Dodge D150 1990 Service Manual page 810

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STEERING 19-31
spool valve locating hole is either cracked, exces-
sively w o r n or broken, replace t h e complete valve
body. S m a l l flat s p o t s o n e i t h e r side o f t h e s t u b
s h a f t l o c a t i n g p i n h e a d a r e n o r m a l a n d a c c e p t -
a b l e .
(2) I f t h e stub shaft ground surfaces has scores,
nicks or b u r r s t h a t cannot be removed w i t h crocus
cloth, replace t h e complete valve body. Inspect t h e
outside surface area o f the spool valve and t h e inside
surface area o f t h e valve body for nicks, b u r r s and
wear. S l i g h t wear is n o r m a l on t h e valve m a t i n g sur-
faces. I f a n y s e r i o u s defects c a n n o t b e r e m o v e d
w i t h c r o c u s c l o t h , r e p l a c e t h e c o m p l e t e v a l v e
b o d y .
(3) I f t h e s m a l l notch i n t h e s k i r t of the valve body
is excessively w o r n , replace t h e complete valve body
(Fig. 23).
NOTCH
VALVE
BODY
J 8 9 1 9 - 4 7
Fig. 23 Valve Body Inspection
(4) L u b r i c a t e t h e spool valve w i t h power steering
fluid and check t h e f i t of the spool valve i n t h e valve
body w i t h o u t t h e spool valve dampener O-ring seal
installed. I f t h e spool valve does n o t rotate easily
w i t h i n t h e valve body, replace t h e complete valve
body.
VALVE BODY AND STUB SHAFT—ASSEMBLY
(1) L u b r i c a t e t h e replacement i n n e r O-ring seals
and t h e teflon rings (Fig. 24) w i t h power steering
fluid.
(2) I n s t a l l t h e i n n e r O-ring seals i n t h e valve body
r i n g grooves (Fig. 25) a n d i n s t a l l the teflon rings o n
top o f t h e O-ring seals. U s e c a r e t o a v o i d d a m a g -
i n g t h e t e f l o n r i n g s d u r i n g i n s t a l l a t i o n .
DAMPER
O-RING
SEAL
TEFLON
RINGS (3)
STUB
SHAFT
O-RING
SEAL
SPOOL
VALVE
O-RING
SEALS (3)
VALVE
BODY
J 8 9 1 9 - 4 6
Fig. 24 Valve Body & Stub Shaft Assembly
J 8 9 1 9 - 4 8
Fig. 25 O-Ring Seal Installation
T h e t e f l o n r i n g s c a n a p p e a r s l i g h t l y d i s t o r t e d
w h e n f i r s t i n s t a l l e d ; h o w e v e r , d u r i n g o p e r a t i o n ,
h o t p o w e r s t e e r i n g fluid w i l l cause t h e m t o
s t r a i g h t e n o u t .
(3) Lubricate t h e spool valve dampener O-ring seal
w i t h petroleum j e l l y and i n s t a l l i t i n t h e spool valve
groove (Fig. 24).
(4) Lubricate t h e spool valve and valve body w i t h
power steering fluid and carefully insert t h e spool
valve i n t h e valve body (Fig. 24).