TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
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TM 9-2350-311-34-2 2-23 TROUBLESHOOTING CHART - CONTINUED b. CANNON AND MOUNT The cannon consists of the muzzle brake, thrust collar, cannon tube, bore evacuator, breech assembly, and firing mecha- nism. The mount consists of the variable recoil mechanism, dust shield, breech operating cam, buffer cylinder, recuperator, and cradle. Below is a pictorial view of the cannon with all the major assemblies installed. The muzzle brake and variable recoil mechanism reduce and absorb the recoil of the cannon tube during the firing sequence. The breech assembly houses the projectile and propellant during a firing. The firing mechanism is used to fire the cannon. 2-26