Chrysler New Yorker. Manual — part 273
(14) Install the master cylinder on the vacuum
booster. Install the 2 nuts attaching the master cyl-
inder to the vacuum booster. Tighten the master cyl-
inder mounting nuts to a torque of 28 N·m (250 in.
lbs.).
(15) Remove the clamp from the steering wheel
(Fig. 21).
(16) Install the intermediate shaft onto the steer-
ing column shaft. Install steering column coupler
pinch bolt (Fig. 22) and tighten to a torque of 28 N·m
(21 ft. lbs.). Install the pinch bolt nut retaining pin in
pinch bolt.
(17) Install the reinforcement (Fig. 19) on the vehi-
cle. Install the 8 bolts, attaching the reinforcement
(Fig. 19) to the strut towers. Install the bolt (Fig. 19)
attaching the wiper module to the reinforcement.
(18) Install the in-line resonator and inlet hose
(Fig. 20) on the throttle body and air let hose coming
from the lid of the air cleaner housing.
(19) Install the covers (Fig. 18) over the wiper
module and the cowl. Install and securely tighten the
attaching screws.
(20) Install the wiper arms (Fig. 17) on the pivots.
Install and securely tighten the wiper arm to pivot
attaching nuts. Install the caps on the wiper arms
covering the pivot nuts.
(21) Install the battery ground cable onto the
ground stud on the shock tower.
CAUTION: Do not use automatic transmission fluid.
Use only the proper Mopar Power Steering Fluid or
equivalent when filling the power steering fluid res-
ervoir.
(22) Perform Power Steering Pump Initial Opera-
tion procedure which can be found in the Power
Steering Pump section of this group to properly refill
and bleed power steering system.
(23) Lower vehicle.
(24) Adjust front toe if necessary. Refer to Suspen-
sion, Group 2, for the required procedure.
POWER STEERING FLUID PRESSURE SWITCH
(2.7L ENGINE)
REMOVE
(1) Remove the battery ground cable from the
ground stud on the shock tower and isolate it cable
by installing the cable isolator on the ground stud
(Fig. 34).
(2) Remove the wire harness connector on from the
power steering pressure switch (Fig. 35).
(3) Remove the power steering pressure switch
from the power steering pressure hose (Fig. 35).
INSTALL
(1) Install the power steering pressure switch into
the power steering pressure hose (Fig. 35). Tighten
the pressure switch to a torque of 16 N·m (140 in.
lbs.).
(2) Connect the wire harness connector.
(3) Connect the battery ground cable to the ground
stud located on the strut tower.
POWER STEERING FLUID PRESSURE SWITCH
(3.2L/3.5L ENGINE)
REMOVE
(1) Remove the battery ground cable from the
ground stud on the shock tower and isolate it cable
by installing the cable isolator on the ground stud
(Fig. 36).
(2) Raise the vehicle. See Hoisting in the Lubrica-
tion And Maintenance section of this manual.
Fig. 34 Correctly Isolated Remote Ground Cable
Fig. 35 Power Steering Pressure Switch Location
300M
STEERING
19 - 17
REMOVAL AND INSTALLATION (Continued)
(3) Remove the wire harness connector on from the
power steering pressure switch (Fig. 37).
(4) Remove the power steering pressure switch
from the power steering pump (Fig. 37).
INSTALL
(1) Install the power steering pressure switch (Fig.
37). Tighten the pressure switch to a torque of 16
N·m (140 in. lbs.).
(2) Connect the wire harness connector.
(3) Lower the vehicle.
(4) Connect the battery ground cable to the ground
stud located on the strut tower.
(5) Check and adjust fluid level as necessary.
SPECIFICATIONS
POWER STEERING FASTENER TORQUE
SPECIFICATIONS
DESCRIPTION
TORQUE
POWER STEERING GEAR:
Crossmember Bolts . . . . . . . . . 58 N·m (43 ft. lbs.)
Tie Rod Steering Arm Nut . . . 37 N·m (27 ft. lbs.)
Tie Rod Steering Gear Bolt . . . 82 N·m (60 ft. lbs.)
Tie Rod Adjuster Pinch bolt . . 45 N·m (33 ft. lbs.)
POWER STEERING FLUID HOSES:
Hose Tube Nuts . . . . . . . . . . . 47 N·m (35 ft. lbs.)
POWER STEERING PRESSURE SWITCH:
Power Steering Pressure Switch . . . . . . . 22 N·m
(200 in. lbs.)
POWER STEERING PUMP:
Discharge Fitting . . . . . . . . . . 84 N·m (62 ft. lbs.)
Mounting Bolts . . . . . . . . . . . 28 N·m (250 in. lbs.)
POWER STEERING FLUID RESERVOIR:
Mounting Bolt-2.7L Pulley Side . . . . . . . . 13 N·m
(115 in. lbs.)
Mounting Bolts-2.7L Rear . . 24 N·m (212 in. lbs.)
Mounting Screw-3.2L/3.5L . . 12 N·m (105 in. lbs.)
SPECIAL TOOLS
POWER STEERING
Fig. 36 Correctly Isolated Remote Ground Cable
Fig. 37 Power Steering Pressure Switch Location
Power Steering Analyzer 6815
Adapters, Power Steering Analyzer 6893
19 - 18
STEERING
300M
REMOVAL AND INSTALLATION (Continued)
POWER STEERING PUMP
INDEX
page
page
DESCRIPTION AND OPERATION
POWER STEERING PUMP . . . . . . . . . . . . . . . . . 19
SERVICE PROCEDURES
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 20
REMOVAL AND INSTALLATION
POWER STEERING FLUID RESERVOIR
(3.2L/3.5L Engine) . . . . . . . . . . . . . . . . . . . . . . 24
POWER STEERING PUMP (2.7L ENGINE) . . . . . 20
POWER STEERING PUMP (3.2L/3.5L ENGINE) . . 22
DISASSEMBLY AND ASSEMBLY
POWER STEERING FLUID RESERVOIR (2.7L
ENGINE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
POWER STEERING PUMP PRESSURE FITTING
SEAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
POWER STEERING PUMP PULLEY . . . . . . . . . . 25
SPECIFICATIONS
TORQUE SPECIFICATIONS . . . . . . . . . . . . . . 27
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . 27
SPECIAL TOOLS
POWER STEERING PUMP . . . . . . . . . . . . . . . . . 28
DESCRIPTION AND OPERATION
POWER STEERING PUMP
Hydraulic pressure for the operation of the power
steering system is provided by a belt driven power
steering pump. The power steering pump is a con-
stant flow rate and displacement vane type pump.
Vehicles equipped with the 2.7 liter engine use a
power steering pump that uses an integral reservoir
for
the
power
steering
fluid
(Fig.
1).
Vehicles
equipped with the 3.2 liter or 3.5 liter engine use a
power steering pump (Fig. 2) that has a remotely
mounted reservoir for the power steering fluid. Power
steering fluid from the remote reservoir is supplied to
the power steering pump through a hose connecting
the power steering pump to the reservoir. Also, the
power steering system uses a power steering pres-
sure switch which is integral to the power steering
pump on 3.2 and 3.5 liter engines. It is part of the
quick connect tube assembly in the power steering
pressure hose on 2.7 liter engines.
Because of unique flow control levels, or
pump displacements, power steering pumps
may be used only on specific vehicle applica-
tions. Be sure that the pump is only replaced
with a pump that is the correct replacement for
that specific application.
The service procedures for the power steering
pump are limited to the areas and components listed
below.
• Power steering fluid reservoirs, related compo-
nents and attaching hardware.
• Power steering fluid reservoir filler cap.
• Power steering pump pulley.
Fig. 1 Power Steering Pump (2.7L Engine)
Fig. 2 Power Steering Pump (3.2L/3.5L Engine)
300M
STEERING
19 - 19
No repair procedures are to be done on the internal
components of the power steering pump. Repair of a
power steering fluid leak from any area of the power
steering pump is not allowed.
The Power steering pump operates as follows. A
belt driven pulley turns a shaft which drives a rotor.
Rectangular pumping vanes carried by the shaft
driven rotor move the fluid from the intake to the
cam ring pressure cavities. As the rotor begins to
turn, centrifugal force throws the vanes against the
inside surface of the cam ring to pickup residual oil.
This oil is then forced into the high pressure area. As
more oil is picked up by the vanes, the additional oil
is forced into the cavities of the thrust plate through
two crossover holes in the cam ring and pressure
plate. The crossover holes empty into the high pres-
sure area between the pressure plate and the hous-
ing end cover.
When the high pressure area of the power steering
pump is filled with power steering fluid, the fluid
flows under the vanes in the rotor slots, forcing the
vanes to follow the inside oval surface of the cam
ring. As the vanes reach the restricted area of the
cam ring, oil is forced out from between the vanes.
When excess oil flow is generated during high-speed
operation, a regulated amount of oil returns to the
pump intake side through a flow control valve. The
flow control valve reduces the power required to
drive the pump and holds down temperature build-
up.
When steering conditions exceed maximum pres-
sure requirements, such as turning the wheels
against the stops, the pressure built up in the steer-
ing gear also exerts pressure on the spring end of the
flow control valve. The end of the valve houses the
pressure relief valve. High pressure lifts the relief
valve ball from its seat and allows oil to flow through
a trigger orifice located in the outlet fitting. This
reduces pressure on the spring end of the flow con-
trol valve which then opens and allows the oil to
return to the intake side of the pump. This action
limits maximum pressure output of the pump to a
safe level.
Under normal power steering pump operating con-
ditions, the pressure requirements of the pump are
below maximum, causing the pressure relief valve to
remain closed.
In the event of a power steering pump drive belt
failure, manual steering control of the vehicle can
still to be maintained. However, under these condi-
tions, steering effort will significantly increase.
SERVICE PROCEDURES
POWER STEERING PUMP INITIAL OPERATION
CAUTION: The fluid level should be checked with
engine off to prevent injury from moving compo-
nents. Use only Mopar
T
Power Steering Fluid. Do
not use automatic transmission fluid. Do not over-
fill.
Wipe the power steering fluid reservoir and filler
cap clean. Check the level of the power steering fluid
in the reservoir. The power steering fluid level should
be between MAX. COLD and MIN. COLD when the
fluid is at a normal ambient temperature of approxi-
mately 32°C to 43°C (90°F to 110°F).
(1) Fill the pump fluid reservoir to the proper level
and let the fluid settle for at least two (2) minutes.
(2) Start the engine and let run for a few seconds.
Then turn the engine off.
(3) Add fluid if necessary. Repeat the above proce-
dure until the fluid level remains constant after run-
ning the engine.
(4) Raise the front wheels off the ground.
(5) Start the engine. Slowly turn the steering
wheel right and left, lightly contacting the wheel
stops for less than 2 seconds at a time.
(6) Add power steering fluid if necessary.
(7) Lower the vehicle and turn the steering wheel
slowly from lock to lock.
(8) Stop the engine. Check the fluid level and refill
as required.
(9) If the fluid is extremely foamy, allow the vehicle
to stand a few minutes and repeat the above procedure.
(10) Lower the vehicle.
REMOVAL AND INSTALLATION
POWER STEERING PUMP (2.7L ENGINE)
Cap all open ends of the power steering fluid
hoses. This will prevent the entry of foreign material
into the components when power steering hoses are
removed.
WARNING: POWER STEERING OIL, ENGINE COM-
PONENTS AND THE EXHAUST SYSTEM MAY BE
EXTREMELY HOT IF ENGINE HAS BEEN RUNNING.
DO NOT START ENGINE WITH ANY LOOSE OR DIS-
CONNECTED HOSES OR DRIVE BELTS. DO NOT
ALLOW HOSES TO TOUCH HOT EXHAUST MANI-
FOLD OR CATALYST.
19 - 20
STEERING
300M
DESCRIPTION AND OPERATION (Continued)
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