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 TM 55-1905-223-24-2
a. Position gearbox over the mounting base.
b. Replace gearbox to mounting base:
(1) Keep gearbox weight on the sling and hoisting device.
(2) Replace bolts (1) and nuts (2) finger tight.
(3) Lower gearbox fully onto the mounting base.
(4) Completely tighten nuts and bolts. Torque 350 ft-lbs.
(5) Remove sling and hoisting device.
c
Replace torsional coupling, paragraph 2-21. Check alignment of the gearbox, torsional co pling, and propeller
u
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 rest against the component with the plunger at its
midrange point. There are no special or particular mounting points.
(1)
Attach a dial indicator to the output shaft of the gearbox and roate. Deviation should be less than 0.020 in.
t
(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 deviation.
d. Replace fluid transmission cooler, paragraph 2-17.
e. Replace external hardware, paragraph 2-14.
f.
Start engine; refer to TM 55-1905-223-10. Check gearbo for leaks and proper operation.
x
3-6
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