GMC 1989 Light Duty Truck Repair Manual page 127

8. DISASSEMBLE AND ASSEMBLE RACK
PISTON
DIS A SS E M B LE
1. D is a s s e m b le p a rts 1
as sh o w n
2 C le a n and in s p e ct
NOTICE:
all p a rts for
b a lls are s m a lle r than the
e x c e s s iv e w ear
silv e r b a lls T he b la ck
an d silv e r b a lls m ust be
in sta lle d alte rnately into
the ra c k -p isto n and
return g u id e to m ain tain
rack p isto n to w o rm gear
p relo a d
r T E F L O N S E A L A N D 0 R IN G —
If re p la ce d lu b ric a te new seal
and 'O ' ring w ith p ow er
ste erin g flu id
Turn w orm un til w orm g ro o v e
is a lig n e d w ith the low er
b all return g u id e ho le
B e fo re a s s e m b lm g ra c k
in h o u sin g , b all retainer
J-21552 m ust be in se rte d
into rack to a llo w
rem oval of w orm
Figure 2 6 — R em o vin g and Installing th e R ack Piston and P itm an S haft Seals and Bearing
ASSEMBLE
A s s e m b le p arts
as show n.
T he b la c k
W O R M — S lid e all the way
L u b ric a te b a lls with
p ow er ste erin g fluid.
Install balls, th rou g h
b all return g u id e hole,
w h ile rotating w orm
c o u n te rc lo c k w is e
G U ID E — A ltern ately
install rem a in d er of
b a lls and retain with
g rease at each
end of g uid e
C L A M P
S C R E W -T ig h te n
to 5 Newton Metres
(4 Ft. Lbs.)
POWER STEERING 3B3-13
9. REMOVE AND INSTALL PITMAN SHAFT
SEALS AND BEARING
REMOVE
1 Coat seal lip and washer face
1. Clean end of housing
thoroughly to prevent dirt
from entering and be
2
extrem ely careful not to
score the housing bore.
2. U se screw driver to
remove pitman shaft
dust seal.
3. R em ove retaining ring
with snap ring pliers N E E D L E B E A R IN G
J-4245.
R em o ve o nly if it
4. Using screw driver, pry
needs re p la cin g
seals and w ashers
from bore.
S E A L B A C K -U P
W A S H E R
PITM AN S H A F T
D U S T S E A L
r~
J
R em o vin g b ea rin g
r
W hen tool b otto m s on
h o u sin g b earin g is
fu lly in s ta lle d .------------
i
L ______________ ,________ I_______________________
Install P itm an shaft bearing.
INSTALL
with anhydrous calcium grease.
Install parts as show n
H O U SIN G A S S E M B L Y
Inspect for b urrs
RETAINING
RING
P ITM AN S H A F T S E A L -
J
Install Pitm an shaft seals.
F-06803