chevrolet truck Light Duty Truck 1994 Series, Repair Manual

Page: 47 / 919

5. W h e n c o il is f u lly s e a t e d o n th e f r o n t h e a d , u se a 1/8"
d i a m e t e r d r if t p u n c h a n d s t a k e th e f ro n t h e a d at t h r e e
p l a c e s 12 0 d e g r e e s a p a r t ( F ig . 16), to e n s u r e c lu t c h coil
r e m a i n s in p o s i t i o n .
• S t a k e s iz e s h o u l d b e o n l y o n e - h a l f th e a r e a o f th e
p u n c h
t ip a n d b e o n l y a p p r o x i m a t e l y
0 . 2 8 - 0 . 3 5 m m ( . 0 1 0 - 0 1 5 " ) d e e p ( F ig . 17).
6. I n s ta ll r o t o r a n d b e a r i n g a s s e m b l y a n d t h e c lu t c h p late
a n d h u b a s s e m b l y a s d e s c r i b e d p r e v i o u s l y .
MAJOR COMPRESSOR REPAIR
PROCEDURES
W h e n r e p l a c i n g th e s h a f t se al a s s e m b l y (F ig . 18),
p r e s s u r e r e l i e f v a lv e o r c o n t r o l s w i t c h e s ( F ig . 19), it will be
n e c e s s a r y t o r e c o v e r th e r e f r i g e r a n t . O t h e r t h a n c lu t c h r e p a i r
p r o c e d u r e s , th e s a m e h o l d s tr u e f o r a n y d i s a s s e m b l y o f the
c o m p r e s s o r .
A c l e a n w o r k b e n c h c o v e r e d w i t h a s h e e t o f c le a n p ap er,
a n d a p l a c e ( c l e a n t r a y s , e tc .) f o r all p a r ts b e i n g r e m o v e d a n d
r e p l a c e d is i m p o r t a n t , a s is t h e u s e o f p r o p e r c l e a n s e r v i c e to ols .
NOTICE:
A n y a t t e m p t to u s e m a k e s h i f t o r
i n a d e q u a t e s e r v i c e t o o ls o r e q u i p m e n t m a y result in
d a m a g e a n d / o r i m p r o p e r c o m p r e s s o r o p e r a t i o n .
A ll p a r ts r e q u i r e d f o r s e r v i c i n g t h e i n te r n a l c o m p r e s s o r
a r e p r o t e c t e d b y a p r e s e r v a t i v e p r o c e s s a n d p a c k a g e d in a
m a n n e r w h i c h w ill e l i m i n a t e t h e n e c e s s i t y o f c le a n i n g ,
w a s h i n g o r f l u s h i n g o f t h e p a r ts . T h e p a r ts c a n b e u s e d in the
i n te r n a l a s s e m b l y j u s t a s t h e y a r e r e m o v e d f r o m th e s e r v i c e
p a c k a g e .
Seals and protective packaging should be left
intact until just prior to installation.
I f t h e c o m p r e s s o r r e a r h e a d , f r o n t h e a d o r c y l i n d e r a n d
s h a f t a s s e m b l y is to b e s e r v i c e d o r r e p l a c e d , t h e oil in the
c o m p r e s s o r m u s t b e d r a i n e d , m e a s u r e d , r e c o r d e d a n d r e p la c e d .
COMPRESSOR SHAFT SEAL
REPLACEMENT
Seal Leak Detection
A s h a f t se a l s h o u l d not be c h a n g e d b e c a u s e o f s m a ll
a m o u n t s o f oil f o u n d o n a n a d j a c e n t s u r f a c e b u t o n l y a f t e r
a ctu al r e f r i g e r a n t l e a k a g e is f o u n d u s i n g an a p p r o v e d lea k
d ete cto r, J 3 9 4 0 0 o r e q u i v a l e n t .