Fluid Cooler Removal; Installation; Hoses; Removal - Dodge Dakota Sport 2001 Service Manual

AN
FLUID COOLER

REMOVAL

(1) Siphon the power steering system.
(2) Disconnect the return hose at the pump.
(3) Raise and support the vehicle.
(4) Disconnect the return hose at the cooler.
(5) Remove the cooler mounting nut and bolt.
(6) Remove the cooler.

INSTALLATION

(1) Install the cooler.
(2) Install the cooler mounting nut and bolt.
(3) Reconnect the return hose at the cooler.
(4) Remove the support and lower the vehicle.
(5) Reconnect the return hose at the pump.
(6) Refill the power steering system,(Refer to 19 -
STEERING/PUMP - STANDARD PROCEDURE).

HOSES

REMOVAL - RETURN HOSE
(1) Siphon the power steering system.
(2) Raise and support the vehicle.
(3) Disconnect the return hose at the cooler.
(4) Disconnect the return hose at the gear.
(5) Remove the pressure hose from the vehicle.
REMOVAL - PRESSURE HOSE
(1) Siphon the power steering system.
(2) Raise and support the vehicle.
(3) Disconnect the pressure hose at the pump.
(4) Disconnect the pressure hose at the gear.
(5) Remove the pressure hose from the vehicle.
INSTALLATION - RETURN HOSE
(1) Install the return hose to the vehicle.
(2) Reconnect the return hose at the cooler.
Tighten the hose to 34 N·m (25 ft. lbs.).
(3) Reconnect the return hose at the gear. Tighten
the hose to 34 N·m (25 ft. lbs.).
(4) Remove the support and lower the vehicle.
(5) Refill the power steering system,(Refer to 19 -
STEERING/PUMP - STANDARD PROCEDURE).
INSTALLATION - PRESSURE HOSE
(1) Install the pressure hose to the vehicle.
(2) Reconnect the pressure hose at the gear.
Tighten the hose to 34 N·m (25 ft. lbs.).
(3) Reconnect the pressure hose at the pump.
Tighten the hose to 34 N·m (25 ft. lbs.).
(4) Remove the support and lower the vehicle.
(5) Refill the power steering system,(Refer to 19 -
STEERING/PUMP - STANDARD PROCEDURE).
POWER STEERING PRESSURE
SWITCH
DESCRIPTION
A pressure sensing switch (Fig. 6) is included in
the power steering system (mounted on the high-
pressure line). This switch will be used only on vehi-
cles equipped with a 4.7L V–8 engine and power
steering.
Fig. 6 Power Steering Pump Pressure Switch—4.7L
V-8 Engine
1 - HYDRAULIC PUMP
2 - POWER STEERING PRESSURE SWITCH
3 - RACK AND PINION GEAR
4 - OIL COOLER

OPERATION

The power steering pressure switch provides an
input to the Powertrain Control Module (PCM). This
input is provided during periods of high pump load
and low engine rpm; such as during parking maneu-
vers. The PCM will then increase the idle speed
through the Idle Air Control (IAC) motor. This is
done to prevent the engine from stalling under the
increased load.
When steering pump pressure exceeds 3275 kPa
690 kPa (475 psi
switch will open and the PCM will increase the
engine idle speed. This will prevent the engine from
stalling.
When pump pressure drops to approximately 1379
kPa (200 psi), the switch circuit will re-close and
engine idle speed will return to its previous setting.
PUMP
100 psi), the normally closed
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