For buyers seeking reliable brake control on covered or flatbed trailers, surge brakes offer dependable stopping power without constant electrical wiring. This guide highlights five top surge brake components suitable for common trailer setups, detailing who each product is best for, why it was selected, and any notable limitations. The selections emphasize ease of installation, compatibility with hydraulic disc or drum brakes, and secure engagement for different trailer weights.
Summary of selected products
- Demco DA70 Surge Brake Actuator for Hydraulic Drum Brakes 7K EZ-Latch
- 7,500 Lb A-60 Tandem Hydraulic Disc Brake Actuator Inner Slide
- Surge Brake Lockout Key with Magnetic Lock Out (UFP/Dexter compatibility)
- Demco DA70 Surge Brake Actuator w/Solenoid for Disc Brakes 7K EZ-Latch
- Lock Out Key Set for UFP Type Surge Brakes (2 Pack)
Best Demco DA70 Surge Brake Actuator (7K)
The Demco DA70 is designed for hydraulic drum brake systems with a 7,000-pound capacity and EZ-Latch coupling for straightforward installation. Best for trailers using drum brakes that need a robust actuator with a reliable latch mechanism and simple engagement. This model suits single-axle or small-to-midweight tandem trailers that require consistent braking response.
Best for: Trailering applications prioritizing quick latch action and compatibility with drum brake configurations. Choose this if your system uses hydraulic drum brakes and you want a proven, user-friendly actuator with durable construction.
Limitation: Not ideal for disc brake setups unless paired with compatible components; verify drum brake compatibility before purchasing.
Best A-60 Tandem Hydraulic Disc Brake Actuator Inner Slide
This 7,500-pound rated actuator is built for tandem setups with hydraulic disc brakes. Its inner-slide design supports smoother engagement and reduced side load, which is beneficial for longer trailers or heavy loads. It’s a solid choice for buyers who need higher towing capacity with disc brakes and straightforward maintenance.
Best for: Heavier trailers using hydraulic disc brakes that require reliable, robust actuation and a design optimized for tandem configurations. Choose this if increased load handling is a priority and disc brakes are standard on your trailer.
Limitation: May require more precise mounting alignment; verify compatibility with your existing disc brake system.
Surge Brake Lockout Key With Magnetic Lockout
This lockout key is designed to temporarily disable surge brakes on UFP by Dexter systems, which can be useful during maintenance or when towing without braking. The magnetic lockout feature allows quick access, making it a convenience item for boat trailers and other heavy-haul setups.
Best for: Trailer owners who occasionally need to disable surge brakes for maintenance or specific hauling scenarios. Choose this if your setup uses UFP/Dexter surge brakes and you want a fast, reusable lockout option.
Limitation: Not a primary braking component; relies on the vehicle’s standard braking setup when lockout is engaged. Ensure you understand when lockout should be used to maintain safety.
Demco DA70 Surge Brake Actuator with Solenoid for Disc Brakes (7K EZ-Latch)
This variant of the DA70 adds a solenoid kit to support disc brake systems, delivering precise control and improved engagement for seven-ton class trailers. EZ-Latch ensures quick coupling, and the disc brake compatibility expands the product’s use across more modern trailer builds.
Best for: Trailers with hydraulic disc brakes seeking precise actuation and a reliable latching mechanism. Choose this if your system uses disc brakes and you want an actuator designed for easy installation and operation.
Limitation: Will require proper solenoid wiring and setup; confirm compatibility with your trailer’s electrical system before installation.
Lock Out Key Set for UFP Surge Brakes (2 Pack)
This two-pack lockout key set is compatible with UFP-type surge brakes from Dexter and related systems. It provides a backup or shared-use option for situations where multiple operators need access to the lockout feature or where a spare is prudent for maintenance routines.
Best for: Boat or trailer owners who rely on lockout functionality and want a cost-effective spare. Choose this if you manage multiple trailers or want redundancy for lockout access.
Limitation: Lockout keys are supplementary; they do not affect braking performance beyond enabling lockout functionality when needed.
Buying Guide: Surge Brakes For Trailers
- What trailer type do you own?
- What is your tow capacity and required brake performance?
- Is ease of installation important?
- Do you need brake lockout capability?
- What about electrical or solenoid integration?
Consider whether you have a drum or disc brake system, and whether your trailer is single-axle or tandem. Drum brake actuators like the DA70 variants are often easier for drum-only systems, while disc brake actuators are tailored for disc brakes and may offer smoother engagement and higher load ratings.
Actuators are rated by trailer weight. Choose a model matching or exceeding your gross trailer weight to ensure safe stopping power and long service life.
EZ-Latch models simplify coupling and reduce installation time. If you value fast setup, prioritize EZ-Latch compatibility and clear mounting instructions.
Lockout keys provide temporary disengagement for maintenance or specific hauling scenarios. Only use lockout when necessary and follow safety guidelines to prevent unintended braking.
Disc-brake actuators with solenoids enable more precise brake control and remote actuation, which can improve performance on certain systems. Ensure your vehicle’s wiring and power supply are compatible with solenoid-equipped actuators.
Frequently Asked Questions
What is a surge brake actuator?
A surge brake actuator converts the trailer’s forward motion into hydraulic force to apply the brakes, typically without an electric connection.
Are surge brakes compatible with all trailers?
Most surge brakes are designed for common trailer configurations, including drum and disc brake systems. Always verify compatibility with your brake type and axle configuration.
Do I need a lockout key?
Lockout keys are optional for maintenance or specific towing needs. They do not improve braking performance but provide temporary disengagement when required.
What should I check before buying?
Check brake type (drum or disc), the trailer’s weight rating, mounting compatibility, and whether the actuator’s latch and solenoid features align with your system.
Is professional installation recommended?
For safety and reliability, professional installation is advised if you are unsure about hydraulic connections or wiring for disc-brake solenoids.