassembled the drive unit, the following functional test (Fig.2) must be
completed.
Without stalling the output shaft it is impossible to check for clutch slip and so care
must be taken when handling the drive unit to ensure that no grease is allowed onto
the clutch surfaces.
4 SeaTalk Service Manual