Chevrolet 70 1969 Series, Shop Manual

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REAR AXLE 4-37
REM O VIN G INNER
BEARING CONE
REM O VIN G INNER
ROLLER BEARING
T P M - 6 5 5 1
until seated tightly against shoulders in cage.
4. Install pinion and bearing assem bly in pinion cage.
Install sam e bearing adjusting spacer as removed at
disassembly. Press outer bearing cone on pinion.
5. Place pinion and cage in an arbor press and apply
9-10 tons pressure to bearings.
6. W rap soft wire around cage and pull on horizontal
line with spring scale (J-8129). R otating (not starting)
torque should be within limits given in “ Specifica­
tions” at end of this section.
7. Proper bearing adjustm ent is obtained by selective
spacer (26) used between pinion bearing cones. Refer
to “ Specifications” at end of this section for sizes of
spacers available.
Figure 16 — Pinion B e a r in g R e m o v a l
DIFFERENTIAL PINION GEAR BUSHING
Replacement
1. Place pinion in vise fitted with soft jaw pads, then use
hack saw to split bushing at tw o places opposite each
other. Bushing can now be easily removed.
2. Rem ove burrs or sharp edges from pinion bore which
m ight interfere with proper bushing installation.
3. Press new bushing into pinion until bushing is cen­
tered equally in pinion.
4. Burnish or ream bushing to size as indicated in
“ Specifications” at end of this section.
REASSEM BLY
All gears, thrust washers, bearings, and contact surfaces
should be coated with recom m ended differential lubri­
cant, before parts are installed, to prevent scoring
during initial axle operation.
PINION AND C A G E ASSEMBLY AND
INSTALLATION (REARWARD AXLE)
Procedures for assem bly and installation of rearw ard
axle pinion and. cage on these axles is the same as de­
scribed and illustrated in section for E aton rear axle
m odel 17121.
PINION AND C A G E ASSEMBLY (FWD. AXLE)
1. Press pinion inner tapered bearing cone onto pinion,
with wide portion of cone tow ard pinion teeth, until
seated against shoulder. Use bearing replacer plates
(J-3493) and an arbor press.
2. Press straight roller bearing (21) onto pinion, then
stake end of pinion using a staking tool or a round
nosed punch.
3. If removed press tapered roller bearing cups into cage
PINION AND C A G E INSTALLATION
(FWD. AXLE)
1. Place sam e shims (25) that were rem oved at disas­
sembly on differential carrier, then position pinion
and cage assembly in carrier.
2. Install cap screws and lock w ashers attaching cage to
carrier. Tighten cap screws to recom m ended torque.
3. Install helical drive gear (27) on pinion, then install
retaining nut (28). N u t is tightened to recom m ended
torque after differential is installed.
GEAR TOOTH CONTACT AND BACKLASH
Instructions for obtaining proper gear tooth contact and
backlash are given in “ G E N E R A L R E A R A X L E I N ­
F O R M A T I O N ” section. These instructions cover both
the “ Red L ead” and “ Pinion Setting G auge” methods.
DIFFERENTIAL ASSEMBLY
AND INSTALLATION
Procedure for reassem bly and installation of forward
and rearw ard axle differential assem bly used on these
axles is described and illustrated in “ S IN G L E R E D U C ­
T IO N R E A R A X L E ” section for E aton rear axle model
17121.
OUTPUT SHAFT INSTALLATION (FWD. AXLE)
1. If removed, install bearing cone
(
9
)
on output shaft
side gear.
2. Install side gear (8) and bearing assem bly on output
shaft and secure with snap ring.
3. Install two new O-rings (12) in grooves of output
shaft.
4. Install output shaft and bearing cone assem bly in dif­
ferential carrier.
INTER-AXLE DIFFERENTIAL ASSEMBLY
(FWD. AXLE)
1. Install thrust washers and differential pinions on dif­
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L