This actuator is built to take on wet or salty conditions without rusting out. The heavy-duty steel body is protected by a zinc coating that’s been tested for 500 hours in salt spray, so it holds up strong in marine use and long-term outdoor exposure. The composite master cylinder made of glass-reinforced nylon also resists corrosion, giving you dependable performance when you’re towing in rain, at the ramp, or near the coast.
The master cylinder’s glass-reinforced nylon construction keeps it free from rust and pitting, even after years of use. Its large reservoir keeps plenty of brake fluid on hand, cutting down on refills and helping prevent air from entering the system. The automotive-style diaphragm cap seals it tight to keep moisture and debris out, so your brakes stay consistent and responsive trip after trip.
Getting your trailer to sit level is easy thanks to the built-in 12" adjustable channel. It has five different mounting positions so you can set up your coupler at just the right height. The channel accepts a variety of attachments (sold separately), including a standard ball coupler, lunette ring, or clevis. Once adjusted, your trailer tracks evenly behind you with no hassle.
Mounting this actuator doesn’t require any complicated setup. It’s designed for straight, 3" wide trailer tongues and bolts on using 1/2" x 4-1/2" Grade-5 bolts (not included). The heavy-duty steel construction gives it an 8,000-lb gross towing weight and 800-lb maximum tongue weight rating, making it a solid fit for a range of drum brake setups.
The breakaway system comes ready to go so your trailer can automatically stop if it ever disconnects from the tow vehicle. Inside, an acetal copolymer lining keeps the moving parts operating smoothly as the actuator telescopes in and out, helping maintain steady braking power under load or during sudden stops.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be taking a look at the Demco Hydraulic Brake Actuator. This actuator is designed for trailers with hydraulic drum brakes. It has a gross towing weight capacity of 8000 pounds, and a maximum tongue weight capacity of 800 pounds. The hydraulic actuator activates your trailer's brakes when your tow vehicle slows down or stops. As your trailer moves forward when your vehicle starts to slow down, the actuator contracts, which is going to apply force to its master cylinder, that's an internal component, and then in turn it supplies the necessary hydraulic pressure to engage your trailer's breaks. That's basically how the unit works. This one in particular's going to feature an adjustable channel, that's this area right here, very, very versatile option, it's going to give you 5 different mounting positions for a coupler.
There's a wide variety of couplers to choose from, couplers are sold separately, you can check out some options here at etrailer.com. Now the mount holes on the adjustable portion, these are going to separated on center by 2 inches, and they're going to have a diameter of 5, 8, 7 inch. The unit's made from a heavy duty steel construction, it's going to feature a zinc plating, it's going to do a great job at resisting rusting corrosion. This one is going to feature a 500 hour salt spray rating, so it's going to be great for marine applications. When it comes to the construction of the master cylinder, the master cylinder is this portion back here. This is a composite material, when it comes to the master cylinder it's very durable, very efficient, it's going to feature glass reinforced nylon construction, it's going to resist rusting corrosion, it's got a nice large reservoir that's going to provide increased capacity for brake fluid, and it's going to feature an automotive style diaphragm cap that keeps complete closure.
It's going to keep this area completely closed when it comes in the system, that's going to help prevent contamination of the fluid. I also want to mention that is does come with a breakaway system. The cable and the hook is attached to this line right here. The hook would attach to your tow vehicle, so in the event where your trailer would ever disconnect from your tow vehicle, the cable would be pulled, it would move this lever back to a braking position, which would then bring your trailer to an eventual stop, it would engage the breaks on the trailer bringing it to a stop. That is included. This is a bolt on installation, you're going to have 3 mounting holes located on each side. It does require a half inch by a 4 and a half inch, that's half inch diameter by 4 and a half inch long grade 5 bolts for mounting, those are not included.
The product's made right here in the USA. The cap right here, again, is to put the fluid into the reservoir of the master cylinder. You'll notice that these mounting plates, you got 1 here, and you got 1 the other side. The distance between those plates, that's going to be 3 inches. This is designed to mount onto a straight 3 inch wide trailer tow.
When it comes to the channel width, we're talking about our bracket right here. Externally, outside edge to outside edge is about 3 and 3 8ths. Internally is about 2 and 7 eights. Top to bottom is going to be 12 inches. This is model number DA91. Overall length, front to this portion right here is going to be about 24 inches. These 2 mount holes are separated on center by 3 inches, and the distance between this mount hole to this mount hole on center is 9 and a half inches. Now please keep in mind that because this actuator does not include a reverse lockout, it is recommended that you equip your trailer with 3 backing brakes, that way you can drive and reverse without the actuator triggering your trailer's brakes. That's going to do it for today's look at the Demco Hydraulic Break Actuator.
Ratings & Reviews
exactly what i needed and and it came in 2 business days. I dig it!
It was exactly what my customer needed! Easy to find and priced right.
Exactly as advertised, seems heavy duty, master cylinder was easy to bleed, installed and functional within an hour, hardest part was removing previous old discontinued hits system.
works like it should, just had to drill new holes but i knew that when i ordered it.
We hardly ever receive packing lists with shipments.
Was an exact replacement part. Worked g reat
Part was an exact match and shipping was Fast
The product was as expected. Product aside, I was thoroughly impressed with the customer service from Kim. I placed the order online and Kim called me within a half hour to let me know there was a three to four week lead time, but she had an alternate part for me. She changed the order and called the next day to let me know the parts had shipped. Just excellent service!
The part worked perfectly fast service
great job !
Fast shipping, easy ordering and easy i nstallation
The Demco actuator is a great product for trailers that have hydraulic brakes, we have purchased 6 of these for our concrete mixing trailer and they work great! Also the team at eTrailers provided us with excellent customer service!
PERFECT FIT, EXACTLY WHAT I NEEDED AND FAST DELIVERY!
GREAT! Helped us out in a bind. Ordered on Friday, part showed up in Cali on Tuesday! :)
Works great!
My first Time dealing with EZ Trailer. Great Customer service and fast Shipping !
etrailer is a great, fast delivery, great communications and great customer service!
Fast shipping and no damage in transit, could have used more packing do to the weight of the item so it wouldn’t bounce around. We know thing’s get handled a little ruff with the shipping company’s.
Solid unit, WOW was I impressed! Great company with excellent customer service. Don't think twice go for it!
Good morning , I do sales to the US NAVY, one of my customers asked if I could quote them ON THIS ITEM . With a few pictures (provided by my customer ) I then started my search , locating "etrailer.com "on line and finding the exact item then quoting it, and making the sale . This item will be used by the US NAVY .
so easy to install. i had a harder time getting the old one off.
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