Chevrolet 70 1969 Series, Руководство по ремонту

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REAR AXLE 4-9
Figure 1 5 — C h e c k in g Pinion B e a r in g Pre-Load (T ypical)
norm al bearing contact.
2. Place assem bly in arbor press and apply tons pressure
as follows: 7-8 (17121-18121); 9-10 (19121).
3. W rap soft wire around cage and pull on horizontal
line with spring scale (J-8129) (fig. 15). R otating (not
starting) torque should be within 15 to 35 inch-
pounds.
NOTE
The method of determining inch-pounds tor­
que with scale is to divide diameter of cage by
2 in order to determine radius. Multiply radius
in inches by pounds pull required to rotate cage
to determine inch-pounds torque.
Example: An 8-inch diameter divided by 2
equals 4-inch radius. Multiply 4-inch (radius)
by 5 pounds (pull) equals 20 inch-pounds tor­
que.
checked by tem porarily installing propeller shaft
yoke, washer, and nut. Tighten nut to torque recom ­
m ended in “ Specifications,” then check as previously
explained. Rem ove yoke after correct adjustm ent is
obtained.
DIFFERENTIAL ASSEMBLY
Key num bers in text refer to Figure 16.
W henever inspection shows th a t drive gear (12) m ust be
replaced, it is also necessary to install new pinion as these
parts are serviced in m atched sets.
1. Lubricate differential case inner walls and all the
com ponent parts with recom m ended axle lubricant.
2. Clean bolting surface of bevel gear and flange of dif­
ferential case. Position gear to case with bolt holes in
alignment, then install special bolt (11) with nut (14).
Tighten 1/2 inch nuts to 90-100 foot-pounds, or 5/8
inch to 190-200 foot-pounds torque.
3. Install differential side bearings (2), using an arbor
press or a suitable driver. Be sure bearing is fully
seated against shoulder on differential case.
4. Position new thrust washer (6) and side gear (7) in
bevel gear half of case. Install spider (10) with pinion
(9) in position, using all new thrust washers (8). In­
stall rem aining side gear and new' thrust washer (fig.
7).
5. Install other half of case over assembly. Align mating
m arks on differential case halves (fig. 7). Install four
cap screws (3) holding two halves of case together.
Draw the two halves together firmly. C heck assembly
for free rotation of gears; then install rem aining cap
screws. Tighten 1/2 inch cap screws to 90-105 ft.-lbs.,
or 9 /1 6 inch to 135-155 ft.-lbs. torque, then install
lock wire (4).
PINION AND C A G E INSTALLATION
4. If press is not available, preload torque can also be
Install original shim pack on carrier.
13 14 2 1
1 Bearing Cup
2 Bearing Cone
3 Cap Screw
4 Lock Wire
5 Differential Case - Right
6 Thrust Washer
7 Side Gear
8 Thrust Washer
9 Spider Pinion
10 Differential Spider
11 Bolt
12 Bevel Gear
13 Differential Case - Left
14 Nut
T-4331
Figure 16— Differential Assem bly Com ponents
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK S H O P M A N U A L