10.2.1.9 Hydraulic Surge Brake
Before each tow, perform the following steps:
• Check that the brake master cylinder level as instructed above. Check for leaks and repair as
required.
• Examine the actuator for wear, bent parts, corroded/seized parts, or other damage. Have the
affected components replaced with genuine service parts.
• Check to determine that the actuator mounting bolts are tightened to the manufacturer’s
• Test the actuator and brake function as described in the Coupling to the Tow Vehicle section
of this manual. Actuator travel over one inch indicates that the brakes need adjustment (or that
assembly moves to the outer case during braking. Adjust the brakes following the instructions
given in the brake installation manual. Failure to adjust brakes will result in loss of braking.
• Before storage or after extended use, apply motor oil to the coupler components and the
internal rollers to keep them moving freely and to prevent corrosion.
See the surge brake manufacturer’s manual for other inspection and maintenance activities. If
you do not have this manual, contact your dealer for assistance.
10.2.1.10 Master Cylinder Bleeding
Wipe up any spills immediately and wash the area with water.
Bleed the brake system either manually or with a pressure bleeder. Pressure bleeding
instructions provided with the pressure bleeder. If you chose to manually bleed the system, an
assistant is required. Use the following steps to manually bleed the brake system:
• Disconnect the trailer from the tow vehicle and jack the trailer’s tongue until it is horizontal.
Make sure that the wheels are blocked so that the trailer will not roll away.
• Install a bleeder hose on the bleeder screw of the farthest wheel cylinder from the actuator. If
the actuator to return to its rest position.
Repeat the process until no more bubbles are released with the stroke. Air trapped in the brake
when the cylinder is fully bled. Repeat the bleeding operation at each wheel cylinder. During the
does not fall below half full. This will ensure that no air is drawn into the system.
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INSPECTION, SERVICE & MAINTENANCE