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•
• STEERING
19 - 49
Fig. 13 Pump Shaft Retaining Ring Removal
can be removed w i t h crocus cloth. Replace t h e valve
or pump housing i f either are damaged a n d n o t re-
pairable.
T h e f l o w c o n t r o l v a l v e i s s e r v i c e d
a s a u n i t
o n l y a n d i t m u s t n o t b e d i s a s s e m b l e d .
(3) Inspect t h e capscrew i n t h e end o f t h e flow con-
t r o l valve for tightness. I f loose, t i g h t e n i t w i t h care
to avoid damaging t h e machined surfaces.
(4) Inspect t h e pressure plate and t h e t h r u s t plate
surfaces for flatness and, w h e n installed, ensure t h a t
t h e y w i l l be p a r a l l e l w i t h t h e p u m p r i n g . Inspect a l l
t h e components for cracks a n d scoring ( F i g . 9). Re-
place any component t h a t is defective or damaged.
A h i g h l y p o l i s h e d s u r f a c e a l w a y s e x i s t s o n t h e
p r e s s u r e p l a t e , t h e t h r u s t p l a t e a n d t h e p u m p
r i n g as a r e s u l t o f n o r m a l f r i c t i o n . D o n o t c o n -
f u s e t h i s c o n d i t i o n w i t h s c o r i n g .
(5) Inspect a l l the rotor vanes for ease o f movement
i n t h e rotor slots. Inspect t h e p u m p shaft for w o r n
splines, cracks, and other defects (Fig. 9). Replace a l l
SCREWDRIVER
OIL SEAL
Fig. 14 Pump Seal Removal
excessively w o r n or damaged components. Replace
the discarded pump shaft r e t a i n i n g r i n g ( i t should
not be reused).
(6) Inspect t h e pump housing for wear, cracks, po-
rosity and damage (Fig. 9). Replace t h e p u m p hous-
i n g i f any of the conditions listed exist.
(7) Inspect t h e pressure hose/flow control valve
fit-
t i n g (Fig. 9). I f damaged, replace i t .
(8) Inspect t h e end plate a n d r e t a i n i n g r i n g ( F i g .
9). I f either one is damaged, replace i t . Do not reuse
the r e t a i n i n g r i n g i f i t is bent or distorted. I f the con-
dition is uncertain, replace t h e r e t a i n i n g r i n g .
(9) Inspect t h e bushing a n d t h e seal ( F i g . 9). Re-
place, i f damaged.
(10) Assemble t h e pump according to t h e instruc-
tions provided w i t h i n t h e assembly procedure.
PUMP
ASSEMBLY
CAUTION: Do not allow any foreign objects to enter
the pump housing during assembly. All compo-
nents must be clean and lubricated with power
steering fluid. Install replacement seals, retaining
rings and O-ring seals during assembly. Used, dam-
aged and worn seals will cause leakage, noise and
rapid wear after assembly.
(1) I n s t a l l t h e pump shaft seal w i t h a n appropriate
installation tool (Fig. 15).
(2) Lubricate w i t h petroleum j e l l y a n d i n s t a l l t h e
replacement seal i n the t h i r d groove i n t h e p u m p
housing bore (Fig. 16).
(3) Clamp t h e pump housing i n a vise w i t h t h e
large
bore side facing downward. D o n o t o v e r -
t i g h t e n t h e v i s e j a w s b e c a u s e t h i s w i l l d a m a g e
t h e b e a r i n g .
(4) Insert both dowel pins i n t h e t h r u s t plate.
(5)
Insert t h e splined end o f t h e p u m p
shaft
t h r o u g h t h e t h r u s t plate and t h e rotor, a n d i n s t a l l
the r e t a i n i n g r i n g on t h e end o f the shaft (Figs. 17
and
18). O p e n
t h e r e t a i n i n g r i n g
o n l y
w i d e
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