TM 10-3930-659-34 5-15.  FRONT AXLE YOKE, INPUT QUILL, AND PINION SHAFT MAINTENANCE (Con’t). 6 Measure length (26) of tooth pattern (25). 7 Tooth pattern (25) must start 0.12-0.52 in.  (3.05-13.21 mm) from toe end of bevel pinion (23). WARNING Prussian  blue  dye  is  poisonous  and  can  burn  skin  on  contact.    Always  wear  protective  goggles and gloves, and use only in a well-ventilated area.  Overexposure to Prussian blue dye can cause serious heart and skin problems, dizziness, and unconsciousness if not handled properly. 8 Apply a light coat of Prussian blue dye to several teeth of ring gear (24). 9 Roll  bevel  pinion  (23)  and  ring  gear  (24)  back and  forth  six  times  to  obtain  good  tooth  contact pattern (25). 10 .  Repeat steps 8 and 9 in three locations, 1200 apart.      If   tooth   pattern   (25)   is   still   not   within specification,  add  or  delete  shims  as  necessary (see paragraph 5-17). 11 .  Clean Prussian blue dye from bevel pinion (23) and ring gear (24). 12 .    Apply  a  light  coat  of  lubricating  oil  to  teeth  of bevel pinion (23) and ring gear (24). 13 .   Install differential cover (see paragraph 5-17). FOLLOW-ON TASKS: •    Install front axle assembly (see paragraph 4-47). 5-151

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