Simrad SC90, Installation Manual

Page: 169 / 544

419050/B
167
Mounting the hull unit on top of the
installation trunk
The upper parts of the hull unit include the mechanical gantry, the hoist motor and the
Motor Control Unit. The transducer shaft is supported by the gantry, and penetrates the
mounting flange. The complete arrangement is mounted on top of the installation trunk.
Prerequisites
The shipyard must provide all necessary tools and manpower. The following specific
items are required for this task:
• Silicone grease
• Torque wrench
• A crane capable of lifting the entire hull unit
Minimum lifting capacity: 2000 kg
Note
The hull unit is heavy. Appropriate lifting equipment (lifting tackle, portable crane or
ship’s crane) is required. Always use appropriate lifting equipment to minimize risk of
personnel injury or equipment damages. Only certified equipment must be used.
Context
As a general recommendation, the
hull unit shall be oriented with the
hoist/lower motor pointing aft. If
this orientation makes it difficult to
access the Motor Control Unit, the
hull unit may be rotated to the most
suitable direction.
The hull unit, transducer and
transducer cable must be handled
with care.
Note
• The transducer is protected with
a thick layer of foam to prevent
damage during transport and hull
unit installation. This protection
must remain attached while the hull unit is being manoeuvred into the sonar room.
• The transducer is covered with a thick red protective coating made of a special
plastic type. The red protective coating is an vital part of the transducer. It is very
important that neither this coating nor the internal parts of the transducer are
damaged during the handling, installation or cleaning. Any holes and/or scratches in
Installing the SC94 Hull Unit