Major Compressor Repair Procedures; Compressor Shaft Seal Replacement; Seal Leak Detection - GMC T Series 1994 Repair Manual

5. W h e n c oil is fully s e a te d on the f ro n t h e a d , use a 1/8"
d i a m e t e r drift p u n c h a n d s t a k e the front h e a d at th ree
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 tc h coil
r e m a i n s in p o s i t io n .
• S t a k e siz e s h o u l d be o n l y o n e - h a l f the a r e a o f the
p u n c h tip a n d
0 . 2 8 - 0 . 3 5 m m ( . 0 1 0 - 0 1 5 " ) d e e p (F ig . 17).
6. In stall 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 th e c lu tc h plate
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 re v io u s ly .
MAJOR COMPRESSOR REPAIR
PROCEDURES
W h e n r e p l a c i n g the
p r e s s u r e r e l i e f v a lv e o r c o n tr 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 to r e c o v e r th e r e fr i g e r a n t . O t h e r t h a n c lu tc h re p a ir
p r o c e d u r e s , the s a m e h o l d s tru 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 le a n w o r k b e n c h c o v e r e d w ith a sh e e t o f c le a n paper,
a n d a p l a c e (c le a n t r a y s , e tc .) fo r all p a rts b e i n g r e m o v e d a nd
r e p l a c e d is i m p o r t a n t, a s is th e u se o f p r o p e r c le a n s e r v ic e tools.
NOTICE:
A n y a t t e m p t
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 io n .
All p a r ts r e q u i r e d fo r s e r v i c i n g th 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 will e l i m i n a t e
w a s h i n g o r f l u s h i n g o f th e pa rts. T h e p a r ts c a n be u se d in the
in te rn al a s s e m b l y j u s t a s th e y a r e r e m o v e d f r o m the se rv ice
Seals and protective packaging should be left
p a c k a g e .
intact until just prior to installation.
I f th e c o m p r e s s o r r e a r h e a d , f ron t h e a d o r c y li n d e r an d
s h a ft 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 la c e d , th e oil in the
c o m p r e s s o r m u s t be 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 ce d .
b e o n l y a p p r o x i m a t e l y
sh a ft se al a s s e m b l y (Fig.
to u se m a k e s h i f t
th e n e c e s s i t y o f c le a n in g ,
18),
o r
COMPRESSOR SHAFT SEAL
REPLACEMENT

Seal Leak Detection

A sh a ft seal s h o u l d not be c h a n g e d b e c a u s e o f sm a ll
a m o u n t s o f oil fo u n d o n a n a d j a c e n t s u r f a c e bu t o n l y a f te r
a ctual r e f r i g e r a n t l e a k a g e is fo u n d u s in g an a p p r o v e d leak
detector, J 3 9 4 0 0 o r e q u i v a l e n t .