TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
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5-30 TM 9-2350-311-34-2 5-4 CANNON TUBE - CONTINUED c. Installation - Continued NOTE Mount in vehicle should be horizontal. Breech ring key should be up and secured out of the way. Torque key groove should be canted 45 degrees counterclockwise from its normal position for installation purposes. If torque key groove is not in this position for installation and chain-type pipe wrench is available, perform step 4. If chain-type pipe wrench is not available, perform steps 5 through 7. 4 Loosen gun tube sling (6). Move one wedge away from cannon tube (5) making it free to rotate. Using chain-type pipe wrench (10), rotate cannon tube 45°. Slide wedge back into place to hold cannon tube in position. Tighten gun tube sling. NOTE If chain-type pipe wrench has been used, skip to step 9. 5 Install muzzle brake (11) (TM 9-2350-311-10). 6 Install a 4 x 4 inch wooden block at least 5 feet long into muzzle brake (11). 7 Using wooden block for leverage, rotate muzzle brake (11) and cannon tube (5) 45°. Use wedge to hold can- non tube in position.