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 55 of 620
TM 9-2520-272-40
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SUSTAINMENT MAINTENANCE
THEORY OF OPERATION
FUNCTIONS OF THE TRANSMISSION
Vehicle Drive Power
Power is transmitted from engine to transmission through the torque converter. The torque converter is a f uid
coupling and torque multiplier. The increased torque from the torque converter is extended through selected
planetary gears to output shafts.
Left and right output shafts transmit power to the f nal drive assemblies. The f nal drive units operate sprocket drive
shafts for left and right tracks.
A clutch arrangement in the transmission enables gear selection.
Steering
Steering is accomplished through the transmission.
Braking
Braking is accomplished through the transmission.
TRANSMISSION OPERATION
Transmission operating procedures are included in vehicle operation manuals. Refer to TM 9-2350-247-10 or
TM 9-2350-277-10.
TRANSMISSION TROUBLESHOOTING
Transmission troubleshooting procedures are included in vehicle operation manuals. Refer to TM 9-2350-247-20
or TM 9-2350-277-13&P.
TRANSMISSION REMOVAL AND INSTALLATION
Procedures to remove and install the transmission are included in vehicle maintenance manuals. Refer to TM
9-2350-247-34 or TM 9-2350-277-13&P.
THEORY OF ORGANIZATION OF MAINTENANCE PROCEDURES
Manual Organization
This section discusses how to remove, disassemble, repair, assemble, and install the major assemblies of the
X200-4A Transmission.
This manual is divided into work packages that cover maintenance tasks pertaining to specif c assemblies
or groups of parts.
When a part needs to be inspected by a special method, that inspection method is explained in work package
maintenance procedures. Reuse good parts and replace bad parts.
Mandatory replacement parts, which are listed in WP 0080, are discarded and are replaced by new parts every
time the transmission is disassembled.
Equipment Items
Each work package lists steps that take parts off the transmission, repair parts, or put them back on the
transmission.
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