Demco EZ DA70 Surge Brake Actuator for Hydraulic Drum Brakes — 7,000 lb, 2" EZ-Latch, Zinc-Plated Silver

Demco EZ DA70 is a zinc-plated surge brake actuator built for hydraulic drum brake trailers, delivering a 7,000 lb towing capacity with a 2" EZ-Latch ball coupler for fast, secure hookups.

Designed for trailers with hydraulic drum surge brakes and a straight 3" wide tongue, the DA70 couples robust braking performance with corrosion-resistant construction and a user-friendly EZLatch mechanism. It handles up to 7,000 pounds gross towing weight and supports as much as 700 pounds of tongue weight. The unit is intended to mount on a standard straight trailer tongue using 2-1/2" x 4-1/2" Grade-5 bolts (not included).

How does this actuator improve trailer braking control?

The DA70 translates the trailer's forward inertia into hydraulic pressure for drum brakes, offering smoother, coordinated stopping without an electric brake controller. Its rated capacity supports medium-duty trailers, helping maintain predictable brake response under load. Zinc plating also helps preserve performance by resisting rust on critical moving parts.

• Converts surge movement into hydraulic brake force for drum systems
• 7,000 lb gross towing weight rating for mid-size trailers
• Corrosion-resistant finish for consistent operation over time

Will this fit my trailer tongue and coupler requirements?

This actuator is built to mount on straight 3" wide trailer tongues and pairs with a 2" ball coupler — the industry standard for many utility, equipment, and car hauler trailers. Installation requires two 2-1/2" x 4-1/2" Grade-5 bolts (sold separately), and the unit is sized to sit flush on common tongue profiles for a straightforward retrofit.

• Mounts on 3" wide straight trailer tongues
• Designed for a 2" ball coupler (EZLatch style)
• Uses Grade-5 2-1/2" x 4-1/2" bolts for secure attachment (not included)

What features make the EZ-Latch coupler convenient?

The EZLatch coupler provides a fast, positive connection to a 2" tow ball, reducing fumble time and improving repeatable hookups. Its latch geometry simplifies engagement and disengagement while maintaining a secure hold under towing load. The zinc-plated finish helps keep the mechanism moving freely in wet or salty environments.

• EZLatch design for quick, reliable hitch engagement
• 2" ball compatibility for common towing setups
• Zinc plating to limit corrosion and preserve latch action

How durable and serviceable is the DA70 actuator?

Constructed with a zinc-plated exterior, the actuator resists rust and extends service life in outdoor and marine-adjacent settings. The mechanical simplicity of surge brake actuators makes routine inspection and bolt-tightening straightforward for DIY-minded owners or professional shops. Replacement parts and mounting hardware are accessible if maintenance or repair becomes necessary.

• Zinc-plated body for long-term corrosion resistance
• Simple mechanical design enables easy inspection and service
• Compatible with common replacement hardware and components

Who is this for: The Demco EZ DA70 is aimed at owners of medium-duty trailers with hydraulic drum surge brakes who need a dependable, easy-to-use actuator rated for up to 7,000 pounds. It's a good match for equipment haulers, car trailers, small livestock trailers, and other applications using a straight 3" tongue and a 2" ball coupler. If you plan to retrofit or replace an actuator, ensure your tongue dimensions match and budget for Grade-5 mounting bolts during installation.