Dodge D150 1990 Service Manual page 795

1 9 - 1 6 STEERING
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(5) Connect the center l i n k to the p i t m a n (steering)
(6) Remove t h e supports a n d lower t h e vehicle,
a r m . T i g h t e n the r e t a i n i n g n u t w i t h 54 N n n (40 f t -
lbs) torque. I n s t a l l a replacement cotter p i n .
POWER S T E E R I N G G E A R S E R V I C E
INDEX
Page
Power Steering Gear—Initial Operation 38
Power Steering Gear—Removal/Installation 16
Power Steering Gear—Repair Service . . . . . . . . . 17
SERVICE INFORMATION
R a m T r u c k and Ramcharger vehicles are equipped
w i t h a recirculating b a l l , variable r a t i o power steer-
i n g gear. Steel balls r i d i n g i n helical grooves func-
t i o n as a r o l l i n g thread between the wormshaft and
t h e rack piston. Teeth on the side of t h e rack piston
mesh w i t h the sector shaft gear teeth. T h e control
valve is housed inside the steering gear housing, ne-
g a t i n g t h e need for an externally located valve.
I f t h e hydraulic fluid pressure i n the steering sys-
t e m should fail, the driver, b y using more effort to
t u r n t h e steering wheel, can control t h e vehicle
steering manually (i.e., w i t h o u t power assist).
S a f e t y goggles s h o u l d be w o r n at a l l times
w h e n involved w i t h p o w e r steering g e a r or
p u m p service.
POWER STEERING
GEAR-REMOVAL/INSTALLATION
REMOVAL
(1) Place the front wheels i n a straight-ahead posi-
t i o n .
(2) Place a d r a i n pan under the steering gear.
(3) Disconnect t h e f l u i d hoses from t h e steering
gear. Raise and secure the hoses above the reservoir
fluid level to prevent excessive fluid loss. Cap t h e
ends of the hoses to prevent any entry o f foreign ma-
t e r i a l .
(4) Disconnect the steering column shaft f r o m the
stub shaft.
(5) Raise and support the vehicle.
(6) Disconnect t h e center l i n k from t h e p i t m a n
(steering) arm.
(7) Remove t h e p i t m a n (steering) a r m r e t a i n i n g
n u t and washer, m a r k the p i t m a n (steering) a r m and
the p i t m a n shaft positions for i n s t a l l a t i o n reference
and remove the p i t m a n (steering) a r m f r o m the p i t -
m a n shaft w i t h an appropriate puller tool (Fig. 1).
(8) Remove the steering gear r e t a i n i n g bolts at the
frame r a i l and remove the steering gear from the ve-
hicle.
Page
Power Steering Hose—Removal/Installation 38
Service Information
. . .:
16
J8919-11
Fig. 1 Pitman (Steering) Arm Removal
INSTALLATION
(1) Position t h e steering gear a t the frame r a i l , i n -
stall a n d t i g h t e n t h e a t t a c h i n g bolts "finger-tight".
Center t h e steering gear and a l i g n the steering col-
u m n shaft and the stub shaft.
(2) I n s t a l l the bolts i n the steering column shaft-to-
stub shaft coupling and t i g h t e n w i t h 45 N-m (33 f t -
lbs) torque.
(3) I f necessary, re-position the steering gear at the
frame t o e l i m i n a t e any b i n d i n g and t i g h t e n the at-
taching bolts w i t h 136 N-m (100 ft-lbs) torque.
(4) W i t h the p i t m a n (steering) a r m and shaft i n -
stallation reference m a r k s aligned, position the p i t -
m a n (steering) a r m on the p i t m a n shaft.
T h e p i t m a n (steering) a r m n u t a n d l o c k w a s h e r
must b e r e p l a c e d w i t h either e x a c t replacements
(same p a r t n u m b e r s ) , o r w i t h e q u i v a l e n t r e p l a c e -
ments, i f r e p l a c e m e n t i s n e c e s s a r y .
(5) I n s t a l l t h e lockwasher and the r e t a i n i n g n u t on
the p i t m a n shaft and t i g h t e n the n u t w i t h 237 N-m
(175 ft-lbs) torque.