Demco Hydraulic Brake Actuator w Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball - 12.5K
(18 reviews)
Price: $477.48
In Stock
Demco Hydraulic Brake Actuator w Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball - 12.5K
Item # DM8104311
Retail:$545.30
Our Price: $477.48
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Demco Brake Actuator - DM8104311
- Surge Brake Actuator
- Disc Brakes
- 2-5/16 Inch Ball Coupler
- 12500 lbs GTW
- Bolt-On
- Electric Lockout
- Straight Tongue Coupler
- Demco
Surge actuator has a rustproof aluminum master cylinder and durable zinc plating. eZ-Latch coupler mechanism makes hookup a snap. Electric lockout activates automatically to keep brakes from actuating when in reverse.
Features:
- Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
- Electric reverse lockout lets you back up without actuating trailer brakes
- Solenoid activates automatically when you shift into reverse
- 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
- 200-Hour salt spray rating
- Heavy-duty, aluminum master cylinder is durable, rustproof, and efficient
- Built for high-pressure applications
- Allows 50 percent greater displacement than standard master cylinders
- Acetyl copolymer lining provides smooth operation as actuator telescopes in and out
- Built-in drop helps you match tow vehicle height
- Breakaway included
- Snap hook on safety cable ensures secure connection to breakaway lever
- Durable steel construction with sturdy, reinforced outer casing
- Bolt-on installation
- Requires 1/2" x 4-1/2" Grade-5 bolts (not included) for mounting
- Made in the USA
Specs:
- Application: trailers with hydraulic disc brakes
- Ball size: 2-5/16"
- Gross towing weight: 12,500 lbs
- Maximum tongue weight: 1,250 lbs
- Mounting: straight, 3" wide trailer tongue
- Drop: 4"
- Model number: DA10
- 1-Year warranty
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.
Electric Reverse Lockout
The electric reverse lockout on this trailer brake actuator is automatically activated when you shift your tow vehicle into reverse. The solenoid wires into your trailer connector - which connects to your tow vehicle - so that it can detect when you are in reverse. When your vehicle is in reverse, the solenoid ensures that the hydraulic actuator does not activate your trailer's brakes, thus allowing you to back up your rig. To use the lockout feature, you must have a 5-pole flat, 6-way round, or 7-pole trailer connector.
eZ-Latch Coupler
The coupler portion of this trailer brake actuator 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.
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. Even the master cylinder is made of rustproof aluminum to further ensure durability.
8104311 Demco DA10 Hydraulic Trailer Brake Actuator for Disc Brakes - Electric Lock-Out - 2-5/16" Ball Easy-Latch Drop Coupler - 12,500 lbs
Installation Details
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
- Wrong item was ordered
- Manufacturer issue
Customer Reviews
Demco Hydraulic Brake Actuator w Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball - 12.5K - DM8104311
Average Customer Rating: 4.8 out of 5 stars (18 Customer Reviews)
Surge actuator has a rustproof aluminum master cylinder and durable zinc plating. eZ-Latch coupler mechanism makes hookup a snap. Electric lockout activates automatically to keep brakes from actuating when in reverse.by: Mike 09/09/2022
Bolted right up exactly like the old one, bled the brakes, hooked up 2 wires save time & $ compared to the original one which was b/o till November. Just haven't found a place to grease it yet
by: Tom 09/07/2022
Fast delivery. Great support.
Was going to re-build old one and it was cheaper to purchase complete new one!
by: Garry05/25/2022
Very fast shipping. Good price and sales help! Thanks
Comments
Great !!
John G - 09/30/2022by: John04/23/2022
Prior to ordering, I was concerned about the length of the brake. Length end to end was provided, but I would have liked mounting area length (8 1/4"), and length behind the mounting (~11 1/4"). Communication was great and they kept me informed.
by: Paul D.05/16/2019
The actuator itself has been operating flawlessly but as previously documented via emails, the backup solenoid failed on the first usage (i.e., wouldn't release the brake fluid pressure when energized). I had to swap out my old solenoid and reuse it so that the actuator was fully functional. It seems that cheaper solenoids are prone to failure and are being installed on new actuators. I disassembled the failed solenoid, connected the solenoid to a 12.5 VDC power source, and found that the electromagnet wasn't strong enough to lift the valve plunger upon energizing when pressurized by brake fluid. I would suggest that the purchasing department return back to the older style, more reliable solenoids. That is why I only gave three stars on this review.
by: Anthony 08/08/2020
Great product but FYI, it is not a direct replacement for the comparable TITAN actuator.
Your brake line may be a few inches too short as mine was.
Super fast shipping!
by: Herb 10/17/2021
Although I had to drill some new holes for mounting I think that this a very good replacement for my old part.
by: Gus R06/25/2020
Experience with Etrailer was great. They sent the part that I ordered and it was not damaged which was a plus. The actuator has been working great since then. I hope to get several years of service from this actuator without any issues.
Thank you Etrailer!
Happy Customer: Gus Rodriguez
by: Mitchell 09/18/2019
Easy ordering online, prompt shipping and delivery. No issues at all. We will order from Etrailer again when parts are required.
Thanks
Comments
The brake actuator works as it should. The mounting points matched up perfectly with the old original unit.
Mitchell - 09/28/2020by: Jeffrey 10/17/2021
Perfect replacement.
by: Ty F.07/23/2020
The break actuator works great and install was easy , after a year on my boat trailer no problems.
by: Carolyn07/14/2018
Great product , Exactly what was expected and got here quickly !
Will reorder from this company !! Need products quickly so we can run our business and keep customers happy!
by: Asith05/01/2021
Correct item as advertised. Very fast d elivery.
by: Dave J10/26/2020
Works great. Easy to install
by: Steven 11/13/2020
Ordered for a friend .
Totally satisfied .
Quick shipping .
by: Brian 08/19/2022
by: Susan 09/15/2020
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See what our Experts say about this Demco Brake Actuator
- What is the Length of the 12.5K Demco Hydraulic Disc Trailer Brake ActuatorThere is one picture that says typical photo. That photo is not what the coupler actually looks like. All the other pictures, included the one here, is what this coupler looks like. I also included a picture showing the measurements you have requested. The overall length is 31-5/8 inches. The length of the housing only is 16-1/4 inches.
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- Fit of Demco # DM8104311 Hydraulic Brake ActuatorThe Demco # DM8104311 is compatible with 3 inch wide straight trailer tongues. You can see our return policy by clicking the provided link.
view full answer... - Is Wiring of Reverse Lockout Solenoid of Demco Surge Actuator Polarity SensitiveThe reverse lockout solenoid wiring of the Demco Hydraulic Brake Actuator part # DM8104311 is not polarity sensitive which means you can use either wire as the power as long as the other is grounded.
view full answer... - Bolt Hole Specs of the Demco Hydraulic Brake Actuator DM8104311The Demco Hydraulic Brake Actuator part # DM8104311 is a fit for trailer tongues 3" wide. If this is what you have then it will work well. If you are however looking for the bolt hole spacing then you can reference the attached photo.
view full answer...
- Replacement Surge Actuator for Trailer with 3 inch Wide Channel and Tandem 5k AxlesYes the Demco Surge Brake Actuator part # DM8104311 that you referenced would work great for your trailer as it is the correct size for your trailer frame and also has the needed weight capacity as well.
view full answer... - Is 12.5k Demco Hydraulic Brake Actuator For Disc Brakes GreaseableI reached out directly to Demco, who told me that grease should never be used on the 12k disc brake actuator you asked about: - Demco Hydraulic Brake Actuator w/ Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball # DM8104311 They said the # DM8104311 has nylon slides between the inner and outer slide tubes that wear like iron and under normal use they will never need to be replaced.
view full answer... - How to Bleed Trailer Brakes Without Access to Underside of ActuatorOnce the Demco Hydraulic Brake Actuator w Drop and Electric Lockout # DM8104311 is installed there isn't really an easy way to access that cylinder since this sits on top of the trailer tongue. Something else you might try doing is using a ratchet strap like the Erickson # 34413 to manually pump the coupler like the instructions call for. Attached is a clip from the linked instructions for you to check out.
view full answer... - What Size Fitting Is on the Demco Hydraulic Brake Actuator DM8104311The Demco Hydraulic Brake Actuator w Drop part # DM8104311 will take a male 3/8"-24 fitting like that on the Demco Hydraulic Brake Hose with Fittings part # DM05982. I am not sure what size fittings you have now but all you would need is an adapter which can be obtained locally.
view full answer... - Replacement Reverse Lockout Solenoid for Demco Hydraulic Brake Actuator DA10Yes, the replacement Demco Solenoid Kit for Brake Actuators # DM5404 that you referenced is designed for Demco DA10 actuators like the Demco Hydraulic Brake Actuator # DM8104311 that you referenced.
view full answer... - Replacement Demco Composite eZ-Latch For 2-5/16" Ball Cast CouplersYes, we have the Demco Composite eZ-Latch Repair Kit # DM6288 that will replace the eZ-latch on Demco 2-5/16" cast couplers like that which comes on the Demco Hydraulic Brake Actuator # DM8104311.
view full answer... - Recommended Coupler Lock To Lock Demco Surge Brake Coupler DM8104311 To Tow VehicleYou absolutely can! To lock the coupler latch of the Demco Hydraulic Brake Actuator # DM8104311 you were looking at to the hitch ball on your vehicle you will need to use the coupler lock # e98887 which gets inserted into the hole on the latch shown in the included diagram. This makes it so that the trailer coupler cannot be removed from the hitch ball, and you can do the same thing when storing the trailer that way no one can hook their vehicle up to the trailer and take it. I included...
view full answer...
- Replacement Disc Brake Coupler for Load Rite Trailer Part 6080.44The Demco Hydraulic Brake Actuator w Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball - 12.5K # DM8104311 will work well as a replacement for your trailer as long as the capacity of the trailer is not greater than 12,500 lbs. My research showed that part rated for 16,500 lbs, so if you need a larger capacity coupler I recommend the Demco Hydraulic Brake Actuator w Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball - 16K # DM8164311 or the 20K # T4750520. These are bolt on replacement...
view full answer... - How to Determine Correct Replacement Hydraulic Brake Actuator for Older Boat TrailerThanks so much for the info as well as the photo, but I took a look and there are no replacement parts for the master cylinder and shock you mentioned, which means the best option is going to be a brand new hydraulic brake actuator. To get the correct actuator you simply need to know if you have hydraulic drum brakes or disc brakes, the GVWR of your trailer, what size hitch ball the coupler needs to accept, and how it needs to mount. For example, if you had hydraulic drum brakes you...
view full answer...
- Disc Brake Upgrade on a 2012 Tandem Axle Boat TrailerI would be happy to help you set up a disc brake system for you 2012 Tandem axle boat trailer. Let's start with an actuator you are going to want the Titan Zinc-Plated Brake Actuator - Disc - 2-5/16" Ball item # T4750800. This is a bolt on actuator that fits 3" channels. It has a 12,500 lbs capacity. I have linked a picture so you can see what it will look like when installed. For your brake lines you are going to want the HydraStar Hydraulic Brake Line Kit - Tandem Axle - 25' item #...
view full answer...
- Replacement Surge Brake Parts for 2004 5 Starr Boat TrailerIt sounds like you have a Demco Actuator to me like # DM8104002. We also have one with a 4 inch drop # DM8104311. Both are Hydraulic Brake Actuators that are rated at 12,500lbs.,has a 2-5/16 inch ball, and bear the DA10 model number. I was able to look up your boat trailer and the parts used between packages varied. I can help you pick out Rotors, Lines, Calipers, and Pads if you can provide me with more information about the current items on the trailer. I will need the number of...
view full answer... - Parts Needed To Add Hydraulic Disc Brakes To TrailerTo add hydraulic disc brakes to your trailer you will need a few parts. For a hub and rotor assembly I recommend the Kodiak Disc Brake Kit - 10" Hub/Rotor - 5 on 4-1/2 - Dacromet - 3,500 lbs # K2HR35D which will allow you to use your 14" wheels and bolts to your 4 bolt brake flange. You will need to confirm that your spindles use inner bearing # L68149 and outer bearing # L44649, but since all of our 14" wheel options use those bearings this should be the kit you need. You will need inner...
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Info for this part was:
Edited by:
Leah B
Written by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Installed by:
Jeff D
Updated by:
Laura H
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