Demco Hydraulic Brake Actuator - Drum - Black - 8" Adjustable Channel Down - 8,000 lbs

Surge-type actuator features a corrosion-resistant composite master cylinder and a durable black powder coat finish. Adjustable down channel lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Bolt-on application.

Features:

• Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
• Adjustable channel has 3 different mounting positions for coupler (sold separately)
  • Channel-down design allows for greater drop
• Composite master cylinder is durable and efficient
  • Glass-reinforced nylon construction resists rust and corrosion
  • Large reservoir provides increased capacity for brake fluid
  • Automotive-style diaphragm cap creates completely enclosed system to help prevent contamination of fluid
• Acetal copolymer lining provides smooth operation as actuator telescopes in and out
• Breakaway included
• Heavy-duty steel construction
• Black powder coat finish resists corrosion
• Bolt-on installation
  • Requires 1/2" x 4-1/2" Grade 5 bolts (not included) for bolt-on mounting
• Made in the USA

Specs:

• Application: trailers with hydraulic drum brakes
• Gross towing weight: 8,000 lbs
• Maximum tongue weight: 800 lbs
• Channel width: approximately 3"
• Channel height: 8"
• Mounting: straight, 3" wide trailer tongue
• Model number: DA91
• 1-Year warranty

Note: This actuator is compatible with the Demco manual reverse lockout kit (DM5939). If you choose not to add the reverse lockout, it is recommended that you equip your trailer with free-backing brakes so that you can drive in reverse without the actuator triggering your trailer's brakes.

When you apply the brakes in your tow vehicle, deceleration occurs and momentum pushes your trailer toward the rear of your vehicle. With surge brake systems, the hydraulic actuator is triggered as your trailer moves forward, once your tow vehicle starts to slow down. When this happens, the actuator contracts, applying force to its master cylinder. This in turn supplies the necessary hydraulic pressure to engage your trailer's brakes.

Adjustable Channel Design

The adjustable channel on this trailer brake actuator allows for ultimate versatility. Mount almost any type of coupler (sold separately) - from a standard ball coupler to a lunette ring or clevis attachment - to fit your specific application. In addition, the 3 mounting positions on the channel let you adjust the height of the coupler. Just place the coupler so that it matches the height of the ball mount or other hitch attachment on your tow vehicle and you will be able to tow your trailer levelly.

This actuator is great for tall trailers. This is because the adjustable channel is positioned so that the mounted coupler can sit below the actuator tube, allowing for a greater drop than with a standard center-mounted channel. As a result, you can line up your tall trailer with your tow vehicle's hitch for a level setup.

8759138 Demco DA91 Hydraulic Trailer Brake Actuator for Drum Brakes - Channel Down - 8,000 lbs