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 TM 55-1905-219-14-4
3-54.
LINE SHAFTING (PORT SIDE ONLY) - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
ADJUSTMENT
NOTE
18. Engine
It is important to align the engine and
and
gear only when the boat is afloat, and
marine
NOT in drydock. During this alignment
gear
period, it is also advisable to fill the
alignment
fuel tanks and add any other ballast that
to pro-
will be used when the boat is in service.
peller
With the engine and gear in position on
shaft
the engine bed. arrangements must be made
to have a controlled lifting or lowering
of each of the four corners of the engine.
If threaded holes are provided in each of
the engine mounts, jacking screws can be
used in them. The engine can be raised
by screwing down, or lowered by backing
off the desired amount. Steel plates
must be inserted under the jacking screws
so that the jacking screw will not damage
the engine bed. Lifting can also be
accomplished by the use of properly placed
jacks. Adjustable shims also are avail-
able and can simplify the whole problem,
particularly for future realignment.
(1) It will also be necessary to move
the engine and gear from one side or
the other on the bed to obtain hori-
zontal alignment. This can be done
with a jack placed horizontally
between the engine and the foundation.
At the same time, a straight edge is
laid across the edges of the flanges
at the top and side to check the
parallel alignment of the coupling
edges.
(2) As the engine and marine gear then comes
into its aligned position, it will be
possible to match the male and female
halves of the output flange and propeller
coupling, and prepare for bolting
together. Care should be taken not to
burr or mar this connection because the
3-996
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