C 2500 3/4 Ton Pickup 2WD V8-350 5.7L VIN M 4-bbl (1984)
Coat components with specified lubricant during assembly. If components are reused, they should be installed in original position.
1.
Press rear bearing onto pinion using suitable spacers.
2.
Install front and rear bearing races in housing, using suitable drivers to ensure that races are properly seated.
3.
Install straddle bearing in axle housing using straddle bearing installer tool No. J-23322 or equivalent to ensure that bearing is properly seated.
4.
Insert pinion through housing, install new collapsible spacer and front bearing over pinion shaft, support pinion and press front bearing onto shaft.
5.
Lubricate lips of new seal with grease and install seal using suitable driver to seat seal against shoulder of housing.
6.
Install driveshaft companion flange, washer and new pinion nut.
7.
Clamp housing in vise, hold flange with suitable tool and
torque pinion nut just until all endplay is removed.
8.
Check pinion bearing preload (rotating torque) using suitable torque wrench.
9.
Continue tightening pinion nut in small increments until specified preload is obtained, checking preload after each adjustment.
Exceeding
specified preload will collapse spacer too far to be reused. If preload specification is exceeded, spacer must be replaced and adjustment
procedure must be repeated. Do not loosen pinion nut to reduce bearing preload.
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.
