2003 FORD MUSTANG steering

9. Remove the power brake booster nuts.
10. Remove the power brake booster nut.
11. Remove the booster.
Installation 1. Follow the removal procedure in reverse order. zInstall new Teflon® seals on the power steering pressure fittings. Klj . 3 ba
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SPECIFICATIONS
SECTION 211-
00: Steering System — General Information 2003 Mustang Workshop Manual General Specifications
Item Specification
Lubricants
Motorcraft MERCON® Multi-Purpose (ATF) Transmission Fluid XT-
2- QDX MERCON®
Power Steering Gear
Turning effort 2.27 Kg (5.0 lb)
Turns lock-to-
lock 2.38
Power Steering Purge Vacuum
Vacuum 68-
85 kPa (20- 25 in/hg) Power Steering Pump —
CII Flow 9.8 liters/minute
(2.6 gpm)
Fluid @ 74°- 80° C (165°-175°
F)
Engine at 1,500 rpm Pressure 1,034 kPa
(150 psi)
Fluid @ 74°- 80° C (165°-175°
F)
Engine at 1,500 rpm Minimum capacity 3.4 liters/minute
(0.9 gpm)
Fluid @ 74°- 80° C (165°-175°
F)
Engine at idle
Pressure at 5,102 kPa (750
psi) Relief pressure 7,240-8,400 kPa
(1,050-1,230 psi) Power Steering Pump —
CIII Flow 9.8 liters/minute
(2.6 gpm)
Fluid @ 74°- 80° C (165°-175°
F)
Engine at 1,500 rpm Pressure 1,034 kPa
(150 psi)
Fluid @ 74°- 80° C (165°-175°
F)
Engine at 1,500 rpm Minimum capacity 4.7 liters/minute
(1.25 gpm)
Fluid @ 74°- 80° C (165°-175°
F)
Engine at idle
Pressure at 5,171 kPa (750 psi) Klj . 1 ba
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DESCRIPTION AND OPERATION
Steering System
The steering system has a typical rack-and-
pinion design consisting of the following:
Steering System Components — 3.8L Engine (CII Power Steering
Pump)
Steering System Components — 4.6L Engine (CIII Power Steering Pump) SECTION 211-
00: Steering System — General Information 2003 Mustang Workshop Manual Item Part Number Description
1 3A714 Power steering hose
2 3A674 Power steering pump
3 3493 Power steering hose
4 3504 Steering gear
5 3A130 Tie-
rod end 6 3493 Power steering hose
7 3D746 Power steering fluid cooler Klj . 1 ba
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For information on the power steering oil reservoir (3A697), refer to
Section 211 - 02 .
For information on the steering wheel and column assembly, refer to Section 211 - 04 .
For information on the power steering hoses, refer to Section 211 - 02 .
For information on the front wheel spindles, refer to Section 204 - 01 .
For information on the power steering fluid cooler, refer to Section 211 - 02 .
For information on the power steering pump, refer to Section 211 - 02 .
For information on the steering gear, refer to Section 211 - 02 . Item Part Number Description
1 3A713 Power steering hose
2 3R700 Power steering pump reservoir
3 3A714 Power steering hose
4 2B559 Hydro-boost assy
5 3E525 Power steering hose
6 3504 Steering gear
7 3A130 Tie-
rod end 8 3A713 Power steering hose
9 3D746 Power steering fluid cooler
10 3A674 Power steering pump Klj . 2 ba
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DIAGNOSIS AND TESTING
Steering System
Inspection and Verification
CAUTION: Do not hold the steering wheel (3600) at the stops for an extended amount of
time. Damage to the power steering pump (3A674) will result. NOTE: Make the following preliminary checks before repairing the steering system:
SECTION 211-
00: Steering System — General Information 2003 Mustang Workshop Manual Special Tool(s)
Dial Thermometer 0-
220°F
023- R0007 or Equivalent Hand Held Automotive Meter
105-
R0053 or Equivalent Power Steering Analyzer
211-
F001 (014- 00207) or
Equivalent Spring Scale
211-
034 (T74P-3504- Y) Tach Adapter
418-
F102 (007- 00061) or
Equivalent Tie-
Rod End Remover Tool
211- 001 (TOOL- 3290-D) or
Equivalent Klj . 1 ba
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1. Verify the customer concern by operating the steering system.
2. Inspect Tires
zCheck the tire pressure. Refer to the Vehicle Certification (VC) label.
z Verify that all tires are sized to specification.
z Check the tires for damage or uneven wear.
3. Belt and Tensioner Check zRefer to Section 303 - 05 for diagnosis and testing of the accessory drive system.
4. Fluid Level Check zVerify that the power steering fluid level is within the appropriate indicated range, hot for
the 3.8L engine and cold for the 4.6L engine. Add Motorcraft MERCON® Multi- Purpose
ATF XT -2-QDX or MERCON® equivalent.
5. Air Bleeding zVerify that there is no air in the power steering system. Run the engine (6007) until it
reaches normal operating temperature. Turn the steering wheel to the left and right
several times without hitting the stops. If any air bubbles are present, refer to Purging —
CII Power Steering Pump or
Purging — CIII Power Steering Pump in this section.
External Leak Check — Typical Power Rack-and-Pinion Steering Gear Klj . 2 ba
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6. External Leak Check
zWith the ignition switch at OFF, wipe off the power steering pump, power steering hoses,
power steering fluid cooler (3D746) and steering gear (3504).
z With the engine running, turn the steering wheel from stop- to-stop several times. Do not
hold steering wheel at stops. Check for leaks. Repair as necessary if leaks are observed.
7. Turning Effort Check zRefer to Turning Effort Test under Component Tests in this section.
8. Visually inspect for obvious signs of mechanical damage; refer to the following chart. Klj . 3 ba
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9. If an obvious cause for an observed or reported malfunction is found, correct the cause (if
possible) before proceeding to the next step.
10. If the fault is not visually evident, determine the symptom and proceed to the following symptom chart.
Steering System Symptom Definitions
Drift/Pull
Pull is a tugging sensation, felt by the hands on the steering wheel, that must be overcome to keep the
vehicle going straight.
Drift describes what a vehicle with this condition does with hands off the steering wheel.
zA vehicle-related drift/pull, on a flat road, will cause a consistent deviation from the straight-
ahead path and require constant steering input in the opposite direction to counteract the effect.
z Drift/pull may be induced by conditions external to the vehicle (i.e., wind, road camber).
Excessive Steering Wheel Play
Excessive steering wheel play is a condition in which there is too much steering wheel movement
before the wheels move. A small amount of steering wheel free play is considered normal.
Feedback
Feedback is a roughness felt in the steering wheel when the vehicle is driven over rough pavement.
Hard Steering or Lack of Assist
Hard steering or lack of assist is experienced when the steering wheel effort exceeds specifications.
Hard steering can remain constant through the full turn or occur near the end of a turn. It is important
to know the difference between hard steering/lack of assist and binding.
Hard steering or lack of assist can result from either hydraulic or mechanical conditions. It is extremely
important to know if this concern occurs during driving, during very heavy or static parking maneuvers.
Nibble
Sometimes confused with shimmy, nibble is a condition resulting from tire interaction with various road
surfaces and observed by the driver as small rotational oscillations of the steering wheel. Poor Returnability/Sticky Steering Visual Inspection Chart
Mechanical
z
Loose tie- rod ends
z Loose suspension components
z Loose steering column shaft universal joints
z Loose column intermediate shaft bolts
z Steering gear
z Binding or misaligned steering column
z Power steering pump
z Bent or pinched power steering hoses Klj . 4 ba
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