1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. 2 Inch Ball Coupler
  6. 7000 lbs GTW
Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs

Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs

Item # DM72VR
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Our Price: $233.22
Brake Actuator
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Shipping Weight: 20 lbs
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Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating with a 120-hour salt spray rating. EZ-Latch coupler mechanism makes hookup a snap. Bolt-on application. Call 800-298-1624 to order Demco brake actuator part number DM72VR or order online at etrailer.com. Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (27)
  • Q & A (21)
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  • Why etrailer?

Demco Brake Actuator - DM72VR

  • Surge Brake Actuator
  • Drum Brakes
  • 2 Inch Ball Coupler
  • 7000 lbs GTW
  • Bolt-On
  • No Lockout
  • Straight Tongue Coupler
  • Demco

Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating with a 120-hour salt spray rating. EZ-Latch coupler mechanism makes hookup a snap. Bolt-on application.


Features:

  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • EZ-Latch coupler mechanism for simple, secure hookup and disconnect
    • Lets you hook up when latch is in closed position - just drop coupler over hitch ball and latch will snap into place
  • Zinc plating offers corrosion resistance
    • 120-Hour salt spray rating
  • 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
  • Large rear rollers allow for easy movement and smooth operation
  • Breakaway included
    • Snap hook on safety cable ensures secure connection to breakaway lever
  • Heavy-duty steel construction with sturdy, reinforced outer casing
  • Bolt-on installation
    • Requires 2-1/2" x 4-1/2" Grade-5 bolts (not included) for mounting
  • Made in the USA


Specs:

  • Application: trailers with hydraulic drum brakes
  • Ball size: 2"
  • Gross towing weight: 7,000 lbs
  • Maximum tongue weight: 700 lbs
  • Mounting: straight, 3" wide trailer tongue
  • Model number: DA70
  • 1-Year warranty


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.


EZ-Latch Coupler

Cast Coupler Cutaway

This coupler features a simple-to-use latching mechanism known as the EZ-Latch. With this mechanism, hooking up is as easy as dropping the coupler over your trailer hitch ball. The latch does not need to be tugged or manually activated to allow the ball into the coupler socket, nor does it have to be secured in place. Just make sure that the coupler is properly lined up with the ball when you lower it, and the rest is automatic. Disengaging the coupler is just as effortless. Simply lift up the handle and the coupler socket will automatically release its grip on the ball.


Demco EZ-Latch in Use

The contoured, low-profile design of the latch handle helps protect the coupler from damage by allowing any potential hazards - from debris on the road to your ball mount backing into the coupler - to simply slide over the top. This helps prevent anything from getting under the latch handle and releasing the ball, and it can also limit any damage to the coupler should an impact occur


Unlike most couplers, which have a pin hole on the handle latch, the EZ-Latch coupler features a hole on the side of the coupler itself. Inserting a coupler lock through this hole will keep the latch from lifting, preventing disconnect and theft.


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 120-hour salt spray rating. In addition, the composite master cylinder is made of corrosion-resistant glass-reinforced nylon to further ensure durability.



8705001 Demco DA86 Hydraulic Trailer Brake Actuator for Drum Brakes - 2" Ball Easy-Latch Drop Coupler 0 7,000 lbs
Replaces Demco DA86 and 8605001






Customer Reviews

Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs - DM72VR

Average Customer Rating:  4.6 out of 5 stars   (27 Customer Reviews)

Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating with a 120-hour salt spray rating. EZ-Latch coupler mechanism makes hookup a snap. Bolt-on application.

- DM72VR
by:

Bolted right up to the standard 3" spread bolt pattern. One point of caution. See how the steel is doubled up when looking at it from behind? If your old one was not, you will need longer bolts. Just make sure you have 1/2-13 x 4.5" bolts on hand before install. Your old ones may be too short. I had to run to Lowes for bolts to complete install. 5 stars had it come with bolts.



- DM72VR
by:

Nice unit. Two of the holes lined up with my old Attwood unit but looked like it sat a bit high. Instructions as to proper install would have helped. Drilled 3 new holes and good to go. Took a bit of work and bending to get my brake line to connect but worked out fine in the end.



- DM72VR
by:

Great replacement for the (almost) 30 year old Dico actuator, which was completely worn out. The auto locking ball latch is a great feature too.



- DM72VR
by:

Good service and timely delivery of good products. Have the right parts delivered the first time means less headaches. Only shop here for my trailer needs. They have everything.



- DM72VR
by:

Customer service was outstanding. They helped me find what would work for boat trailer. Very polite and had great prices. I will let others know of there great service.



- DM72VR
by:

The fitting on the end of master cylinder was cross threaded. I recapped it. I really hope it doesn't leak, it's too late in the game to get another one, we leave in a week. Have other things to do.



- DM72VR
by:

Fit right on my older double axel boat trailer. Very solid construction. The EZ hitch is actually a very nice feature. Great product.



- DM72VR
by:

This was a great update to meh 1991 Mastercraft Trailer.



- DM72VR
by:

Great product and very easy to install. The holes lined up with the existing ones. I do wish it came with the new bolts as it would make it easier to install, hence the 4 stars.



- DM72VR
by:

worked good. you will need longer bolts to install if replacing an older model.



- DM72VR
by:

Great addition to the trailer!



- DM72VR
by:

waiting on other parts to fully assemble so i can not say to much yet, i did receive the item well packed in a timely manner thank you



- DM72VR
by:

Quality product. Easily replaced my old Atwood 171 coupler. Delivered days before advertised date. I called Demco for some technical information. Although the instruction clearly state to bolt the unit on, Demco advised against welding this coupler to my trailer.



- DM72VR
by:

Amy was amazing! She helped me get the product basically next day. I was in a time crunch and need the product quickly. She’s amazing!



- DM72VR
by:

Great, seamless service as always!



- DM72VR
by:

thank yoy great service



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Ask the Experts about this Demco Brake Actuator

  • Replacement Surge Brake Actuator for Atwood 82543
    The Demco Hydraulic Brake Actuator # DM72VR is the best replacement for your Atwood 82543. As this surge brake actuator does not have a reverse lockout you will need either free backing brake assemblies or a Solenoid Valve for Titan Brake Actuators # T4748800. I recommend the electric lockout option. It will require you to use a 5-Pole Flat Trailer Connector # HM37918 and a 4-Pole to 5-Pole Trailer Wiring Adapter # 47515. If your tow vehicle already has a 5-way you will not need...
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  • Replacement Hydraulic Brake Actuator For Trailrite Boat Trailer With Drum Brakes
    For your Trailrite Boat Trailer I recommend the Demco Hydraulic Brake Actuator # DM72VR. This actuator is zinc coated to resist corrosion and uses a 2" ball coupler with EZ-Latch mechanism for easier hook ups. It will mount similar to your old coupler in the height of the ball matches your current coupler so there will be no need to change your ball mount to level the boat trailer. Currently the only bolt on actuators we have are for a 3" straight tongue. You would need to find some...
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  • How To Bleed Demco DA86 Hydraulic Brake Actuator
    I have attached for you below the bleeding instructions for the Demco DA86 Hydraulic Brake Actuator part # DM72VR. The Powerbuilt Brake Bleeder part # ALL648591 is a handy tool that will assist with this process.
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  • How To Determine If Demco Actuator For Drum Brakes Will Fit
    I can tell you how to go about determining if the Demco Hydraulic Trailer Brake Actuator - Drum Brakes # DM72VR will fit, but we wouldn't know off-hand an actuator fit on a 1985 EZ-Loader boat trailer. Finding out is really simple though, as the only thing you need to do is measure the width of your trailer tongue. This actuator will fit so long as your tongue is 3 inches wide, though it is likely you will have to drill new mounting holes for the actuator, but that will be the case for...
    view full answer...
  • Identifying Free Backing Trailer Brake Assemblies When Replacing Atwood 85778 Surge Brake
    To check for a Free Backing Hydraulic Trailer Brake # AKFBBRK-35 you will need to remove your brake drum assembly. The free backing brakes have a different front brake shoe. This shoe is designed to fall away when the trailer is moving in reverse. The fall away brake shoe will have a pivot point in the shoe that allows it to fall away(See Image). The Demco Hydraulic Trailer Brake Actuator # DM72VR can be used with the free backing brakes as the Demco 8605001 is no longer an active item....
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  • Best Replacement for Atwood 82543 Brake Actuator
    The Demco Hydraulic Brake Actuator part # DM72VR is a great option to replace an Atwood 82543. That said, it does not come with any sort of reverse lockout feature therefore in order to reverse without the brakes locking up you will either need to add an electric solenoid such as the Replacement Solenoid Valve part # T4748800 or switch to free backing braking assemblies. The latter is more expensive and time consuming. Therefore, I recommend the former but you also need to switch to a 5-way...
    view full answer...
  • Mounting Bolt Dimensions of Demco Actuator DM72VR
    On the Demco Actuator # DM72VR the upper holes are separated by 3 inches and vertically they are 2 inches apart.
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  • Options to Replace Atwood 82543 Hydraulic Brake Actuator
    The Demco Hydraulic Brake Actuator part # DM72VR is for drum brakes which is what you need to replace an Atwood 82543. The other options you're inquiring about are for disc brakes which won't work. In short, there are tons of different versions of the Demco Hydraulic Brake Actuator each with different features such as drum/disc brake compatibility, weight capacity, ball size, lockout type etc. The correct one for the Atwood 82543 is listed above. In order to reverse without the brakes...
    view full answer...
  • Is There A Coupler Lock Compatible With The Demco Hydraulic Brake Actuator DM72VR?
    To lock the latch of the Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs # DM72VR you were looking at you will need the etrailer Surge Brake Coupler Lock - 3-3/8" Span - 1/4" Diameter - Chrome # e98888. This lock goes in the hole shown in the included picture and keeps the coupler closed so no one can hook up a hitch ball when the trailer is sitting around, and will also make it so no one can remove the trailer from your hitch ball when it is hooked up to your truck. I...
    view full answer...
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  • Recommended Mounting Hardware for Demco DM72VR Hydraulic Brake Coupler
    The Demco # DM72VR Hydraulic Trailer Brake Actuating Coupler would require four 1/2 x 4-1/2 inch grade 5 bolts to install it on a trailer tongue. I've linked to a product description video as well as a photo with the bolt spacing that you might find helpful.
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    Image 1 for
  • Recommended Surge Brake Actuator For Drum Brakes To Replace Older Atwood 61101 Actuator
    I would be happy to help! You are correct that the Demco 8605001 is a direct replacement for your Atwood 61101 Surge Brake Actuator, but the 8605001 has been discontinued by the manufacturer and replaced with the # DM72VR you mentioned. The key differences between the 8605001 and # DM72VR are that the # DM72VR has a slightly higher weight capacity at 7000lbs and uses an EZ latch coupler mechanism as you mentioned, but will still be a direct replacement for your current actuator. If...
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    Image 1 for
  • What Is The Difference Between A Disc Brake and Drum Brake Surge Brake Actuator?
    The difference between the Demco # DM62VR for disc brakes and the Demco # DM72VR for drum brakes is the pressure each one operates at so that why they cannot be interchanged. Disc brakes require 1600 PSI where drums like what your trailer has require around 1000 PSI. For a surge brake actuator compatible with drum brakes and a reverse lockout solenoid I recommend going with the Dexter DX7.5 Drop-N-Go Brake Actuator - Drum Brakes - 2" Ball - Zinc Plated - 7,500 lbs # 099-175-00 which...
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  • Hydraulic Trailer Drum Brakes For 7 Inch Drums and 10 Inch Wheels on Tandem Axle Trailer
    We do have an option for hydraulic drum brakes that fit a 7 inch drum and are compatible with 10 inch wheels, which are the following: - Dexter Hydraulic Trailer Brake Kit # 23-398-399 This is the entire kit that includes both the left and right hand brakes, as well as the mounting hardware needed for the installation. For a tandem axle trailer you will need a pair of these kits. If you also need brake lines we have that as well depending on the length you need: - 18 Feet: Kodiak...
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  • Replacement Surge Brake Actuator For Atwood 61101
    Atwood is no longer in business, which means replacement parts are unfortunately no longer available for your Atwood 61101 surge brake actuator. The best option available if yours is no longer working is to replace the actuator, which you can do with either of the following models, depending on if you have drum brakes or disc brakes. - Drum Brakes: Demco Hydraulic Brake Actuator # DM72VR - Disc Brakes: Demco Hydraulic Brake Actuator # DM62VR Both of these actuators are bolt-on...
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  • Parts Needed to Add Hydraulic Surge Drum Brakes
    You are correct about the parts you need in order to add hydraulic surge drum brakes to your trailer, and the first thing you need is the right hub and drum. In order to find the correct replacement hubs for your trailer you need to know the weight rating of your axle, and also what bearings your current hub has. You will need to take apart your current hub assembly and look at the bearings themselves; wipe away the grease and you should be able to see the part number stamped directly...
    view full answer...
    Image 1 for Image 2 for
  • Parts Needed to Add Hydraulic Brakes to Boat Trailer
    I may have a solution for you, but you would need to verify the bearings that are in the hubs that are currently on your trailer and the pattern of the brake mounting flange on your axle; if there is not a brake mounting flange present then you would either need to replace the axle completely or have a brake mounting flange welded on to the axle. You can purchase a brake mounting flange and have a qualified welder weld them to the axle. When a brake mounting flange is welded to an axle,...
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  • What Mounting Hardware To Bolt Demco Hydraulic Brake Actuator DM8608601 To Trailer Tongue
    The Demco Hydraulic Brake Actuator # DM8608601 you were looking at requires 1/2" x 4-1/2" Grade 5 Bolts to mount it to the tongue of your trailer. The # DM8608601 was actually discontinued recently so I recommend going with the Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs # DM72VR instead. The # DM72VR requires the same 1/2" x 4-1/2" Grade 5 bolts to mount it to the tongue. I included a video of the # DM72VR for you to take a look at.
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  • Will the Titan Solenoid for Brake Actuators Work with Demco Hydraulic Brake Actuators
    Yes, the Replacement Solenoid Valve for Titan Brake Actuators with Reverse Lockouts part # T4748800 will work with the Demco Hydraulic Brake Actuator part # DM72VR.
    view full answer...
  • Recommended Replacement Hydraulic Surge Brake Actuator For Drum Brakes on 2020 Jayco 12 tent trailer
    I recommend replacing your entire brake actuator on your 2000 Jayco 12 tent trailer. The Demco Hydraulic Brake Actuator # DM72VR is a bolt on actuator that will mount to your 3" channel like the Atwood 85830. This is the best route to go as it is nearly impossible to find any parts for the Atwood actuator since it has been out of production for so long. The etrailer Hydraulic Trailer Brake Kit # AKUBRK-35 is compatible with the Demco actuator I recommended.
    view full answer...
  • How to Determine What Style Brakes a Trailer Has
    Surge brakes actually has to do with the trailer, not the brake controller. If you take a look at the Demco Surge Actuator # DM72VR, the coupler will push back into the body of the actuator which then pushes a piston that compresses brake fluid and engages the brakes. There are quite a few weight distribution systems that do not allow use with this style of braking system and is a pretty common issue. The Curt Spectrum # C51170 is a pretty well liked controller that will work with electric...
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  • Recommended Replacement Solution for Atwood 82543 Hydraulic Actuator
    Considering that you've flushed the brake lines, we can rule out a clog causing this issue and because you've already replaced the master cylinder, it's not outside of the realm of possibilities that the actuator just needs to be replaced. You could check the actuator bolt/shock on the coupler mechanism as that might be what's sticking and creating this issue, but as you've seen, replacement parts for Atwood couplers are difficult to come by. For this reason, I do recommend simply replacing...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Written by:
Mike S

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