Chevrolet 70 Series 1970, Service Manual

Page: 223 / 841

REAR SUSPENSION 4-10
Figure J 2 —Inter-Axle Shift Chamber and Housing
Installed (Rockwell)
i n s t a l l f o u r t e m p o r a r y s t u d s w h i c h w i l l s i m p l i f y
l o c a t i n g c a r r i e r a n d g a s k e t a n d a s s i s t i n d r a w i n g
c a r r i e r i n t o p l a c e .
2 . R o l l c a r r i e r i n t o p l a c e u s i n g r o l l e r j a c k .
S t a r t c a r r i e r o v e r s t u d s a n d i n t o h o u s i n g , u s i n g
f l a t w a s h e r s u n d e r f o u r e q u a l l y s p a c e d s t u d n u t s .
3 . T i g h t e n a l l n u t s e v e n l y a n d a l t e r n a t e l y
u n t i l c a r r i e r i s i n p o s i t i o n . R e p l a c e t e m p o r a r y
f l a t w a s h e r s . I n s t a l l l o c k w a s h e r s , t h e n t i g h t e n
a l l n u t s t o s p e c i f i e d t o r q u e .
4 . P e r f o r m a d d i t i o n a l i n s t a l l a t i o n o p e r a t i o n s
a s d i r e c t e d l a t e r u n d e r h e a d i n g “ A l l A x l e s . ”
E a t o n T a n d e m F o r w a r d U n i t
1 . I n s t a l l n e w c a r r i e r t o h o u s i n g g a s k e t .
2 . R o l l c a r r i e r a s s e m b l y i n t o p o s i t i o n u s i n g
r o l l e r j a c k . S t a r t c a r r i e r o v e r s t u d s a n d d o w e l
p i n , u s i n g f l a t w a s h e r s u n d e r f o u r s t u d n u t s .
3 . T i g h t e n a l l s t u d n u t s e v e n l y a n d a l t e r n a t e l y
u n t i l c a r r i e r i s i n p o s i t i o n . R e p l a c e t e m p o r a r y
f l a t w a s h e r s . I n s t a l l l o c k w a s h e r s , t h e n t i g h t e n
a l l n u t s t o s p e c i f i e d t o r q u e .
4 . A t r e a r o f h o u s i n g , i n s t a l l n e w c o v e r t o
h o u s i n g g a s k e t o v e r s t u d s i n h o u s i n g .
5 . P o s i t i o n c o v e r a s s e m b l y , w i t h b e a r i n g a n d
o i l s e a l , o v e r s t u d s a n d o u t p u t s h a f t .
6 . I n s t a l l l o c k w a s h e r s , c a p s c r e w , a n d s t u d
n u t s . T i g h t e n t o r e c o m m e n d e d t o r q u e .
7 . A p p l y r e a r a x l e l u b r i c a n t t o r e a r b e a r i n g
COMPONENT
A t i n s p e c t i o n i n t e r v a l s i t m a y b e a d v i s a b l e t o
r e p l a c e c e r t a i n i t e m s w h i c h a r e a c c e s s i b l e
w i t h o u t n e c e s s i t a t i n g r e m o v a l o f t h e a x l e .
AXLE SHAFT REPLACEMENT
REMOVAL
P r o c e d u r e f o r r e m o v a l o f a x l e s h a f t s i s t h e
s a m e w i t h a x l e a s s e m b l y r e m o v e d o r i n s t a l l e d .
and lip of oil se a l.
8
. Install bearing retaining w ash er, p rop eller
shaft yoke, retaining w asher, and nut. Tighten nut
to recom m ended torque, u sin g holding bar and
sock et w rench in m anner illu stra ted in figure 9.
9. P erform additional in sta lla tio n operations
a s d irected la ter under heading “ A ll A x le s .”
R ockw ell Tandem Forward Unit
1. Install new c a r r ie r to housing gasket.
2. R oll c a r r ie r a ssem b ly into p osition using
r o lle r jack. Start c a r r ie r ov er stu d s in housing,
u sing flat w a sh ers under equally spaced stud nuts.
3. Tighten a ll nuts even ly and alternately
until c a r r ie r is in position. R eplace tem porary
flat w a sh ers. Install lock w a sh ers, then tighten all
nuts to sp ecified torque.
4. Install new thru shaft bearing retain er to
rea r of axle housing bowl.
5.
Install thru shaft into housing (fig. 11). A s
shaft is pushed forward, slid e clutch gear over
forw ard end of shaft.
6
. Rotate and push shaft forw ard until rear
bearing i s against housing. Install retaining cap
sc r e w s with lock w ash ers and tighten to reco m ­
mended torque.
7. Install in te r -a x le shift housing to ca r r ie r
gasket.
8
. P o sitio n shift housing to c a r r ie r (fig. 12)
with sh ift le v e r in shift co lla r groove.
9. Install and tighten cap sc r e w s and lock
w a sh ers to recom m ended torque.
10. P erform additional in stallation operations
a s d irected la te r under heading “ A ll A x le s .”
A ll A x les
1. Connect p ro p eller shaft to r ea r axle yoke
a s d irected in “ PROPELLER SHAFTS” (SEC.4D).
2. On 2- o r 3 -sp eed a x le s connect w iring to
e le c tr ic sh ift unit or air lin e s to sh ift u n its, a lso
connect air lin e to in te r -a x le d ifferen tial lock
shift cylinder on forward axle of tandem units.
3. Install axle shafts a s d irected under head­
ing “ A xle Shaft R eplacem ent” in th is sectio n .
4. F ill to le v e l of fille r plug opening with
lubricant recom m ended in LUBRICATION (SEC. 0)
of th is manual.
REPLACEMENT
1. Rem ove nuts from studs attaching axle
shaft flange to w heel hub.
2. Strike center of flange with a lea d ham m er
to loosen flange and sp lit tapered d ow els.
3. R em ove sp lit tapered d ow els from studs.
In som e in sta n ces it may be n e c e s s a r y to spread
d ow els, w hile being rem oved.
4. G rasp axle shaft flange and pull outward
to rem ove. Rem ove and d isca rd gasket.
CHEVROLET SERIES 70-90 HEAVY DUTY TRUCK SHOP MANUAL