Chevrolet 10 Series 1970, Service Manual

Page: 195 / 671

REAR SUSPENSION AND DRIVE LINE 4-19
COMPONENT PARTS REPLACEMENT
2 4 0 0 , 2 9 0 0 , 3 3 0 0 , 3 5 0 0 A N D 3 6 0 0 LB.
C APACITY (SALISBURY-TYPE) AXLES
A x le Assem bly
Construction o f the axle assem b ly is such that s e rv ic e
operation s may be p erfo rm ed with the housing installed in
the veh icle o r with the housing installed in a holding fix ­
tu re. The follow in g rem o va l and installation procedure
is n ecessa ry only when the housing re q u ire s replacem ent.
NOTE:
A ll A x le attachments a re im portant a t­
taching parts in that they could a ffect the p e r fo r ­
mance o f vital components and system s, and/or
could resu lt in m ajor re p a ir expense. They must
be replaced with parts o f the same part numbers
o r with equivalent parts i f replacem ent becom es
n ecessa ry.
Do not use replacem en t p arts o f
le s s e r quality o r substitute design. Torque
values must be used as sp ecified during r e ­
assem b ly to assure p ro p er retention o f these
parts.
Removal
1. R aise veh icle on hoist.
2. Support r e a r axle assem bly with suitable liftin g
d evice, so that tension is r e lie v e d in springs, tie
rod, and shock ab sorb ers.
3. On v e h ic le s so equipped, disconnect tie rod at axle
housing bracket o r at d iffe re n tia l c a r r ie r .
4. R em ove trunnion bearin g " U ” bolts fro m the axle
companion flange, separate trunnion fro m flange,
p osition p r o p e lle r shaft to one side and tie it to
fra m e side ra il.
NOTE:
Secure trunion b earin gs caps to trun­
nion, using masking tape o r a la rg e rubber band,
to preven t lo ss o f b earin gs.
5. D isconnect shock a b sorb ers at lo w e r attachment
points and position out o f the way.
6. D isconnect axle vent hose fro m vent connector and
position vent hose to one side.
7. Disconnect hydraulic brake hose at connector on axle
housing. R em ove brake drum, disconnect parking
brake cable at actuating le v e r s and at flange plate.
R e fe r to Section 5 fo r cable rem ova l and brake
d etails.
8. On ve h ic le s so equipped, check c o il springs to make
sure that they are com pressed; then on all veh icles,
rem o ve axle “ U " bolt nuts, “ \J” bolts, spacers and
clam p plates.
9. L o w e r axle assem b ly and rem ove from veh icle,
installation
1. P o sitio n axle assem b ly under veh icle and align with
springs o r control a rm s as applicable.
2. Install spacer, clam p plate and “ U” bolts to axle a s ­
sem bly, lo o sely install retaining nuts to “ U” bolts.
3. P o sitio n shock ab so rb ers in lo w e r attachment b rack ­
ets and lo o sely install nut to retain shock.
4. Connect axle vent hose to vent connector at c a r r ie r .
5. Connect hydraulic brake hose to connector on axle
housing, connect parking brake cable to actuating
le v e r s . Install brake drum and wheel and tire a s ­
sem b ly --b le e d brakes and adjust parking brake as
outlined in applicable portion o f Section 5.
6. R eassem ble the p ro p e lle r shaft to companion flange,
making sure that bearing caps a re indexed in flange
seat. Install the torque bearing cap retaining nuts to
specification s.
7. P osition v e h icle so that weight is placed on suspen­
sion c o m p o n e n t s and torque affected parts to
sp ecification s.
8. L o w e r veh icle and rem ove fro m hoist.
A x le Vent
Replacement
The axle vent system consists o f the vent connector,
vent hose and associated attaching parts. When replacin g
vent hose make sure that it is routed along o rig in a l path
in such a manner that the hose is fr e e fro m kinks or
binds that would r e s tr ic t a ir flow . In rep la cin g the vent
connector; p ry old connector from c a r r ie r , being sure
that entire connector is rem oved. Tap new connector into
c a r r ie r with a so ft-fa ced ham m er, p rick punch around
edge o f hole to insure fit o f new connector (fig . 41).
A xle Shaft
Removal (Except Dana Axles)
1. R aise veh icle on hoist. R em ove wheel and tir e a s ­
sem bly and brake drum.
2 .
Clean a ll d irt and fo reig n m aterial fro m area o f
c a r r ie r co ver.
3. Loosen c a r r ie r c o v e r - t o - c a r r ie r bolts sligh tly to a l­
low lubricant to drain from c a r r ie r . R em ove c a r r ie r
co v e r and gasket.
4. R em ove the d ifferen tia l pinion shaft lo ck screw and
the d ifferen tia l pinion shaft (fig.
2 9 ).
5. Push flanged end o f axle shaft toward center o f
veh icle and rem o ve
“ C”
lock fro m button end o f
shaft.
6. R em ove axle shaft fro m housing, being carefu l not to
damage o il seal at end o f housing.
F ig . 2 9 — D iffe r e n tia l P in io n S h a ft Removal
CHEVROLET TRUCK SERVICE MANUAL