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  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. 2 Inch Ball Coupler
  6. 8000 lbs GTW
Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 8,000 lbs

Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 8,000 lbs

Item # DM8609101
Our Price: $276.24
Brake Actuator
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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. Trigger-style coupler latch is easy to use. Bolt-on application. 1-800-940-8924 to order Demco brake actuator part number DM8609101 or order online at Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 8,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (8)
  • Q & A (0)
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Demco Brake Actuator - DM8609101

  • Surge Brake Actuator
  • Drum Brakes
  • 2 Inch Ball Coupler
  • 8000 lbs GTW
  • Bolt-On
  • No Lockout
  • Agricultural
  • Construction
  • Marine
  • Travel Trailer
  • Utility Trailer
  • Demco

Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating with a 200-hour salt spray rating. Trigger-style coupler latch is easy to use. Bolt-on application.


  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • Leverlock coupler mechanism ensures simple, secure hookup and disconnect
    • Trigger-style latch is easy to use
  • Zinc plating offers corrosion resistance
    • 200-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
  • Acetal copolymer lining provides smooth operation as actuator telescopes in and out
  • Breakaway included
    • Snap hook on safety cable ensures secure connection to breakaway lever
  • Heavy-duty steel construction
  • Bolt-on installation
    • Requires 1/2" x 4-1/2" Grade-5 bolts (not included) for mounting
  • Made in the USA


  • Application: trailers with hydraulic drum brakes
  • Ball size: 2"
  • Gross towing weight: 8,000 lbs
  • Maximum tongue weight: 800 lbs
  • Mounting: straight, 3" wide trailer tongue
  • Model number: DA91
  • 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.

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.

8609101 Demco DA91 Hydraulic Trailer Brake Actuator for Drum Brakes - 2" Ball - 8,000 lbs

Customer Satisfaction Score:

Customer Reviews

Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 8,000 lbs - DM8609101

Average Customer Rating:  4.9 out of 5 stars   (8 Customer Reviews)

Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating with a 200-hour salt spray rating. Trigger-style coupler latch is easy to use. Bolt-on application.


Item is heavy duty and well made. It fit perfectly over my 3" trailer tongue (after much grinding to remove the old welded-on actuator).
Item could have been better packed for shipping. It is quite heavy, but had only wadded up paper to cushion it.
It bounced around in transit and the plastic plug protecting the output port of the master cylinder was damaged,


working very well, I really like how it just drops on and hooks up


Works cool


nice heavy duty well built actuator, a little modification from my prior actuator but, doable.


Nice and tough.happy with the purchase b





See what our Experts say about this Demco Brake Actuator

  • Installation and Mounting for the Demco Hydraulic Brake Actuator
    I looked on Demco's website and was able to pull some information and diagrams on how you would mount the Demco Hydraulic Brake Actuator item # DM8609101. I have attached them below. I was not able to find any pictures of this Actuator installed. The installation is pretty straight forward though. It mounts to the top of a 3" wide trailer tongue with three 1/2" x 4-1/2" grade-5 bolts. These bolts are not included. This kit does not include a lock out kit so you will need the Manual Reverse...
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  • Replacement For Atwood 83000, 83010 Drum Brake Actuator & 10 Inch Free Backing Drum Brakes
    So the Atwood 83000, 83005, 83010 brake actuators are obsolete, and Atwood is no longer in business so there isn't a replacement master cylinder. You'll need to replace the whole actuator, and for one like the Atwood with the same 8,000 lb capacity that connects to a 2 inch hitch ball and mounts to a 3 inch trailer tongue, use the following from Demco: - Demco Hydraulic Brake Actuator # DM8609101 I do recommend sticking with drum brakes as there isn't a set of disc brakes for your spindle,...
    view full answer...
  • Option For Replacing Swing-Away Actuator On A 2005 Mastercraft Boat Trailer
    We do have a potential solution for you. Unfortunately, the swing away actuators like the one on your 2005 Mastercraft trailer have been discontinued, so I am afraid there is no direct replacement, or anything that will fit inside the current swing away. At this point we would have to recommend replacing the tongue of the trailer entirely, all the way down to the swing away. For a replacement option I recommend the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout # DX89FR. This has...
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  • Difference Between Titan T63FR and T4500600 Hydraulic Trailer Brake Actuating Coupler
    There is no difference between the Titan # T63FR and T4500600. The T4500600 is Titan's part number, and # T63FR is the part number we use. Same product, different part number.
    view full answer...
  • Replacement Demco DA91 Surge Brake Actuator For a Atwood 83000 Drum Brake Actuator
    The drop on the Demco Hydraulic Brake Actuator # DM8669112 is only moving he coupler lower so you will not need as large of a rise on the tow vehicle. We do have the Demco Hydraulic Brake Actuator # DM8609101 without a drop that has all the same features. They both are rated for a tongue weight up to 800lbs, trailer weight up to 8,000lbs, have a 2" coupler, zinc coated, rated for drum brakes and have the same bolt pattern.
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  • coupler
    Are you basically asking how much length would this coupler add to the tongue of your trailer?
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  • Does Demco EZ Latch Surge Coupler Have Locking Mechanism
    Hey Eric, the Demco surge actuator part # DM8609101 that you referenced is a really nice coupler setup that once dropped onto a ball locks to it until you pull the lever up on it to release it. But we also have a lock that would prevent it from getting released by a thief if that is what you meant with the InfiniteRule part # IR66FR. When the pin is inserted the latch can not be lifted up.
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  • What Are The Mounting Hole Dimensions Of The Demco Hydraulic Surge Brake Actuator DM8609101
    We sure do! The Demco Surge Brake Actuator # DM8609101 you were looking at has mounting holes that are 3" apart from the front hole to the second hole, 9-1/2" apart from the second hole to the last hole, and 12-1/2" apart between the front and rear holes as you can see in the included diagram.
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    Image 1 for
  • Which Reverse Solenoid Will Work With Demco Hydraulic Brake Actuator # DM8609101
    The Reverse Lockout Solenoid for Demco Hydraulic Brake Actuators # DM11993 is the correct solenoid for your Demco Hydraulic Brake Actuator # DM8609101. The solenoid will fit Demco models DA10, DA20, and DA91. This solenoid has a non-bypass configuration which allows you to install the solenoid without drilling into your master cylinder. I linked an installation video of the reverse solenoid being installed. If you have any further questions please feel free to reach back out to me anytime...
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  • Replacement Brakes for Sailboat Trailer With 3500 lb Single Axle
    A 3500 lb axle would typically use a L68149 inner and L44649 outer wheel bearing and the hub would have a 5 on 4-1/2 inch bolt pattern so you'll want to confirm that by pulling a hub and getting the reference numbers off the cages of your existing bearings. If this is what you have, then you do indeed have a 3500 lb axle and the parts I recommend below will be based on that assumption. If the above is true, you'll have 10 inch brake assemblies, and I'd recommend # 40716-15 galvanized brake...
    view full answer...
  • Can You Convert Tie Down Engineering LP8500 from Disc to Drum
    I do have an option for you but in order to switch an actuator from disc to drum brakes you'd need a new master cylinder. Unfortunately, we don't have any replacement parts for the Tie Down Engineering LP8500 as it's discontinued. Therefore, your only option is a full replacement for which I recommend the Demco Hydraulic Brake Actuator part # DM8609101.
    view full answer...
  • Replacement Hydraulic Drum Brake System for a Single Axle Magic Tilt Boat Trailer
    Yes, you have done your research well. These parts will fit together and allow you to back up without needing anything else. I can confirm that Demco Hydraulic Brake Actuator item # DM8609101 will work with the Hydraulic Trailer Brake Kit - Uni-Servo - Dacromet - 10" - Left/Right Hand Assemblies - 3.5K item # AKUBRK-35-D. These brake assemblies are compatible with the Easy Grease Trailer Hub/Drum Assembly for 3.5K Axles - 10" Diameter - 5 on 4-1/2 - Galvanized item # AKHD-545-35-G-EZ-K....
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  • Will 6,000 lb Surge Brake Actuator for Drum Brakes Work on Single Axle Boat Trailer
    The Demco Hydraulic Brake Actuator # DM8609101 will work great for you; the 8,000 lb tow rating and 800 lb tongue weight rating are just the maximum capacities for the actuator and you won't have an issue with your single-axle boat trailer being under that weight rating. The Demco # DM8609101 actuator is designed for use with trailers that have drum brakes and it will fit a 2 inch hitch ball, which you'll want to also keep in mind.
    view full answer...
  • Recommended Replacement for a Atwood 82543 Brake Actuator
    Our highest tongue weight capacity for an actuator that fits a 2" ball is the Demco item # DM8609101. This has an 8,000 lbs capacity with an 800 lbs tongue weight. The Demco Hydraulic Brake Actuator item # DM72VR you were looking at is typically what we recommend to replace that old Atwood 82543 actuators. If you need a 900 lbs tongue weight capacity actuator you will have to upgrade to one that is for a 2-5/16" ball. You would want the Demco Hydraulic Brake Actuator item # DM8102511....
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  • How to Bleed Demco Surge Brake Actuators
    I attached a picture that shows how all Demco surge actuators like the # DM8609101 should be bled.
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    Image 1 for
  • Replacement Parts For Surge Drum Brake Actuator
    I will be able to help you with the parts you need based on your axle capacity. Your axles are rated at 3,200 lbs. You will need the following items for your surge brakes. You have a hydraulic brake actuator. If you are using a 2" ball with your boat trailer, you can replace your existing actuator with the Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 8,000 lbs, part # DM8609101. While it is rated for 8,000 lbs, if your trailer is only rated for 4,000 lbs, you must adhere to...
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  • What Hydraulic Brake Actuator do You Recommend for My Military Trailer Model M1102?
    For the available specs I have available for your M1102 military trailer, the trailer itself has drum brakes with a maximum GVWR of 4200 pounds. The specs also indicate that the trailer already has free-backing plates. With that information and the additional factor of a 3-inch wide tongue, I recommend the Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 8,000 lbs # DM8609101. This actuator comes with zinc plating for corrosion resistance and includes a lever lock coupler mechanism...
    view full answer...
  • Info Needed to Pick Out Replacement Hub for Trailer
    Hey Jac, I don't have a way to look up what your trailer has but we can still help. if you can get the axle capacity that would be basically all I need to know. You can do this by looking at the sticker/plate that is on the axle or you can pull a hub and get me the bearing numbers from inside the hub or the diameter of the spindle where the bearings ride. I also attached a link to a page that will walk you through adding brakes to a trailer that will be helpful as well.
    view full answer...
  • My Brakes Are Activating When I Reverse Uphill What Can I Do?
    This likely means your hydraulic brake actuator does not have a reverse lockout. Reversing the trailer up an incline compresses the actuator and activates the brakes. Adding a lockout allows you to backup without actuating the brakes. We have the reverse lockout solenoid # DM11993 that can be added to your actuator. This will be wired to your reverse light circuit and will lock out the actuator when you are in reverse. We also offer actuators like the # T63FR which can be locked out manually.
    view full answer...
  • Solution for Replacement Hydraulic Brake Actuator on U-Haul Trailer With 4 Wide Tongue
    I do have a solution, but we do not have a bolt-on actuator for a 4" wide trailer tongue. What you can use is the # DM8759922 along with # DM12688-95. This brake actuator can be welded on top of the trailer tongue. You will need to take it to a certified welder for installation.
    view full answer...
  • Replacement Surge Brake Actuator for 1972 Sprite Musketeer European
    I wasn't able to find a lot of information on the 1972 Sprite Musketeer European, but from old pictures it looks like you will need an A-frame brake actuator like the # DM8609502. If you're able to bolt one on, you could use the # DM8609101 instead which fits a 3" wide tongue. The pictures I was able to find were pretty low quality so I can't quite tell. If you also need replacement brake lines, you can use the Kodiak Hydraulic Brake Line Kit - Single Axle - 18' # 18SI-BLKIT. If you're...
    view full answer...
  • Parts Needed To Use Electric Drum Brakes On Tow Dolly
    Since your tow dolly has electric drum brakes you only need 7-way wiring along with a brake controller like # RED52VR in your tow vehicle to use the brakes. If you don't already have a 7-way on your vehicle you will need to add one. If you can let me know which vehicle you have there is likely a custom 4-way wiring harness you can use. You could also use the splice-in Curt # C59236 which is a universal 4-way. Once you have a 4-way installed you can upgrade to a 7-way using the Universal...
    view full answer...

Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jackie C
Expert Research:
Jackie C
Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Michael B
Installed by:
Michael B
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Carrie F
Updated by:
Carrie F

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