12 1/4 Inch Ring Gear

DISASSEMBLY

1. Clamp pinion drive flange in suitable vise.
2. Remove cotter pin, nut, and washer from end of pinion.
3. Remove drive flange and bearing retainer assembly from pinion.
4. Drive oil seal from retainer and discard seal.
5. Remove pinion rear bearing snap ring, then, using tool J-1453 or equivalent, press bearing from pinion.
6. Position drive pinion in arbor press so that bearing is supported by two pieces of flat steel stock placed parallel to each other and against pinion so as to contact large area of bearing outer race.
7. Press pinion from bearing, ensuring that pinion is supported.

INSPECTION

1. Wash all parts in suitable solvent.
2. Inspect pinion for scored, cracked, chipped, or worn teeth.
3. Inspect splines on pinion shaft for excessive wear.
4. Inspect pinion bearing assemblies for roughness, defects, or excessive wear.

ASSEMBLY

1. Pack cavity between pinion oil seal lips with suitable lubricant.
2. Using tool J-22281 or equivalent, press oil seal into retainer with seal lips facing pinion bearing.
3. Install pinion rear bearing assembly on pinion shaft, ensuring that chamfered side of inner race seats against shoulder on pinion shaft, then, using tool J-1364 or equivalent, install pinion bearing lock ring.
4. Position pinion front bearing on pinion shaft so that extended portion of inner race faces pinion head, then, using suitable length of two inch pipe, press bearing onto shaft until bearing seats against pinion head. When pressing bearing onto pinion, be careful not to damage ground surface of pilot.
5. Slide oil seal retainer onto pinion shaft, then tap drive flange onto pinion splines.
6. Clamp drive flange in suitable vise and install flange washer and nut, torquing nut to 220 ft. lbs., then install cotter pin without backing off nut.