To perform a DIY trailer brake conversion, follow these systematic steps provided by Axle Inc. to ensure a safe and effective installation:
- Preparation and Safety: Begin by assessing your current brakes and axle compatibility. Measure axle dimensions (width, hub face, and spring centers) to ensure the conversion kit matches your load ratings and bolt patterns. Always wear protective gear and disconnect the trailer battery before starting.
- Unpack the Kit: Open your hydraulic disc brake conversion kit and verify that all components, including calipers, rotors, hoses, and fittings, are present and undamaged.
- Mount the Rotors: Securely attach the brake rotors to the trailer axle hubs. Use a torque wrench to tighten the bolts to 80-100 ft-lbs.
- Install the Calipers: Position the calipers over the rotors and align them with the mounting brackets. Tighten the bolts to 25-30 ft-lbs and ensure the pistons move freely.
- Connect Hydraulic Lines: Route the brake hoses from the actuator to each caliper. Use flare fittings for secure seals and bleed the system with DOT 3 fluid to remove all air.
- Wire the Actuator: If performing an electric over hydraulic upgrade, connect the actuator to the trailer’s brake controller output and ground it to the frame. Test the system with 12V power.
- Final Inspection: Check all connections for leaks and perform a low-speed test tow. It is highly recommended to have a professional inspection following a DIY installation to guarantee long-term safety.
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