Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 83 / 468

REAR AXLE DIFFERENTIAL 4B-11
Fig. 4 B -2 1 --D e p th G auge In s ta lle d in P o s itio n T y p ic a l
to move. The num ber which the needle points toward
is the correct shim thickness required for a nominal
pinion. See figure 4B-22.
12. Repeat the rocking action of the plunger several
times to verify the setting.
13. Once the zero reading is obtained, swing the plunger
until it is removed from the gauging plate button.
The dial indicator will now read the required pinion
shim thickness for a "nom inal" pinion. Record this size.
14. Check the rear face of the drive pinion being installed
for a pinion code number. This num ber indicates the
necessary alteration of the pinion shim thickness as
determ ined in step 13.
a. If the pinion is stamped with a plus + number, add
th at many thousandths to the indicator reading. For example,
if indicator reading is .019, and pinion is m arked + 2 , the
correct depth shim for installation will be .019 + .002 = .021
inch.
b. If the pinion has no plus + or minus - number, use
the indicator reading as the correct shim thickness.
c. If the pinion is stam ped with a minus (-) number,
subtract th at many thousandths from the indicator reading.
F or example, if the indicator reading is .031, and pinion is
m arked (-3), the correct depth shim for installation will be
.031 -.003 = .028 inch.
15. Remove bearing caps and depth gauging tools from
carrier.
16. Position the shim selected in step 14 on the pinion
shaft against pinion head.
17. Lubricate the rear pinion bearing with liberal
am ounts of hypoid lubricant and install rear bearing onto
pinion using J-8609-01 (8-1/2" and 8-3/4" ring gear) J-5590
(7-1/2" ring gear) as shown in figure 4B-23.
Installation and Adjustm ent
1. Lubricate the front bearing with liberal am ounts of
hypoid lubricant, and place into outer cup.
2. Place a new pinion oil seal into position in carrier bore.
T ap lightly with a protective plate and a ham m er until seal
flange seats against carrier, as shown in figure 4B-24.
3. Coat lips of pinion oil seal and seal surface of pinion
flange with gear lube.
4. Install a new pinion bearing spacer onto the drive
Fig. 4 B -2 2 -U s e o f D ial In d ic a to r
pinion.
5. Remove nut and sleeve from Companion Flange
Installer J-9458. Screw J-9458 onto drive pinion and insert
assembly into housing.
6. Position com panion flange onto drive pinion. Install
sleeve and nut onto J-9458.
7. Install Com panion Flange Holding Tool J-8614-11.
See Figure 4B-25.
8. Tighten nut on Tool J-9458 which draws drive pinion
through front bearing and com panion flange. Tighten only
until end play is removed from drive pinion then remove Tool
J-9458.
NOTE:
W hen no further end play is detectable, and
"Z E R O " THE IN D IC A TO R ,
WITH THE PROBE ON
THE HIGH POINT OF
THE GAUGING SURFACE.
SWING THE PROBE OFF
THE GAUGE PLATE.
THE IN D IC A TO R NEEDLE
W ILL MOVE TOWARD. . . .
THE PROPER NUMBER,
WHICH IND IC A TES THE
REQ UIRED SHIM FOR A
N O M IN A L PINION.
THIS NUMBER IS THE
CORRECT SHIM THICKNESS
FOR A N O M IN A L PINION.