Chevrolet 1980 Light Duty Truck Repair Manual page 59

5. R E M O V E A N D IN S T A L L R A C K P IS T O N A N D
V A L V E A S S E M B L Y
REMOVE
1
. R e m o v e parts as
s how n. Push on
stub shaft. D O N O T
rem ove upper bearing
a s s e m b ly (see stub
shaft sea l rem oval)
H O U S IN G A S S E M B L Y
R ack piston teeth
■VALVE A S S E M B L Y
•W O R M A S S E M B L Y
R A C K -P IS T O N -N U T
6. R EM O V E A N D IN S TA LL VALVE A N D W O R M
A S S E M B LY F R O M R A C K P IS TO N
REMOVE
1. U n s cre w v alv e and w orm
from rack.
2. R em o v e teflon ring and
rack piston " O " ring from
rack piston.
VALVE A N D W O R M A S S E M B L Y
c. Turn w orm and valve clockw ise
to c o m p le te a s s e m b ly ----------------
B C h e ck relation of stub shaft and rack piston
a. S c re w w orm and valve into
rack piston until valve face
and rack piston face are
f lu s h ________ _ __________
b. W ith rack piston in position show n,
flats on stub shaft and piston a re to be
parallel. If not parallel, d isa s s em b le and re p e a t
INSTALL
1. Install parts as
shown. M a ke sure
rack piston teeth
are positioned toward
side cover opening.
Side cover
opening
^ S T U B S H A F T
INSTALL
1
.
Install ' O ' ring and
teflon ring as show n.
2
,
S crew worm and valve
into rack piston
S e e p ro cedure below.
S T U B S H A F T
\
\
A. abo v e
Fig. 3B 3 -3C -O ve rhau l 6 0 5 Gear, Chart C
7. R E M O V E A N D IN S TA LL VALVE
A S S E M B LY F R O M W O R M A SS E M B LY
REMOVE
1
R em o v e parts as 1. Install parts as show n
shown.
VALVE A S S E M B L Y -
W O R M
S H A F T T O W O R M R E T A IN IN G
A ss e m b le w orm to valve
R E T A IN IN G R IN G — Install with-
curved in end on s am e side as
a ccess hole.
W O R M A S S E M B L Y
8. D IS A S S E M B L E A N D A S S E M B L E VALVE
DISASSEMBLE
1. D is a s s e m b le parts
as show n.
VALVE B O D Y O " R IN G
V A LVE B O D Y ---------
VALVE S P O O L ^ T ^ \
- 7
S T U B S H A F T \
S P O O L TO B O D Y " O " R IN G
A. Loosen shaft cap B. R em o v e and install stub shaft.
Tap lightly on
w o o d b lo c k
^
C. R e m o v e and install spool
R o ta te w h ile
rem oving or
in s ta llin g ------
Lu bricate spool a nd body
with pow er steerin g fluid.
STEERING 3B-9
INSTALL
S e e below.
■ R e ta in in g ring
a c c e s s h o le
S H A F T T O W O R M
"O " R IN G SEAL
R IN G
R etain ing ring access hole-
ASSEMBLE
2. A ss e m b le parts
as show n.
- ^ V A L V E B O D Y
R IN G (teflon)
6 4
Pull cap out approx. m m (V ")
i /
P |n on shaft and hole in
spool ( Dis e n g a g e to re m o v e )
| D. E ng ag e stub shaft
\ v . ,
I r .. T
N otch m ust fully e n g a g e
pin and cap m ust s ea t
a gainst shoulder.
OVERHAUL MANUAL