MAX POWER
IMPORTANT: In both cases, the top surface of the mounting base (the flange) must
be given
particular attention
and machined perfectly flat in order to accept the « O »
ring seal of the RETRACT base flange and ensure perfect water tightness.
The bolts fixing the RETRACT onto the mounting flange must be inserted from top to
bottom.
Provide sufficient access underneath the flange to allow for tightening the nuts. If the
access is not possible, provide a special mounting flange with metric 16 mm studs or
tapped holes.
CONSTRUCTION OF HULL OPENING & CLOSING PLATE
The opening is closed by a plate, which may be made from the cutout hull section, or
specially fabricated.
This closing plate should bear against a gasket fixed to a
20 mm wide rebate
when
in the raised position.
While the hull opening closing plate is being fabricated, the RETRACT must be
temporarily secured on the mounting base flange to facilitate correct closing plate
installation.
The closing plate
must be fixed
to the fabricated aluminium adjustable mounting,
which should have 4 elongated holes for re adjustment at a later date.
To obtain a perfect hull plate fit follow these instructions
With the thrusters securely bolted down on its flange, install the hull plate bracket on
to the mounting points. Score the bracket and the mounting points to mark the
position in witch it is fitted (1).
Raise the thrusters to its highest position and then remove the locking knuckles.
Fit the locking point adjusting tools in their place. Then lower the thrusters onto its
locks (2).
Take the finished and formed hull plate and place four piles of bedding compound on
the back of the plate. Then push the plate firmly into its recess in the hull, and hold in
place until total curing of the compound (3).
Remove the locking point adjusting tools and refit the locking knuckles.
Unlock and lower the thrusters then reinforce bond between the bracket and the hull
plate with mechanical fasteners as per construction technology (4).
A gasket needs to be installed in the hulls rebate. This gasket can be made either out
off sealed
cell neoprene rubber or moulded in «SIKAFLEX » (or a similar product) to
form a flexible seal Precaution must be taken to ensure that the flexible gasket does
not glue the closing plate to the hull while drying .The plate must rest evenly, on the
gasket with a reasonable pressure.
The closing plate should be tested for adjustment at this point, raise and lower the
unit a few times.
IMPORTANT: To prevent marine growth inside the casing, it is essential that once
the unit is raised, no light be allowed to enter the turbine enclosure. Therefore the
closing plate gasket is essential and requires careful and permanent fixation.
- 6 INSTALLATION MANUAL RETRACT R 600
