TM-9-2520-272-40
CROSS-DRIVE TRANSMISSION WITH CONTAINER MODEL X200-4A
TECHNICAL MANUAL; SUSTAINMENT MAINTENANCE MANUAL
FEBRUARY 2012
TM-9-2520-272-40 - Page 513 of 620
TM 9-2520-272-40
0063
SUSTAINMENT MAINTENANCE
CHECK OUTPUT SHAFT DRAG, LEFT AND RIGHT SIDE
INITIAL SETUP:
Tools and Special Tools
Chisel, Cold, 3/8”, Flat (WP 0079, Item 7)
Socket, Socket Wrench, 1/2” Drive, 1-1/2” Spline
(WP 0079, Item 38)
Tool Kit, General Mechanic’s (GMTK) (WP 0079,
Item 45)
Wrench, Torque, Ratcheting, 1/2” Drive, 250 lb-ft
(WP 0079, Item 51)
Personnel Required
Track Vehicle Repairer, 91H10
References
WP 0065
WP 0066
Equipment Condition
All maintenance actions have been completed
When the left or right cover has been removed and maintenance work has been performed on either cover, or
the left or right end of the center housing, the output shaft(s) on the side(s) where the work was performed must
be given a drag check. This check will indicate if an assembly error exists such as omission of a spacer or
gear or binding of parts.
The output shaft drag check is performed after assembly of the transmission has been completed. The
transmission must be on the work table or on the f oor in the normal upright operating position.
The output shaft drag check is performed on a dry transmission (i.e., a transmission not f lled with oil). Each output
sha
f
tinadrytransm
iss
ionshou
ldro
ta
tew
i
ththeapp
l
ica
t
iono
f20lb-
f
t(27N·m)o
ftorque
. Whenro
ta
t
iono
f
the output shaft produces a torque reading higher than 20 lb-ft (27 N·m), the side with the faulty drag must be
disassembled and checked for missing parts or parts improperly installed.
NOTE
A high drag check torque reading on a wet transmission should not be interpreted as an
indication of a problem. For example, a transmission full of oil may produce a normal drag
check reading of 50 lb-ft (68 N·m) or more because of all the oil being moved around. However,
an uneven drag check reading, such as 50 lb-ft (68 N·m) on one shaft and 40 lb-ft (54 N·m) on
the other shaft, would indicate something binding in the side with the higher reading.
When there is excessive drag on one output shaft, there will probably also be excessive drag
on the other output shaft. The output shaft with the higher torque reading represents the side of
the transmission which must be disassembled.
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