Chevrolet 70 1969 Series, Shop Manual

Page: 148 / 913

REAR SUSPENSION 4A-9
All Axles
1. Connect propeller shaft to rear axle yoke
as directed in " P R O P E L L E R S H A F T S " (SEC. 4D).
2. On 2-speed axles connect wiring to elec­
tric shift unit or air line to shift chamber, also
connect air line to inter-axle differential lock shift
cylinder on forward axle of tandem units.
3. Install axle shafts as directed under head­
ing "Axle Shaft Replacement" in this section.
4. Fill to level of filler plug opening with
lubricant recommended in L U B R IC A T ION (SEC. 0)
of this manual.
Figure 10— Inter-Axle Shift Chamber and
Housing Installed (Rockwell!
COM PO NENT REPLACEMENT
At inspection intervals it may be advisable to
replace certain items which are accessible with­
out necessitating removal of complete axle as­
sembly.
AXLE SHAFT REPLACEMENT
R E M O V A L
Procedure for removal of axle shafts is the
same with axle assembly removed or installed4n
the vehicle.
1. Remove nuts from studs attaching axle shaft
flange to wheel hub.
2. Strike center of flange with a lead hammer
to loosen flange and split tapered dowels from
studs.
3. Remove split tapered dowels from studs.
In some instances it may be necessary to spread
dowels, while being removed.
4. Grasp axle shaft flange and pull outward to
remove. Remove and discard gasket.
IN S T A L L A T IO N
1. Install new gasket over hub studs and
against hub.
2. Dip splined end of shaft in axle lubricant,
and insert shaft through hub.
3. Turn shaft as necessary to index shaft
splines with differential side gear splines.
4. As shaft is pushed inward, rotate as neces­
sary to align flange holes with hub studs, then
press shaft inward until flange is against hub.
5. Install split tapered dowel over each stud.
Install and tighten 5 /8 " nuts to 50-60 ft.-lbs. torque
or 1 /2 " nuts to 30-40 ft.-lbs. torque.
6. Observe that clearance exists between nut
and flange (fig. 5). If no clearance exists, this in­
dicates excessive wear at studs, dowels, or flange
holes. Replace worn parts if necessary.
TWO-SPEED SHIFT UNIT
REPLACEMENT
R E M O V A L - E A T O N
1. Remove two shift housing to carrier stud
nuts and lock washers (fig. 2).
2. Remove shift unit assembly.
3. On electric shift units remove lock nuts
and the two wires from shift housing. Note that the
Figure 11 — Electric Shift Unit Seal Markings
CHEVROLET SERIES 70 -80 H EAVY DUTY TRUCK SH O P M A N U A L