Hydraulic Control Assembly - Antilock Brakes: Service and Repair

Hydraulic Control Unit (HCU)





Material





Removal and Installation

WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes with running water for 15 minutes. Get medical attention if irritation persists. If taken internally, drink water and induce vomiting. Get medical attention immediately. Failure to follow these instructions may result in personal injury.

CAUTION: Brake fluid is harmful to painted and plastic surfaces. If brake fluid is spilled onto a painted or plastic surface, immediately wash it with water.

CAUTION: Electronic modules are sensitive to electrical charges. The anti-lock brake system (ABS) module can be damaged if exposed to these charges.

1. Disconnect the battery.
2. Remove the air cleaner and the air cleaner outlet pipe.





3. Disconnect the electrical connector by rotating the protective cover.
4. Remove the brake line-to-HCU fittings.
^ To install, tighten to 15 Nm (11 ft. lbs.).
5. Remove the 3 HCU bracket-to-frame bolts.
^ To install, tighten to 23 Nm (17 ft. lbs.).
6. Remove the 3 ABS module screws.
^ To install, tighten to 2 Nm (18 inch lbs.).
7. Remove the ABS module.
8. Remove the 3 bracket-to-HCU bolts.
^ To install, tighten to 9 Nm (80 inch lbs.).
9. Remove the HCU.
10. To install, reverse the removal procedure.
^ Bleed the brake system.