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 TM 55-1905-221-14-3
6-16.
PROPELLER, PROPELLER SHAFT, AND STUFFING BOX (Continued).
LOCATION/ITEM
ACTION
REMARKS
ALIGNMENT (Cont)
d. Methods of Determining
Alignment.
(1)
The proper location
of the bearings on
main propulsion
shafting may be
checked by running a
line wire. This
consists of rigging
supports just
clear of the end of
the outer bearings of
the set to be aligned.
A length of piano
wire is stretched
between the supports.
The supports must be
rigid and not subject
to deflection when
the wire is put under
tension. The wire
should be attached
to the supports
in such a way that it
can be accurately
centered in the end
bearings. After
the wire has been
centered in the end
bearings, the wire
forms the line of
reference (when
corrected for sag)
for all the inter-
vening bearings.
6-192
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