Demco Hydraulic Brake Actuator w/ Drop - Disc - Zinc - 2-5/16" Ball - 8,000 lbs

Video Transcript for Demco Brake Actuator - Surge Brake Actuator - DM8758811 Review

Speaker 1: Today we're gonna take a look at the Demco Hydraulic Disc Brake Actuator, with the 2 5/16" ball coupler, 4" drop and an 8,000 pound weight capacity.Now this hydraulic actuator will activate your trailer brakes when your tow vehicle slows or stops. Basically, when you apply the brakes in your tow vehicle deceleration occurs and the momentum will push your trailer toward the rear of your vehicle. So with the surge brake system, the actuator's triggered as your trailer moves forward, once your tow vehicle starts to slow down. When this happens, the actuator will contract and applies force to the master cylinder back here, and this in turn supplies the necessary hydraulic pressure to engage your trailer brakes.This uses a composite master cylinder, which is very durable and efficient. Uses glass reinforced nylon construction, resists rust and corrosion. It's a very large reservoir to provide increased capacity for the brake fluid.

And if you notice on the top here, it has a nice automotive style diaphragm cap. This helps create a completely enclosed system to help prevent contamination of your brake fluid.On the inside of this actuator, they do offer an acetal copolymer lining and that provides a nice smooth operation as the actuator telescopes in and out. The ball coupler right up here uses an easy latch coupler mechanism for a simple, secure hookup and disconnect. Makes it very easy, it'll let you hook up your latch when it's in the closed position like it is now. All you do is just drop the coupler over the hitch ball and the latch will snap into place.I just want to show you that.

I happen to pull a . here's 2 5/16" diameter hitch ball. So if we just lift this up, put the ball under there, you see if you just put the coupler onto the ball and then push it down, it'll automatically go down, lock into place, and you don't have to keep opening and closing the lever. Then to remove it, all you have to do is pull up on this lever down here, extend it all the way open, and then just lift it off the ball. So simple like that, easy latch mechanism.

Now this does also have a built-in 4" drop on the ball coupler, helps you match your tow vehicle height.The break away kit right up here, the wire with the hook attached to it, this break away kit ensures a secure connection to your break away lever. Basically what you do with the break away kit, this would hook to your tow vehicle, and in the event the trailer would come unhooked from your tow vehicle, it would pull this cable which would activate the lever and then apply the brakes on a runaway trailer so it doesn't go anywhere.Now this actuator is of heavy duty steel construction. Has a nice zinc plating to offer corrosion resistance. Goes through a 200 hour salt spray rating. It is a bolt on installation.

It does mount to a straight 3" wide trailer tongue. To install this does require 1/2" by 4 1/2" long grade 5 bolts for mounting. They are not included.A few specs on this. The application is for trailers with hydraulic disc brakes. The ball size again it fits on, is a 2 5/16" diameter hitch ball. Gross towing weight capacity is 8,000 pounds. Maximum tongue weight capacity is 800 pounds. The drop is 4" and this also goes by the model number of DA91.But that should do it for the review on the Demco Hydraulic Disc Brake Actuator with the 2 5/16" ball coupler, the 4" drop and an 8,000 pound weight capacity.