TM-9-2350-311-34-2 Maintenance Manual for Volume 2 M109 Cab Download
Page 254 of 552
TM 9-2350-311-34-2 d. Adjustment 1 With cannon and mount still elevated to approx 55°, measure gap between sector gear and sector gear stop. 2 Depress cannon to approx 30°, measure gap between sector gear and sector gear stop. 3 If gap between sector gear and sector gear stop exceeds 1/16” (1.588 mm) with full shim pack (9) installed, remove laminations from shim pack until 1/16” (1.588 mm) maximum dimension is obtained. Initial shim re- moval may be accomplished by using the following table: GAP BETWEEN SECTOR GEAR APPROXIMATE SHIM PACK AND SECTOR GEAR STOP THICKNESS REQUIRED 3/8 0.100 in. (2.54 mm) 1/4 0.140 in. (3.556 mm) 1/8 0.170 in. (4.318 mm) 4 Optional shim removal beyond charted values may be required in order to obtain 1/16 (1.588 mm) maximum gap. (If shim removal exceeds 0.180 in. (4.572 mm) add washer (7) under screw heads). Install new lock- wire (5). 5 Install spring (4), eye bolt (3), flat washer (2) and new self-locking nut (1). 6 After cam has been properly shimmed and installed, arrows of sector gear, and spur gear sector must be alined to assure weapon in long recoil position prior to elevating weapon above 45°. 5-110 Change 2