GEAR
TABLE OF CONTENTS
page
page
GEAR
DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . . 27
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . 27
WARNINGS AND CAUTIONS
. . . . . . . . . . . . . . 27
REMOVAL
REMOVAL - LHD GEAR
. . . . . . . . . . . . . . . . . 27
REMOVAL - RHD GEAR
. . . . . . . . . . . . . . . . 32
INSTALLATION
INSTALLATION - LHD GEAR
. . . . . . . . . . . . . 34
INSTALLATION - RHD GEAR
. . . . . . . . . . . . . 35
SPECIAL TOOLS
POWER STEERING GEAR
. . . . . . . . . . . . . . 36
OUTER TIE ROD
REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . 37
GEAR
DESCRIPTION
This vehicle is equipped with a rack and pinion
power steering gear (Fig. 1). It is mounted to the
underside of the front suspension cradle/crossmem-
ber.
The steering column is attached to the gear
through the use of an intermediate shaft and cou-
plers. The outer ends of the power steering gear’s
outer tie rods connect to the steering knuckles.
NOTE: The power steering gear should NOT be ser-
viced or adjusted unless DaimlerChrysler Corpora-
tion authorizes. If a malfunction or oil leak occurs,
the complete steering gear should be replaced.
Only the outer tie rods may be replaced separately
from the rest of the gear.
OPERATION
Turning of the steering wheel is converted into lin-
ear (side-to-side) travel through the meshing of the
helical pinion teeth with the rack teeth in the steer-
ing gear. This travel pushes and pulls the tie rods to
change the direction of the vehicle’s front wheels.
Power assist steering provided by the power steer-
ing pump is controlled by an open center, rotary type
control valve which directs oil from the pump to
either side of the integral rack piston upon demand.
Road feel is controlled by the diameter of a torsion
bar which initially steers the vehicle. As required
steering effort increases, as in a turn, the torsion bar
twists, causing relative rotary motion between the
rotary valve body and the valve spool. This move-
ment directs oil behind the integral rack piston
which, in turn, builds hydraulic pressure and assists
in the turning effort.
Manual steering control of the vehicle can be main-
tained if power steering assist is lost. However,
under this condition, steering effort is significantly
increased.
WARNINGS AND CAUTIONS
WARNING:
POWER
STEERING
FLUID,
ENGINE
PARTS
AND
EXHAUST
SYSTEM
MAY
BE
EXTREMELY HOT IF ENGINE HAS BEEN RUNNING.
DO NOT START ENGINE WITH ANY LOOSE OR DIS-
CONNECTED HOSES. DO NOT ALLOW HOSES TO
TOUCH HOT EXHAUST MANIFOLD OR CATALYST.
WARNING: FLUID LEVEL SHOULD BE CHECKED
WITH THE ENGINE OFF TO PREVENT PERSONAL
INJURY FROM MOVING PARTS.
CAUTION: When the system is open, cap all open
ends of the hoses, power steering pump fittings or
power steering gear ports to prevent entry of for-
eign material into the components.
REMOVAL
REMOVAL - LHD GEAR
(1) Remove cap from power steering fluid reser-
voir.
(2) Using a siphon pump, remove as much fluid as
possible from the power steering fluid reservoir. Use
care not to damage the filter mesh below the
fluid surface.
RS
GEAR
19 - 27