power steering FORD MUSTANG 2003 Owner's Manual

7. Bleed each brake tube at the brake master cylinder as follows:
1. Have an assistant pump the brake pedal, and then hold firm pressure on the brake pedal.
2. Loosen the rear most brake tube fittings until a stream of brake fluid comes out. While the assistant maintains pressure on the brake pedal, tighten the brake tube fitting.
3. Repeat this operation until clear, bubble- free fluid comes out.
4. Refill the brake master cylinder reservoir as necessary. Repeat the bleeding operation at the front brake tube.
Master Cylinder Priming — 4.6L
1. CAUTION: Use only bleed screws on the engine side of the brake master cylinder
(2140). The hydro- boost bleed screw, located near the dash on the hydro- booster
casting, is for the booster cavity filled with power steering fluid, not brake fluid.
Connect a clear waste line to the bleed screw closet to the booster first and the other end in a
container partially filled with recommended brake fluid.
2. Open the bleeder screw, have an assistant push the brake pedal down slowly through full travel, close the bleeder screw, then return brake pedal slowly to full released position. Wait five
seconds, then repeat operation until air bubbles cease to appear.
3. Repeat Step 2 for bleeder screw farthest from hydro- booster. Klj . 3 ba
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SPECIFICATIONS
SECTION 206-
07: Power Brake Actuation 2003 Mustang Workshop Manual Torque Specifications
Description Nm lb-
ft Power brake booster nuts 25 19
Brake master cylinder nuts 25 19
Hydraulic tube connections 17 13
Power steering pressure lines 19 14 Klj . 1 ba
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DESCRIPTION AND OPERATION
Brake Booster —
Hydro-Boost
The Hydro- Boost brake booster is a hydraulically operated brake booster powered by the power
steering pump (3A674). The power steering pump provides the fluid pressure to operate both the
power brake booster and the power steering gear (3504).
A Hydro- Boost reserve system (accumulator) stores sufficient fluid under pressure to provide at least
two power- assisted brake applications in the event the power steering pump fluid flow is interrupted.
For low assist concerns on vehicles equipped with the Hydro- Boost system, refer to Section 211 - 00 to
check the power steering pump pressure and flow.
The brakes can also be applied manually if the reserve system is depleted.
Any leakage goes directly back to the power steering pump reservoir (3E764). SECTION 206-
07: Power Brake Actuation 2003 Mustang Workshop Manual Item Part Number Description
1 2140 Master cylinder
2 2B559 Hydro-Boost Klj . 1 ba
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GENERAL PROCEDURES
Hydro-
Boost Bleeding
1. NOTE: The Hydro- Boost power brake booster (2B560) is generally self- bleeding, and the
following procedure will normally bleed the air from the power brake booster. Normal operation
of the vehicle will further remove any additional trapped air.
Fill the power steering oil reservoir (3A697) with MERCON® Multi- Purpose ATF XT-2-QDX or
MERCON® equivalent.
2. Remove the powertrain control module (PCM) fuse to prevent the engine from starting.
3. Crank the engine for several seconds.
4. Check the fluid level in the power steering oil reservoir and add if necessary. Install the powertrain control module (PCM) fuse.
5. Start the engine.
6. With the engine running, turn the steering wheel (3600) from stop- to-stop twice. Turn the engine
off.
7. Depress the brake pedal (2455) several times to discharge the accumulator.
8. Repeat Steps 5 and 6.
9. If foaming occurs, stop the engine and allow the foam to dissipate.
10. Repeat Steps 5 and 6 as required, until all the air is removed from the system (when the foaming stops).
SECTION 206-
07: Power Brake Actuation 2003 Mustang Workshop Manual Klj . 1 ba
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5. Disconnect the power steering return line hose (3A005).
6. Disconnect the power steering pressure lines.
7. Remove the self-
locking pin.
8. Remove the stoplight switch (13480) and the brake booster push rod from the brake pedal pin. Klj . 2 ba
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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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