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This actuator comes with a primed steel housing so it’s ready for welding onto a 50-degree A-frame trailer. Since the exterior isn’t painted yet, you can weld it without worrying about heat damage or cleanup afterward. Once it’s mounted, just paint it to match your trailer and it’s good to go. The heavy-duty steel construction gives it long-term strength for an 8,000 lb gross towing weight and 800 lb maximum tongue weight.
The composite master cylinder uses glass-reinforced nylon that resists rust and corrosion better than steel or aluminum. Inside, a large reservoir holds more brake fluid, which helps keep your system supplied on long trips and reduces the risk of running low. The automotive-style diaphragm cap seals out air and moisture so the fluid stays clean and the brakes stay responsive.
You can feel how smoothly this actuator works thanks to the acetal copolymer lining that lets it telescope in and out without friction. When your tow vehicle slows down, the surge design compresses the actuator to apply hydraulic pressure to the drum brakes automatically. It’s a simple mechanical setup that delivers steady braking power every time you need it.
The built-in 8" adjustable channel makes it easy to match your coupler height to your setup. It gives you three mounting positions for a variety of coupler types (sold separately), including ball, lunette ring, or clevis attachments. That means you can fine-tune your trailer height so it tows level and tracks straight behind you.
A breakaway feature is built right into the actuator for an added layer of protection on the road. If the trailer ever separates from the hitch, the breakaway mechanism activates automatically to apply the brakes and bring things to a stop. It’s one less thing to worry about when you’re hauling heavy loads or navigating steep grades.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello everybody this is Jeff with etrailer.com. Today we're gonna take a look at the Demco A-Frame Hydraulic Drum Brake Actuator, with the eight inch adjustable channel center position, with an 8,000 pound gross towing weight capacity. Now this actuator here is designed to fit a 50 degree, you see right here, A-frame trailer. And this hydraulic actuator will activate your trailer's brakes when the tow vehicle slows or stops. Basically what happens is when you apply the brakes in your tow vehicle deceleration occurs, and the momentum will push your trailer toward the rear of your vehicle. And with the surge brake system this actuator is then triggered as your trailer moves forward once your tow vehicle starts to slow down.
And when that happens this actuator will contract and apply force to the master cylinder which is located in the back here. And then this in turn supplies the necessary hydraulic pressure to engage your trailer's brakes. Now this actuator here uses on the inside an acetal copolymer lining that'll provide a nice, smooth operation as the actuator telescopes in and out. Up front you can see it has the adjustable channel offers three different mounting positions for your coupler. Now the coupler is not included, we do sell that separately on a website.
Just to give you a dimension on the channel itself the overall height of it; bottom to top is eight inches and the inside width on it is right at three inches wide. Now this is a heavy duty steel construction has a nice prime finish to it for better corrosion resistance. The very back here we mentioned the master cylinder, it is a composite master cylinder. It's very durable and efficient they use glass reinforced nylon construction that'll resist rust and corrosion, and it offers a very large reservoir which provides increased capacity for the brake fluid. You notice at the top here it does have an automotive styled diaphragm cap which will create a completely enclosed system, helps prevent contamination of the brake fluid.
It does include the breakaway cable with the hook and the latch, and this breakaway cable is required by law and the reason is it prevents a trailer runaway situation. So basically when you trailer hooks up to your tow vehicle what you'll do is take this hook with the latch on it and hook that also to the tow vehicle. So if that hook to the tow vehicle what would happen is if your trailer by chance would break loose from your tow vehicle it would pull on this cable, which would activate the lever and apply pressure in the master cylinder which would again, apply the brakes on your trailer. So this breakaway kit will prevent a trailer runaway situation. Now this is a well done installation.
As we mentioned before, you can see it's designed amount to a 50 degree A-Frame trailer, it is made in the USA and it is designed to work on trailers with the A-Frame and the hydraulic drum brakes, gross towing weight capacity on this is 8,000 pounds an actual tongue weight of 800 pounds. One last note I do wanna mention at the very back here because this actuator does not include a reverse lockout. It is recommended that you equip the trailer with either reverse lockout solenoid, which would screw into the back of the master cylinder here or to have free backing brakes on your trailer so that you could drive in reverse without the x-ray or triggering your trailer's brakes. But that should do it for the review on the Demco A-Frame Hydraulic Drum Brake Actuator with the eight inch adjustable channel in the center position at an 8,000 pound gross tongue weight capacity..
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Daniel
7/6/2021
Great product!!! Would reccomend
Alex F.
9/10/2020
12.500 clamshell surge works execellent thks
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Rcmedic
8/16/2021
I am very happy. It works great.