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TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download

Page 57 of 828

TM 9–2350–311–20–2 1–26 1–18 EQUIPMENT OPERATION AND DESCRIPTION — CONTINUED 1–18.1 Mount and Howitzer Assembly — Continued a. Mount Assembly 1 MOUNT. The mount (16) serves as a fulcrum for the elevation and depression of the cannon assembly. The breech ring band (para 1–18.1a.) connects to the mount by means of recoil cylinder rods. 2 VARIABLE RECOIL MECHANISM. The variable recoil mechanism (17) absorbs and reduces the recoil force of the cannon assembly. 3 RECUPERATOR. The recuperator (18) returns the cannon tube to battery after firing. 4 COUNTER RECOIL BUFFER ASSEMBLY. The counter recoil buffer assembly (19) absorbs shock; slows and cushions the cannon assembly as it returns to battery. 5 ACTUATOR. The actuator (20) adjusts recoil position depending on cannon elevation. Allows longer recoil at low elevation and short recoil for high elevation. 6 BLEEDER VALVE, VARIABLE RECOIL CYLINDER. The bleeder valve (21) is used to purge air from the recoil mechanism. 7 BUFFER BLEED BLOCK PLUG. The buffer bleed block plug (22) is used to purge counterrecoil buffer. 16 17 21 18 22 20 19 17