Hydraulic Control Assembly - Antilock Brakes: Service and Repair
Hydraulic Control Unit (HCU)
Removal and Installation
WARNING: Do not use any fluid other than clean brake fluid meeting manufacturer's specification. Additionally, do not use brake fluid that has been previously drained. Following these instructions will help prevent system contamination, brake component damage and the risk of serious personal injury.
WARNING: Carefully read cautionary information on product label. For EMERGENCY MEDICAL INFORMATION seek medical advice. In the USA or Canada on Ford/Motorcraft products call: 1-800-959-3673. For additional information, consult the product Material Safety Data Sheet (MSDS) if available. Failure to follow these instructions may result in serious personal injury.
NOTICE: Do not spill brake fluid on painted surfaces or damage to the surface may occur. If brake fluid is spilled onto a painted or plastic surface, immediately wash the surface with water.
NOTICE: Electronic modules are sensitive to static electrical charges. If exposed to these charges, damage may result.
NOTICE: When replacing either the Hydraulic Control Unit (HCU) or the Anti-Lock Brake System (ABS) module individually, make sure that the number of coils (metal cans) in the ABS module equals the number of valves in the HCU. This is an additional method of verifying that the correct replacement part number has been selected. Failure to follow this instruction may result in damage to the components.
1. If a new Hydraulic Control Unit (HCU) is being installed, connect the scan tool and upload the module configuration information from the ABS module. For additional information on configuration, refer to Programmable Module Installation (PMI) in Module Configuration Programmable Module Installation (PMI).
2. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Jacking and Lifting Service and Repair.
3. NOTE: The HCU bracket-to-body bolt is accessed through the LH wheel opening.
Remove the HCU bracket-to-body bolt.
- To install, tighten to 25 Nm (18 lb-ft).
4. Remove the cooling system degas bottle. For additional information, refer to Engine Cooling Service and Repair.
5. Disconnect the ABS module electrical connector.
6. NOTICE: Overtightening the brake tube fittings will damage the fittings and the HCU.
NOTE: Note the location and orientation of all brake tubes before disconnecting the brake tube fittings.
Disconnect the brake tubes from the HCU.
- To install, tighten the 2 brake master cylinder brake tube fittings to 25 Nm (18 lb-ft).
- To install, tighten the 4 caliper brake tube fittings to 23 Nm (16 lb-ft).
7. Remove the 2 HCU bracket-to-body nuts.
- To install, tighten to 25 Nm (18 lb-ft).
8. Remove the HCU.
9. Remove the 3 HCU-to-HCU bracket bolts and separate the bracket and the HCU.
- To install, tighten to 15 Nm (133 lb-in).
10. To install, reverse the removal procedure.
1. If a new HCU was installed, the ABS module must be configured (using vehicle as-built data or module configuration information retrieved earlier in this procedure). For additional information on configuration, refer to PMI in Module Configuration Programmable Module Installation (PMI).
2. Bleed the brake system. For additional information, refer to Brake System - General Information Brake System Bleeding.