This procedure covers the removal and replacement of the ABS hydraulic control unit (HCU) pump assembly on a 2011-2014 Ford F-150 5.0L V8 4WD, including brake line disconnection, system bleeding, and verification.

Warnings

Tools required

Parts

• ABS hydraulic control unit (HCU) assembly × 1 — Use OEM Ford specification
• Brake fluid × 1 — Motorcraft DOT 4 LV
• Brake line banjo bolt sealing washers × 10 — Use OEM specification

Fluids

• Motorcraft DOT 4 LV Brake Fluid — 1.5 qt

Preparation

1. Park vehicle on level ground and apply parking brake. Place wheel chocks behind rear wheels.
2. Disconnect negative battery cable and wait 2 minutes for airbag system to discharge.
3. Use turkey baster or fluid extractor to remove as much brake fluid as possible from master cylinder reservoir to minimize spillage.
4. Raise front of vehicle and secure on jack stands. Remove both front wheels.
5. Have clean rags and drain pan ready to catch brake fluid during line disconnection.
6. Spray penetrating oil on all brake line fittings at ABS pump and allow to soak for 10-15 minutes.
7. Label all brake lines with tape to ensure correct reconnection during assembly.

Procedure

1. 1

   Access the ABS pump assembly
   The ABS pump is located in the engine compartment on the driver's side frame rail near the master cylinder. Remove the battery and battery tray if additional access is needed. Remove any plastic covers or shields obstructing access to the pump mounting area.
2. 2

   Disconnect ABS pump electrical connector
   Locate the main electrical connector on the ABS pump assembly. Press the release tab and carefully disconnect the connector. Move the wiring harness aside and secure it away from the work area to prevent damage.
   ⚠Do not pull on wires. Always disconnect by pulling on the connector body to avoid damaging pins.
3. 3

   Disconnect primary brake lines
   Using flare nut wrenches, carefully loosen and disconnect the brake lines from the ABS pump. There are typically 5 brake lines: one from the master cylinder and four to each wheel circuit. Place rags around each fitting before loosening. Work slowly to avoid rounding off fittings. Cap or plug all open lines immediately to prevent fluid loss and contamination.
   ⚠️Brake fluid will spray when lines are loosened. Protect eyes and skin. Keep fluid away from painted surfaces.
4. 4

   Remove ABS pump mounting bolts
   Locate the mounting bolts securing the ABS pump assembly to its bracket on the frame rail. Typically there are 3-4 bolts securing the unit. Remove these bolts and carefully lift the ABS pump assembly from its mounting location. The unit is heavy and contains residual brake fluid, so support it carefully during removal.
   ⚠ABS pump assembly weighs approximately 8-10 lbs and contains fluid. Support unit to prevent dropping.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
5. 5

   Clean mounting surfaces and inspect brake lines
   With the old pump removed, use a wire brush to clean the mounting bracket and frame rail area. Inspect all brake line ends for damage, corrosion, or stripped threads. Inspect the brake line routing and ensure no lines are kinked or damaged. Replace any damaged brake lines before proceeding.
6. 6

   Install new ABS pump assembly
   Position the new ABS pump assembly onto the mounting bracket, aligning all mounting bolt holes. Install mounting bolts finger-tight initially. Ensure the pump is properly seated and aligned before tightening. Torque mounting bolts in a cross pattern to specification.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
7. 7

   Reconnect brake lines to ABS pump
   Remove caps from brake lines. Install new sealing washers on all banjo bolt fittings if applicable. Thread each brake line into its correct port on the ABS pump, referring to your labels from disassembly. Start all fittings by hand to prevent cross-threading. Use flare nut wrenches to tighten each fitting securely, but do not overtighten as brake line fittings can strip easily. Typical torque is 13-17 Nm (10-12 lb-ft) for brake line fittings, but tighten to manufacturer specification or until snug plus 1/4 turn.
8. 8

   Reconnect electrical connector
   Reconnect the main electrical connector to the ABS pump assembly. Ensure the connector clicks into place and the locking tab is fully engaged. Verify wiring harness is properly routed and secured away from hot or moving components.
9. 9

   Reinstall battery and access components
   If removed, reinstall the battery tray and battery. Reconnect the negative battery cable. Reinstall any shields or covers that were removed for access. Do not reinstall wheels yet as brake bleeding will require wheel access.
10. 10

    Fill brake fluid reservoir
    Fill the master cylinder reservoir to the MAX line with fresh Motorcraft DOT 4 LV brake fluid. Keep the reservoir topped off throughout the bleeding process. Never let the reservoir go below the MIN line or air will enter the system.
    ⚠️Use only fresh Motorcraft DOT 4 LV brake fluid from a sealed container. Never reuse old brake fluid or mix brake fluid types.
11. 11

    Perform manual brake bleeding
    Bleed brakes in this order: RR (right rear), LR (left rear), RF (right front), LF (left front). At each wheel, attach bleeder hose to bleeder screw and submerge other end in container with clean brake fluid. Have an assistant pump brake pedal 3-4 times and hold. Open bleeder screw 1/2 turn, allow fluid/air to evacuate, then close bleeder screw before pedal reaches floor. Repeat until no air bubbles appear. Check and refill reservoir frequently. Torque bleeder screws to specification when finished at each wheel.
    ⚠Never allow brake pedal to go to floor with bleeder open or air may be drawn into ABS pump.
    Torque spec

    Bleeder Screw10 Nm (7 lb-ft)
12. 12

    Perform ABS pump bleeding with scan tool
    Connect a professional scan tool capable of ABS system bleeding. Navigate to ABS bleeding function. Follow scan tool prompts to activate ABS pump motors and solenoids. This cycles internal valves and purges trapped air from the HCU. The pump will make clicking and whirring sounds during this process. Monitor brake fluid reservoir and refill as needed. After scan tool cycling is complete, repeat manual bleeding procedure at all four wheels to purge any remaining air.
    ℹ️Scan tool bleeding is critical for this repair. Manual bleeding alone will not remove all air from the ABS hydraulic control unit.
    Torque spec

    Bleeder Screw10 Nm (7 lb-ft)
13. 13

    Final system check and pedal test
    With engine off, pump brake pedal 15-20 times to verify firm pedal. Pedal should become firm and hold pressure. If pedal is spongy or sinks, air remains in system and additional bleeding is required. Check all brake line connections for leaks. Wipe connections dry, pump pedal, and inspect for fluid seepage. Top off brake fluid reservoir to MAX line.
14. 14

    Reinstall wheels and test vehicle
    Reinstall both front wheels. Torque lug nuts in a star pattern to specification. Lower vehicle to ground. Start engine and verify ABS warning light extinguishes after 2-3 seconds. Pump brake pedal with engine running to verify power assist function. Pedal should remain firm.
    ⚠Do not drive vehicle until brake pedal feel is verified as firm and ABS light functions normally.
    Torque spec

    Wheel Lug Nuts204 Nm (150 lb-ft)

Reassembly

1. Ensure all brake line fittings are tight and leak-free
2. Verify electrical connector is fully seated and locked
3. Confirm brake fluid reservoir is at MAX line with proper DOT 4 LV fluid
4. Double-check all mounting bolts are torqued to specification
5. Verify no tools or rags are left in engine compartment

Verification

• Start engine and verify ABS warning light illuminates briefly then extinguishes within 3 seconds
• Pump brake pedal 10 times with engine running - pedal should be firm and not sink
• Perform careful test drive in safe area at low speed, testing normal braking - pedal should be firm with no pulsation during normal stops
• Perform test of ABS function in safe area - press brake pedal firmly while traveling 15-20 mph on loose gravel or slippery surface to verify ABS pulses
• Check for brake fluid leaks around all ABS pump connections after test drive
• Verify no warning lights remain illuminated on instrument cluster
• Scan for diagnostic trouble codes with scan tool - there should be no ABS-related codes present

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