TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
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TM 9-2350-311-34-2 1-15 DIFFERENCES BETWEEN MODELS - CONTINUED Functional group and part Number of Variations How assemblies/Darts differ 02 Variable recoil actuator follower 2 Some M109A3 howitzers use eye bolts with separate tension adjust- ment hex nuts. Some M109A3 and all M109A2 vehicles use eye bolts with integral tension adjustment hex nuts. 02 Variable recoil actuator assembly 03 Equilibration manifold assembly, equilibration hand pump assembly 2 2 03 Power pack assembly 2 03 Power pack assembly direct current motor 2 03 Equilibrated elevation mechanism assembly 2 06 Segment ring and contact arm assemblies 2 Some M109A3 howitzers mount cam lever on a shaft and ball bear- ing. Some M109A3 and all M109A2 vehicles mount cam lever on a shouldered bolt and roller. Some M109A3 howitzers have equil- ibration manifold assembly with inte- gral check valves. Some M109A3 and all M109A2 howitzers have equilibration manifold assemblies tapped and threaded to connect to separate check valves. M109A4/M109A5 howitzers have eliminated internal hydraulic filter of M109A2/M109A3 howitzers, replac- ing it with two external filters. Two different types of direct current motors are used on vehicles. The different types of direct current mo- tors are interchangeable, but individ- ual parts are not interchangeable between direct current motors. Some howitzers have modified equi- librated elevation mechanism as- semblies with new internal seals and bearings. Segment ring for vehicles with 3 contact arm assemblies have more attaching hardware than segment ring on vehicles having 5 contact arm assemblies. Also, vehicles with 3 contact arm assemblies have a segment ring cover. Vehicles with 5 contact arm assemblies have no segment ring cover. 1-38