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STEERING
•
I f t h e front t i r e t r e a d b e c o m e s w o r n , t h e steer-
i n g e f f o r t w i l l i n c r e a s e b e c a u s e o f t h e d e c r e a s e
i n s u r f a c e f r i c t i o n .
STEERING
LINKAGE
DESCRIPTION—2WD VEHICLES
The steering l i n k a g e for 2 W D vehicles (Fig. 3) con-
sists o f a steering gear p i t m a n a r m , a center l i n k ,
t w o t i e rods ( w i t h removal and adjustable ends), a n d
a n idler a r m . T h e adjustment sleeves a t the tie-rod
ends provide for "toe" position adjustment. T h e t i e
rod threaded-ends have r i g h t - h a n d threads to accept
the adjustment sleeve.
TIE
Fig. 3 Steering Linkage—2WD Vehicles
The center l i n k is connected to the p i t m a n a r m a t
one end and to the idler a r m at the opposite end. The
inner tie-rod ends are connected to t h e center l i n k
and the outer tie-rod ends are connected to the steer-
i n g knuckle arms (Fig. 3).
MANUAL STEERING
GEAR
DESCRIPTION
The m a n u a l steering gears ( F i g . 4) installed i n
Ram T r u c k and Ramcharger vehicles are designed t o
provide easy steering w i t h m i n i m u m friction w i t h i n
the steering gear. A r e c i r c u l a t i n g b a l l n u t travels u p
and down on a wormshaft t h a t is supported by recir-
c u l a t i n g balls, w h i c h function as the w o r m (screw)
thread. The wormshaft and b a l l n u t are supported i n
the steering gear housing b y a n adjustable, b a l l -
t h r u s t type upper and lower bearing.
POWER STEERING
GEAR
DESCRIPTION
The power steering gear is comprised of a gear
housing t h a t contains a p i t m a n (sector) shaft w i t h
sector gear, a power piston w i t h gear teeth t h a t are
"broached" into the side of the piston (which are i n
WORMSHAFT
ADJUSTER PLUG
Fig. 4 Manual Steering Gear
constant mesh w i t h t h e pitman/sector shaft gear
teeth), and a wormshaft t h a t connects t h e steering
column shaft to t h e power piston v i a a fabric and
rubber coupler.
The steering valve, located o n top of the steering
gear, directs t h e flow of f l u i d i n the steering gear.
F l u i d i s supplied t o the steering gear b y a belt (en-
gine) d r i v e n , constant displacement, vane-type p u m p
v i a a h i g h pressure hose. F l u i d is r e t u r n e d to t h e
pump reservoir f r o m the steering gear v i a a low pres-
sure, r e t u r n hose.
BUILD DATE
The steering gear b u i l d date code is stamped i n t o
the p i t m a n (sector) shaft adjustment screw combina-
t i o n a l u m i n u m gasket and date tag w i t h a four d i g i t
number. T h e first three digits represent the day of
the year. T h e f o u r t h d i g i t represents the year. F o r
example, b u i l d date code 2908 means the 290th day
(i.e., Oct. 16) o f 1989.
POWER STEERING
PUMP
DESCRIPTION
H y d r a u l i c f l u i d pressure is provided for operation
of the power steering gear by a belt d r i v e n power
steering p u m p (Fig. 2). The power steering pump is a
constant displacement, vane-type pump. The pump
housing and t h e i n t e r n a l components are combined
w i t h t h e reservoir to form a one-piece mechanism.
The " h a m c a n " shaped, i n t e g r a l reservoir has a pres-
sure hose attachment located at t h e rear of t h e
pump. The power steering pump is connected to the
steering gear v i a a h i g h pressure hose and a l o w
pressure,
r e t u r n
hose.
The pump
shaft
has a
"pressed-on" p u l l e y t h a t is belt driven by the crank-
shaft pulley.
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