Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 138 / 468

4B-66
OVERHAUL MANUAL
Fig. 23F— In s ta llin g In n er Pinion Cone and Roller
p in io n sh a ft using Tool J-5590 and co m p an io n
flange to press b e a rin g onto pinion, as in figure
24F.
8. Install flange h o ld in g b a r and install w asher and
n u t on p in io n sh aft. T o rq u e nut to 255 ft. lbs.
9. R em ove ho ld in g b a r a n d w ith an inch pound torque
w rench m easure ro ta tin g torque. R o tatin g torque
should be 10 to 20 in. lbs. w ith o rig in al bearin g s or
20 to 40 in. lb. w ith new bearings.
N O T E : T orque re a d in g to start sh aft tu rn in g
m ust be d isreg ard ed .
10. If torque req u irem en ts (preload) are not to
specifications, adjust shim pack as necessary.
Increase the o u ter shim pack to reduce ro ta tio n
torque. D ecrease shim pack to increase ro ta tin g
torque.
11. R em ove nut, w ash er an d flange from p in io n shaft.
12. Install oil slinger, gasket and using Tool J-22804
install oil seal.
Fig. 24F—Installing Pinion Flange
13. Install flange, w ash er an d nut. T orque n u t to
specifications.
DIFFERENTIAL CASE
Preload and Adjustment
1. Place differential assem bly (with p in io n assem bled)
into housing. Install b e a rin g caps in th eir p ro p e r
po sitio n an d tig h ten screws ju st enough to hold the
b e a rin g cups in place.
2. Install dial in d icato r on c a rrier w ith in d ic a to r
b u tto n contacting back o f ring gear, as in figure
19F.
3. Place two screw drivers betw een b earin g cup an d
housing on rin g g e a r side o f case, and p ry rin g g e a r
into m esh w ith p in io n g ea r as fa r as it will go. Rock
rin g g e a r to allow b earings to seat and gears to
m esh. W ith force still applied, set in d icato r to " O " .
4. R eposition screw drivers on opposite side o f rin g
g e a r a n d p ry rin g g e a r as fa r as it will go. Now take
an in d icato r read in g . R ep eat until the sam e re a d in g
is o b ta in e d every tim e. T his read in g will be the
necessary am o u n t o f shim s betw een the d ifferential
case an d differential b earin g on the rin g g ear side.
R em ove differential b earin g from the rin g g ear side
and assem ble p ro p e r am o u n t o f shim s. R eassem ble
bearing.
5. R em ove the differential b earin g from the opposite
side o f rin g gear. To d eterm in e the am o u n t o f
shim s n eeded here, use the follow ing m ethod.
a. S u b tract the size o f shim pack ju st installed on
rin g g ear side o f case from the read in g o b ta in e d
and recorded in step 10 o f D ifferential C ase—
R eassem bly.
b. To this figure, add an ad d itio n al .015" shim s to
com pensate fo r p relo ad and backlash.
Exam ple: If re a d in g in step 10 o f D ifferential C ase—
R eassem bly was .085", and the shim s installed on
rin g g ear side o f case was .055", the correct am o u n t
o f shim will be .085" — .055" + .015" = .045".
6. Install shim s as in d icated in step 5, (which will give
the p ro p e r b earin g p relo ad and backlash) and
install side bearing.
Installation
1. S p read differential carrier, using sp read er as shown
in figure 15F.
2. Install differential b e a rin g o u ter races in th e ir
correct location, th en install differential case into
carrier.
3. Install differential b earin g caps in the correct
location as in d icated by m arks m ade at disassem ­
bly.
In stall c a p screws finger tig h t. R o ta te
differential assem bly and ra p on case w ith a soft
faced h a m m e r to ensure p ro p e r seating o f case in
carrier.
R em o v e sp re a d e r a n d to rq u e cap bolts to
specifications.