TM 10-3930-659-34 5-15.  FRONT AXLE YOKE, INPUT QUILL, AND PINION SHAFT MAINTENANCE (Con’t). 2 Clean and inspect bearings in accordance with TM 9-214. NOTE Pinion shaft and ring gear are a matched set.  If pinion shaft is damaged, ring gear MUST also be replaced (see paragraph 5-17). 3 Inspect pinion shaft gear teeth for burrs and damage.  Replace damaged pinion shaft and ring gear. 4 Inspect pinion shaft for cracks, bends, and distortion.  Replace damaged pinion shaft and ring gear. 5 Inspect front input quill for cracks and damage.  Replace damaged front input quill. d.  ASSEMBLY 1. Front Cone Point Adjustment. NOTE Dimension in step (a) is distance between differential crossbore and front input quill mounting surface on differential housing. (a). Note dimension (21) stamped on mounting surface of differential housing (3). NOTE Dimension    in    step    (b)    is    distance between face of flange on front input quill and bearing cup set. (b). Note   dimension   (22)   stamped on face of front input quill (11). (c). Add  dimension  from  step  (a)  to dimension   from   step   (b)   and   note   total dimension. 5-145