TM-9-2520-272-40 Direct Support for M113A3 X200-4A Transmission 2520-01-397-1074 Download
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TM 9-2520-272-40 0003 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. 0003‐1