GMC 1982 Light Duty Truck Service Manual page 361

Lower Control Arm Inner Pivot Shaft and/or
Bushing Replacement-On Vehicle
C IO (Rubber Bushings)
Removal (Figs. 3C-24, 3C-25)
If just bushings or pivot shaft are to be replaced the
lower control arm does not have to be removed from the
vehicle.
1. Raise vehicle on hoist and support the frame so that the
control arms hang free.
2. Position an adju stable floor jack under the lower
control arm inboard of spring and into depression of
control arm.
3. Install a chain over the upper arm inboard of the
stabilizer and outboard of shock absorber as a safety
measure.
4. Disconnect shock and stabilizer bar attachments at
lower control arm.
5. Loosen shaft end nuts.
6. Remove " U " bolts that retain the inboard end of the
lower control arm.
7. Lower jack S L O W L Y to release spring compression
(Fig. 3C-24) and gain clearance to remove bushings.
Be sure all compression is released from coil springs.
8. Remove the stakes on the front bushing using tool
J - 2 2 7 17 or equivalent tool.
9. Bushings may now be replaced. Install " C " clamps
J-24435-7 and receiver J-24435-3 with remover
J-24435-2 and spacer J-24435-6 as shown in Figure
3C-25.
10. Tighten the " C " clamp to remove the bushing.
11. Remove tools and discard old bushing.
12. Pivot shaft may now be removed if necessary.
13. Remove second bushing (leave pivot shaft in to pilot
tool) by the same method as in steps 8-12.
Bushing Installation (Fig. 3C-26)
NOTICE: See N O T I C E on page 1 of this section
regarding the fasteners referred to in step 5.
1. Install new bushings as shown in Figure 3C-26 using
spacer J-24435-6, installer J-24435-4 and " C " clamp
J-24435-7.
2. T urn clamp in until bushing seats firmly.
NOTICE: Be sure spacer J-24435-6 is in position as
shown in Figure 3C-26 to avoid collapsing control arm
during assembly.
3. Install one bushing then insert the pivot shaft and
install second bushing.
4. S ta k e front bushing at least in two places when
installed.
5. Install the lower control arm to the vehicle as described
under "Lower Control Arm - Installation", being sure
to torque all fasteners to the proper specification.
Lower Control Arm Inner Pivot Shaft And Bushing
Replacem ent-G10-G20 Models
Removal
1. Remove lower control arm as previously outlined.
2. R e m o v e p i v o t s h a f t n u t s .
3. P l a c e c o n t r o l a r m in a n a r b o r p r e s s , p r e s s f r o n t e n d o f
p i vo t s h a f t t o r e m o v e r e a r b u s h i n g , a n d p i v ot s h a f t
a s s e m b l y .
4. R e m o v e t h e s t a k e s o n t h e f r o n t b u s h i n g u s i n g T o o l
J - 2 2 7 17 o r e q u i v a l e n t tool.
5. I n s t a l l " C " c l a m p J - 2 4 4 3 5 - 7 a n d r e c e i v e r J - 2 4 4 3 5 - 3
w i t h r e m o v e r J - 2 4 4 3 5 - 2 a n d s p a c e r J - 2 4 4 3 5 - 6 a s
s h o w n in F i g u r e 3 C - 2 5 .
6. T i g h t e n " C " c l a m p t o r e m o v e t h e b u s h i n g .
Installation
NOTICE:
S e e N O T I C E
r e g a r d i n g t h e f a s t e n e r s r e f e r r e d t o in s t e p 5.
1. I n s t a l l n e w b u s h i n g s a s s h o w n in F i g u r e 3 C - 2 6 u s i n g
s p a c e r J - 2 4 4 3 5 - 6 , i n s t a l l e r J - 2 4 4 3 5 - 4 a n d " C " c l a m p
J - 2 4 4 3 5 - 7 .
2. T u r n c l a m p in u n t i l b u s h i n g s e a t s f i r ml y .
Be s u r e o u t e r t u b e h o l e is t o t h e f r o n t o r f o r w a r d s t o t h e
s t a k e d b u s h i n g .
NOTICE:
Be s u r e s p a c e r J - 2 4 4 3 5 - 6 is in p o s i t i o n a s
s h o w n in F i g u r e 3 C - 2 6 t o a v o i d c o l l a p s i n g c o n t r o l a r m
d u r i n g a s s e m b l y .
3. S t a k e f r o n t b u s h i n g a t l e a s t in t w o p l a c e s w h e n
i n s t a l l e d .
4. I n s e r t t h e p i v o t s h a f t a n d i n s t a l l s e c o n d b u s h i n g .
5. I n s t a l l t h e l o w e r c o n t r o l a r m t o t h e v e h i c l e a s d e s c r i b e d
u n d e r " L o w e r C o n t r o l A r m - I n s t a l l a t i o n " , b e i n g s u r e
t o t o r q u e all f a s t e n e r s t o t h e p r o p e r s p e c i f i c a t i o n .
Lower Control Arm Installation
NOTICE:
S e e N O T I C E
r e g a r d i n g t h e f a s t e n e r s r e f e r r e d t o in s t e p s 2 a n d 3.
1. I n s t a l l l o w e r b a l l s t u d t h r o u g h s t e e r i n g k n u c k l e a n d
t i g h t e n n u t .
2. I n s t a l l s p r i n g a n d c o n t r o l a r m a s o u t l i n e d u n d e r s p r i n g
i n s t a l l a t i o n .
3. T o r q u e l o w e r c o n t r o l a r m b a l l s t u d t o s p e c i f i c a t i o n s a n d
i n s t al l c o t t e r pi n.
4. I n s t a l l b r a k e c a l i p e r a s s e m b l y i f r e m o v e d ( s e e s e c t i o n
5).
5. L o w e r t h e v e h i c l e t o t h e floor.
Fig. 3C -26 -L .C .A . Rubber Bushing Installation
FRONT SUSPENSION 3C -1 9
o n p a g e 1 o f t h i s s e c t i o n
o n p a g e 1 o f t h i s s e c t i o n