Dodge Dakota (ND). Manual — part 890
4.7L V-8
The throttle shaft end of throttle body (5) slides into a
socket in TPS (4). The TPS must be installed so that it
can be rotated a few degrees. If sensor will not rotate,
install sensor with throttle shaft on other side of socket
tangs. The TPS will be under slight tension when
rotated.
1. Install TPS and two retaining bolts.
2. Tighten bolts to 7 N·m (60 in. lbs.) torque.
3. Manually operate throttle control lever by hand to
check for any binding of TPS.
4. Connect TPS electrical connector to TPS.
5. Install air duct/air box to throttle body.
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FUEL INJECTION
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STEERING
TABLE OF CONTENTS
page
page
STEERING
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POWER STEERING FLOW AND PRESSURE
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STEERING
DESCRIPTION
Power steering systems consist of:
•
Steering column
•
Rack and pinion steering gear
•
Intermediate Shaft
•
Belt driven hydraulic steering pump
•
Pump pressure and return hoses
•
Oil Cooler
OPERATION
The steering column shaft is attached to the gear pinion. The rotation of the pinion moves the gear rack from side-
to-side. This lateral action of the rack pushes and pulls the tie rods to change the direction of the front wheels.
Power assist is provided by an engine mounted hydraulic pump, the pump supplies hydraulic fluid pressure to the
steering gear. Some vehicles are equipped with an oil cooler mounted in front of Radiator..
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STEERING
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DIAGNOSIS AND TESTING
POWER STEERING SYSTEM
There is some noise in all power steering systems. One of the most common is a hissing sound evident at a
standstill parking. Or when the steering wheel is at the end of it’s travel. Hiss is a high frequency noise similar
to that of a water tap being closed slowly. The noise is present in all valves that have a high velocity fluid passing
through an orifice. There is no relationship between this noise and steering performance.
STEERING NOISE
CONDITION
POSSIBLE CAUSES
CORRECTION
OBJECTIONAL HISS OR
WHISTLE
1. Steering intermediate shaft to dash panel
seal.
1. Check and repair seal at dash
panel.
2. Noisy valve in power steering gear.
2. Replace steering gear.
RATTLE OR CLUNK
1. Gear mounting bolts loose.
1. Tighten bolts to specification.
2. Loose or damaged suspension
components.
2. Inspect and repair suspension.
3. Internal gear noise.
3. Replace steering gear.
4. Pressure hose in contact with other
components.
4. Reposition hose.
5. Loose or damaged intermediate shaft or
column.
5. Inspect and repair or replace.
CHIRP OR SQUEAL
1. Loose belt.
1. Adjust or replace.
2. Loose Pump
2. Check Pump Bolts
3. Pulley Loose or Bent
3. Check Pulley or Replace
WHINE OR GROWL
1. Low fluid level.
1. Fill to proper level.
2. Pressure hose in contact with other
components.
2. Reposition hose.
3. Internal pump noise.
3. Replace pump.
SUCKING AIR SOUND
1. Loose return line clamp.
1. Replace clamp.
2. O-ring missing or damaged on hose
fitting.
2. Replace o-ring.
3. Low fluid level.
3. Fill to proper level.
4. Air leak between pump and reservoir.
4. Repair as necessary.
5. Reservoir cap not installed correctly.
5. Install reservoir cap correctly.
SCRUBBING OR
KNOCKING
1. Wrong tire size.
1. Verify tire size.
2. Wrong gear.
2. Verify gear.
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STEERING
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BINDING AND STICKING
CONDITION
POSSIBLE CAUSE
CORRECTION
DIFFICULT TO TURN WHEEL
STICKS OR BINDS
1. Low fluid level.
1. Fill to proper level.
2. Tire pressure.
2. Adjust tire pressure.
3. Steering components (ball
joints/tie rod ends).
3 Inspect and repair as necessary.
4. Loose belt.
4. Adjust or replace.
5. Low pump pressure.
5. Pressure test and replace if
necessary.
6. Column shaft coupler binding.
6. Replace coupler.
7. Steering gear worn.
7. Replace gear.
INSUFFICIENT ASST. OR POOR RETURN TO CENTER
CONDITION
POSSIBLE CAUSE
CORRECTION
HARD TURNING OR MOMENTARY
INCREASE IN TURNING EFFORT
1. Tire pressure.
1. Adjust tire pressure.
2. Low fluid level.
2. Fill to proper level.
3. Loose belt.
3. Adjust or replace.
4. Low pump pressure.
4. Pressure test and repair as
necessary.
5. Internal gear leak.
5. Replace gear.
STEERING WHEEL DOES NOT
WANT TO RETURN TO CENTER
POSITION
1. Tire pressure.
1. Adjust tire pressure.
2. Wheel alignment.
2. Align front end.
3. Lack of lubrication.
3. Inspect and lubricate suspension
compnents.
4. High friction in steering gear.
4. Replace gear.
5. Intermediate Shaft Binding.
5. Check Intermediate Shaft
Replace if needed.
6. Steering Column Friction High.
6. Check Steering Column, Replace
as needed.
7. High Steering System Friction.
7. Check Steering System Friction,
Replace as needed.
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STEERING
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