27601 Co Rd 50
Nappanee, IN 46550
Call Us (574) 354-1384
Working Hours MON - THUR 7AM - 3PM
FRI 7AM - 1PM
Hydraulic and electric-over-hydraulic

Trailer Disc Brake
Repair

We service surge-brake systems commonly found on boat trailers and electric-over-hydraulic disc brakes used on heavier trailers.

About this service

What This Service Covers and When to Get Help

Disc brakes use hydraulic pressure to squeeze brake pads against the rotors. Many boat trailers create that pressure with a surge actuator built into the coupler. As the tow vehicle slows, the actuator slides and sends brake fluid to the calipers.

Heavy 9K, 10K, and 12K axle applications often use an electric-over-hydraulic actuator instead. The tow vehicle sends 12-volt power to the actuator, which then supplies hydraulic pressure. These systems add wiring, power, and actuator diagnostics to the normal pad, rotor, caliper, and fluid inspection.

Service pricing

Typical Costs for This Service

Disc brake parts are generally more expensive than drum brake components. The system type, axle capacity, pad and rotor condition, and actuator health all affect the total.

3.5K-7K axle applications
$400-$1,700
Service can include pads, rotors, calipers, fluid, and actuator work
8K, 9K, 10K and 12K axles
$600-$4,200
Heavy-duty parts and electric-over-hydraulic systems cost more
Actuator replacement
Quoted after testing
A Dexter actuator alone can add roughly $990 in parts; call for current pricing

These ranges are based on common scenarios supplied by our shop and are not a quote. Parts prices, trailer condition, configuration, and labor can change the final cost.

What to expect

What Happens During Service

01

Inspect pads and rotors

We measure wear and look for damage caused when a pad wears down to its steel backing.

02

Test the hydraulic system

We check fluid, lines, calipers, and the surge or electric actuator for correct operation.

03

Service and bleed

We replace the needed parts, exchange old brake fluid, bleed the system, and verify braking.

The brake pads are the main wear item to watch

Pads that wear completely through can damage the rotors and turn a routine service into a larger repair. We recommend a disc brake inspection and service once a year.

Common questions

Questions About Disc Brakes

What is the difference between surge and electric-over-hydraulic disc brakes?

A surge actuator responds to pressure from the tow vehicle slowing against the trailer coupler. An electric-over-hydraulic system uses 12-volt input from the tow vehicle to run a hydraulic actuator. Both apply hydraulic pressure at the calipers.

Do rotors need to be replaced with every pad change?

Not necessarily. Rotor condition determines whether it can remain in service. If the pad has worn to the metal backing and damaged the rotor, replacement is much more likely.

Do you replace trailer brake fluid?

Yes. Disc brake service can include bleeding the system and replacing the old fluid with new fluid.

Do you stock boat trailer disc brake parts?

We stock some of the most common parts and can normally obtain other parts in short order.

Trailer repair in Nappanee, Indiana

Tell us what your trailer is doing.

Bring the trailer to our shop for a diagnosis and a repair plan based on the condition we find.

  • Straight answers
  • Common parts in stock
  • Custom work welcome