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 TM 55-1905-223-24-2
k.
Install bolts (17) and washers (18) through the connector flange (16) to the hu (15). Tighten bolts alternately and
b
evenly.
l.
Replace torsional coupling, paragraph 2-21. Visually check alignment of torsional coupler, gearbox, and propeller
shaft.
NOTE
The following procedures require the use of a dial
indicator.
While the procedures require the dial
indicator to be attached to the component to be
checked, the actual procedure is to affix the indicator
mounting arm to any solid mounting point which will
allow the indicator plunger to reset against the
component with the plunger at its mid-range point.
There are no special or particular mounting points.
(1) Attach a dial indicator to the output shaft of the gearbox and rotate. Deviation should be less than 0.020 in.
(2) Attach a dial indicator to the torsional coupling and rotate. Deviation should be less than 0.020 in.
(3) Attach a dial indicator to the propeller shaft and rotate. Deviation should be less than 0.020 in.
(4) If misalignment is found, attach an alignment jack and adjust bolts to eliminate devation.
i
m. Fill gearbox with oil. Reference PMCS, Item 9.
n. Start engine, referring to TM 55-1905-223-10, and check coupling for proper operation.
3-14
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