TM-9-2350-311-34-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-34-1 (c) Install dial indicator on bracket and position on gear teeth (50) as shown. (d) Hold driveshaft (39) to prevent movement and rotate bevel gearshaft (23) counterclockwise as far as possible without forcing. (e) Zero dial indicator and slowly rotate gearshaft (23) clockwise reading backlash measurement. 16 Add or remove shims (para 6-4) as required to obtain 0.004- to 0.008-in. (0.10- to 0.20-mm) backlash. 6-9