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Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating with a 200-hour salt spray rating. Easy-to-use leverlock coupler fits 2" hitch balls.
Features:
Specs:
Note: Because this actuator does not include a 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.
Sturdy, Corrosion-Resistant Construction
Made of sturdy steel, this hydraulic trailer brake actuator features a durable zinc coating that is designed to limit rust and corrosion. This zinc coat has a 200-hour salt spray rating. In addition, the composite master cylinder is made of corrosion-resistant, glass-reinforced nylon to further ensure durability.
Average Customer Rating: 4.8 out of 5 stars (280 Customer Reviews)
Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating with a 200-hour salt spray rating. Easy-to-use leverlock coupler fits 2" hitch balls.Deliver the Demco Hydraulic Trailer Brake Actuator - Drum Brakes - Zinc Plated - 2" Ball - 6,000 lbs - 8605001 to my mechanic, who is doing a complete overall to my trailer brake system. The product looks very good and was delivered as promised. Thanks, Russ 565180
Russ - 09/14/2019Everything went as it was supposed to. Very satisfied! 575389
Product worked as designed, however; your companies staff person (Sal M) was extremely helpful with options and patients getting my order filled to my expectations and my timeframe. He represented what customer service is all about! Thank You Sal!! Robert Wallace 384207
There is slop where coupler goes into the actuator box. When towing my 20' boat I can feel it bouncing up and down a bit after each bump. I'm considering changing out to different brand as I concerned it will round out the bolt holes and make the slop even worse. 465677
Heather A - 01/12/2018All i can say, that package was delivered very quick! And it was exactly as described in the website. I would totally recommend it to anyone! 384580
Fit perfectly in existing spot. Once hooked up and brakes were bled, worked phenomenally. Would definitely recommend this to anyone needing a new surge brake actuator 613373
The new unit fit perfectly on my 1988 boat trailer. Installation couldn't have been easier - bolt holes lined up exactly. I watched an etrailer video demonstrating the install procedure, and by watching the video I realized that the anti-collapsing spacer tube which goes inside the trailer tongue tube was missing. I made two steel spacers and installed them inside the tongue when I installed the new brake actuator unit. I very happy I made this necessary upgrade. 501067
Aaron - 04/26/2019seems to work fine. had to extend my brake line about 3 inchs, not to big a deal. 134947
carl s - 06/12/2015Demco surge brake actuator Demco brake cluster (2) Product shipped and was received within a couple of days. Finally warmed up enough to tackle this project. My tow-dolly is a 1998 so the job was a little different than the video shows. Had to wrench the bolts all the way out with a cheater ( think Loc-Tite ). Also needed a little help with a hammer to separate hub/spindle from backing plate. Went back together pretty well. New actuator went right into place. Great service. 351344
Etrailer has great service, I ordered this on a Sunday and had it Wednesday. fit perfect I have ordered from them before and always had great service. To get a reply on Sunday that it was ready to be picked up by shipping company, that is service!!! 568964
This was easy to install and works great; I installed it myself on my boat trailer in order to get the brakes to work. The boat is quite heavy (6k lbs) very happy with this product and would recommend. 108884
Highly recommend company! I am pleased with the direct fit of my new hitch. I took the measurements of the trailer tongue 3", bolt holes center to center 3". The hitch is rated for 6k and my pontoon boat and trailer come in at 4.4k. Nice product, heavy duty and much better than factory. Shipping was extremely fast, easy to track with etrailer email notifications. The customer email service is superior to many other companies. 541261
Package arrived as expected. Was exactly what I ordered. Was installed within 1/2 hr. However the packaging lets a little to be desired. Otherwise I'm completely satisfied with my purchase . Will use etrailer for future purshses 266849
Best price on the internet for the whole assembly. I was going to rebuild my old one, but when I saw the price for a new replacement, I went with that. The quality is very good. No instructions came with it, but I found a video on the Etrailer site that showed me how to install the actuator and bleed the brake lines. Be sure to check the brass exit-fitting on the unit for tightness. Mine was very loose. The video does mention to do that. I'd suggest that Etrailer provide more packing when shipping these. Luckily there was no damage but the packing material was sparse. 177655
Installed today. Fit was good with 4-1/2" grade 8 bolts and flange nuts. Had blown out and used my existing brake lines as I was replacing the brakes also. Gravity bleed wasn't working for me, so I rigged up light air pressure from the compressor with the bleeders open to push the brake fluid through the lines. Then with a few times pumping the ball part of the hitch back and forth to the actuator and holding it in with a clamp as to bleed it like an auto brake, the air was bled out and the job was done. 658638
Exactly what I was looking for, perfect fit, great pricing! 665216
I recently ordered a master cylinder and two complete drum brake assemblies for my 1985 Mastercraft ski boat trailer. I received all of the items much quicker that I had expected. The master cylinder was pretty close to being an exact replacement for the 30+ year old assembly I had removed. The drum brake assemblies were exactly the same as the original units saving me a lot of time and money trying to find the parts I would have needed to rebuild the system. 403518
Hi, I haven't installed it yet, but the coupler looks like top quality stuff. I may have trouble with connecting to the break lines (rustyl/old and may need an adapter to go in-between), but that's my problem. Thanks! 327801
Very well built. If you take the two bolts off on top that hold the plate on by the breakaway lever you can then use the lever to bleed the brakes. This was a relacement for a unit with a bad master cylinder. However i had to replace my bolts holding it on because its slightly wider due to double wall construction. Very happy with purchase. 241664
I'm glad I had a pneumatic bleed kit to troubleshoot because several lines were full of sludge. Had a little trouble getting the surge actuator primed. It is best on this unit to take the 2 bolts holding the emergency lockout and then pulling in this device to prime the unit. Made it easy. 654971
I ordered this surge brake unit on Tuesday and received it on Thursday as was promised, great service and great to work with. I replaced another brand with this Demco it bolted wright to my trailer tongue and just had to adjust the brake line a small amount, put brake fluid in and blead the brakes,hooked to my truck and road tested and it worked great. The price was far less then one I could buy local.if in the future I need trailer part's I will buy them here also. 298137
Paul B - 10/17/2017
This was a replacement for the no-longer-available actuator on my '78 trailer. I had it welded on instead of bolting it on; figuring replacement parts will be available for a long time for this actuator. It has worked flawlessly, and was a great value for the price. 542218
Not yet installed but a good quality product. The weight says a lot. Always an easy ordering process and fast shipping. 806252
Easy install. Easy to bleed the system. Tows behind the truck Great 805977
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