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Simrad SN90 Reference Manual
d
Locate the hand crank inside the Motor Control Unit.
e
Remove the hand crank from its storage position.
f
Remove the plastic plug on the top cover of the hull unit.
g
Mount the hand crank onto the stub shaft through the hole in the top cover.
h
Locate the brake release screw on the motor.
i
Use an 4 mm Allen key to rotate the screw clockwise until the motor brake is
released.
j
Turn the crank until the transducer is fully lowered.
4
Hoisting the transducer
a
Turn the crank until the transducer is fully retracted.
b
Loosen the brake release screw to engage the motor brake.
c
Check with the hand crank to ensure that the motor brake is engaged.
d
Remove the hand crank from the stub shaft, and mount it in its storage position
in the Motor Control Unit.
e
Activate the
ON.
f
Make sure that the
Note
For normal operation from the Operating Panel, the switch must be set to
REMOTE.
g
Close the door on the Motor Control Unit.
Accessing the installation trunk by lifting the hull unit
To do a visual inspection of the inside surface of the installation trunk you need access.
Access is also required to inspect and or replace the sacrificial anodes. This access can be
achieved by lifting the entire hull unit up from the installation trunk.
Prerequisites
The vessel is in dry dock. The SN90 system is turned off. The shipyard must provide all
necessary tools and manpower. The following specific items are required for this task:
• Torque wrench
• A crane (or other lifting device) capable of lifting the entire hull unit
The lifting device must be rated to minimum twice the weight of the hull unit. An
attachment point for the lifting device must be located directly above the hull unit.
Spare parts:
• Rubber gasket (Part number )
290
Motor Protecting Switch
Hoist/Lower Switch
(S301) by pressing the operating handle to
is set to REMOTE.
381294/E
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