Furuno CH-270 Installation Manual page 34

Note 1: Turn off the breaker switch and cover
it with packing tape before starting
work on the hull unit. Bodily injury can
result if the hull unit is powered while
work on it is being performed. Be
sure to turn it on after completing this
section.
Note 2: Manual raising and lowering cannot
be performed. This is because the
motor brakes itself when the power is
not applied. Check raising and
lowering by turning on the breaker
switch. Also, confirm that no
obstructions exist along the travel of
the main shaft. Raising or lowering
cannot be stopped once initiated.
Note 3: The bottom of the soundome is
placed 10 mm above the bottom of
the retraction tank when the top of the
shaft retainer is 22 mm below the top
of the main shaft.
Note 4: Securely fasten the shaft retainer.
Use a wrench having a length of
approx. 300 mm.
Torque: 20-25 Nm
Gap should be nearly equal.
22
Turn off
breaker
switch
22 mm
10 mm