Product Description
The Demco 8705101 is a bolt-on hydraulic surge brake actuator with an integrated coupler, built for trailers with disc brakes. When the tow vehicle slows, the trailer pushes forward against the actuator, which pressurizes the master cylinder and applies the trailer's hydraulic brakes in proportion to how hard you're stopping. The coupler accepts a 2-inch ball and the actuator bolts onto a 3-inch-wide straight tongue.
This model has an electric reverse lockout: a backup solenoid, wired to the tow vehicle's reverse lights, keeps the brakes from applying when you back up. The solenoid and a cover are included; the two mounting bolts are not.
Compatibility
- Trailers with hydraulic disc brakes
- 3-inch-wide straight tongue (bolt-on)
- 2-inch hitch ball
Measure your trailer tongue and confirm your brake type before ordering. Contact us if you're not sure which actuator you need.
Specifications
- Manufacturer: Demco
- Part number: 8705101
- Brake type: Hydraulic disc
- Gross trailer weight rating: 7,000 lbs
- Tongue weight: 700 lbs
- Ball size: 2 inch
- Tongue width: 3 inches
- Mounting: Bolt-on (two 1/2 x 4-1/2-inch bolts required)
- Reverse lockout: Electric (backup solenoid)
- Material / finish: Steel, plated
- Made in: USA
- Warranty: Demco lists a limited 1-year warranty
Features
- Diaphragm in the master cylinder cap keeps the system fully enclosed
- Raised fill plate helps keep contaminants out when the cap is removed
- Tie loops on the cap allow it to be tethered with a tamper-evident seal
- Bellows boot on the pushrod for added protection from moisture and dirt
- Color-coded decal on the emergency lever shows at a glance whether the brakes are on or off
- Integrated shock dampening
- Glass-reinforced nylon master cylinder that won't rust or corrode
Helpful Links
Shipping & Availability
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