TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
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TM 9-2350-311-34-2 Functional group and part 09 Traversing mechanism Number of Variations 2 How assemblies/parts differ M109A4/M109A5 howitzers have modified traversing mechanisms. The electric clutch has been re- placed by a hydraulic clutch. The brush assembly has been elimi- nated, and a clutch valve replaces it. A different handwheel is also used. 10 Cover assembly, commander’s cupola 2 Some M109A3 howitzers have cov- er with outside locking latch. Some M109A3 howitzers and all M109A2 howitzers have no outside latch. 1-16 EQUIPMENT DATA Tabulated data concerning the M185/M284 cannon assembly, M178/M182 mount, equilibrated system, rammer, and equil- ibrated elevating cylinder can be found below. Data following applies to both mount and cannon configurations unless otherwise specified. This is supplemental to data contained in TM 9-2350-311-20-2. M185/M284 CANNON ASSEMBLY Bore diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 mm Center ofgravity oftube/barrel assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.87 in. (238cm) (M185) (forward from rear of tube) 113.37 in. (288 cm) (M284) Center of gravity of cannon/cannon assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98.12 in. (249 cm)(M185) (complete from rear face of breech ring) 102 in. (259 cm) (M284) Length: Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238.5 in. (605.8 cm) (M185) 240 in. (609.6 cm) (M284) Cannon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271.38 in. (689 cm) (M185) 274.12 in. (696 cm) (M284) Weight: Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3166 lb (1436 kg) Muzzle brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 lb (159 kg) Evacuator chamber (approx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 lb (34kg) Cannon (complete) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4320 lb (1960kg) (M185) 4390 lb (1991 kg) (M284) 1-39