TM 55-1520-240-23-5
6-18
INSTALL NO. 2 THRU NO. 6 FORWARD DRIVE SHAFT
(Continued)
6-18
INSTALL MOUNT BOLTS
NOTE
Install bolt in mount at each side
of shaft in same way. Right mount
shown here.
All shafts must be rotated as a unit to
keep rotor blades in phase.
5.
Rotate shaft (1) to align bolt hole (15) with mount
bushing (6).
6.
Coat thread of bolt (16) with oil (E254). Install
bolt and washer (17) bolt hole (15) into bushing
(6). Use socket and extension.
7.
Install washer (18 and 19). Torque nut to 150
to 160 inch-pounds.
8.
Check bolt (16). There shall be 0.10 to 0.17
inch of bolt threads extending through nut (19).
Install another washer (18) or a thinner washer
if needed.
9.
Check mount (7) for freedom of motion on
bushing (6). There shall be no binding.
10.
If all forward shafting is now installed, check that
mount (7) between shafts 3 and 4 is centered on
bushing (6) within ±0.06 inch. If it is not, align
shafting (Task 6-20).
INSTALL END BOLTS
11.
Install washers (20) and nuts (21) on three bolts
(13) at each end of shaft.
Do not allow bolts to turn when
torquing nuts. If bolts turn, bolts and
plates can be damaged.
NOTE
If nuts do not meet friction torque,
they must be replaced.
12.
Hold head of bolts (13) with wrench. Check nuts
for friction torque of at least 24 inch-pounds.
13.
Torque nuts to 1000 to 1100 inch-pounds.
6-56
