d) The reason for respecting
these dimensions is to avoid
the sliding plates becoming
wedged into mounting base
resulting in the unit getting
stuck in the down position.
e) Before fixing the thruster
unit onto the mounting
base flange it is important to
ensure that the top surface
of the mounting base flange
is perfectly flat to accept the
Compact Retract base flange
3.5
FINAL FITTING OF THE THRUSTER UNIT TO THE MOUNTING BASE
a)
Make sure you provide sufficient access underneath the flange to allow for tightening the
nuts. If access is not possible, provide a special mounting flange with metric studs or tapped
holes. The bolts fixing the thruster onto the mounting flange must be inserted from top to
bottom, except for the four bolts on the bow side of the flange, which should be inserted from
the bottom to the top.
b)
Final installation of the thruster unit onto the mounting base must be made after thoroughly
cleaning and then liberally coating both joint surfaces (thruster base flange and mounting
base flange) with good quality marine grease, to ensure “O”-ring seal is compressed flat,
evenly, smoothly and squarely when the bolts are tightened.
c)
Under no circumstances should the thruster be glued or bedded down with a marine
type mastic/glue such as Sikaflex or other similar product(s).
d)
The flange bolts should be tightened sequentially and in successive passes until the two
surfaces touch.
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