bing tracking image
  1. Flat Tow Brake System
  2. Demco
  3. Air Brakes
  4. Fixed System
  5. Brake Systems
  6. Proportional System
Demco Air Force One Flat Tow Brake System for 2021 and Newer Freightliner Chassis RVs w/ BrakeSync
Demco

Demco Air Force One Flat Tow Brake System for 2021 and Newer Freightliner Chassis RVs w/ BrakeSync

Part Number: DM23MV
In Stock
$1,205.00
Retail:$1,431.00
You Save: $226.00
Flat Tow Brake System
Add to cart
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Complete the factory prep package on your 2021 or newer Freightliner chassis motorhome so you can flat tow your vehicle with the Air Force One supplemental braking system. Includes all needed components and the convenient wireless Coachlink monitor. 1-800-940-8924 to order Demco flat tow brake system part number DM23MV or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Air Force One Flat Tow Brake System for 2021 and Newer Freightliner Chassis RVs w/ BrakeSync. Flat Tow Brake System reviews from real customers.
  • All Info
  • Reviews (452)
  • Q & A (0)
  • Photos

Demco Flat Tow Brake System - DM23MV

  • Air Brakes
  • Fixed System
  • Brake Systems
  • Proportional System
  • Demco
  • One-Time Setup
  • Power Assist Brake Compatible
  • Vehicle Battery
  • Indicator Lights

Complete the factory prep package on your 2021 or newer Freightliner chassis motorhome so you can flat tow your vehicle with the Air Force One supplemental braking system. Includes all needed components and the convenient wireless Coachlink monitor.


Features:

  • Complete the BrakeSync prep package on your Freightliner RV so you can flat tow your vehicle
  • Get the safest and most even braking while flat towing
    • Uses the air pressure from your RV's brake line to apply the towed car's brakes at the same time, with the same intensity
    • Applies brakes only when needed: no false braking
  • Plug in and go
    • System automatically turns on when you connect your towed car to the RV
    • Low-profile components install permanently and stay tucked out of sight
  • Monitor your towed car's braking from the cab of your RV with the wireless Coachlink
    • LEDs light up and alarm beeps when the brakes are applied
    • Transmitter connects to reed switch on brake of towed car to ensure accurate reading
  • Avoid damage from over-braking: reactivates car's vacuum-assisted braking
  • Protect your motorhome: system meets FMVSS safety guidelines for motorhomes that use air brakes
  • Get everything you need: includes breakaway switch, coiled BrakeSync-specific air hose, and all necessary components
  • Made in the USA


Specs:

  • Application: 2021 and newer Freightliner chassis motorhomes with BrakeSync
  • Compatible with hybrids and other cars with continuous-power-assist brakes
  • Coiled air hose length when fully stretched: 7'
  • Breakaway cable length when fully stretched: 7'
  • 5-Year warranty


How Does the Demco Air Force One Work?

The Demco Air Force One offers truly proportional braking for the safest and most comfortable flat towing experience. Proportional braking means that when you apply the brakes in your RV, the braking system will engage the brakes of your toad (towed vehicle) at the same time and with the same intensity. Whether it's a gradual slow down to a red light or a sudden stop in an emergency, your toad and RV will brake together.


Demco Air Force One Supplemental Braking System

To achieve this, the Air Force One ties directly into your motorhome's air brakes and uses the same air pressure that results from you pressing the brake pedal in your coach to pull down the brake pedal in your toad. The result is uniform, real-time braking that exactly mirrors your RV.


To deliver the pressurized air needed to activate your toad's brakes, the coach air connection assembly taps directly into your RV's air brake lines.


Demco Air Force One air tank diagram

A pressure protection valve collects air from your RV's supply air line and stores it in an air reservoir tank so that it's ready to use when you need it. This 1-way check valve ensures that your RV's air lines maintain consistent pressure so that your motorhome's brakes will not be affected by the Air Force One. It meets Federal Motor Vehicle Safety Standard (FMVSS) guidelines requiring that supplemental braking systems use a separate air supply and activation relay valve.


On the other side of the air tank, the service relay valve taps into the coach's metered air line and the delivery relay valve connects to the quick-disconnect air valve on the back of the motorhome. All of the above components will come factory-installed on your 2021 and newer Freightliner coach with BrakeSync.


Main unit of Air Force 1

When you press the brake pedal in your RV, the same pressure that is sent to the brakes is sent to the air connection assembly through the service relay valve. The delivery relay valve then sends the pressurized air to the operating unit via the coiled jumper hose connecting the RV and toad. The main operating unit, mounted under the hood of the toad, receives the air from the coach and sends it to the actuating cylinder that attaches to your vehicle's brake pedal. The cylinder will pull the pedal down and apply the brakes.


Demco Air Force 1 cylinder mounted on brake pedal

With this system, the brakes are applied in the toad at the same time, with the same amount of pressure as in the motorhome. This is what makes it truly proportional.


Vacuum-Assist Braking Means Natural Braking

When you're driving, your vehicle uses vacuum pressure to create the force needed to bring the car to a stop. On most vehicles, this vacuum-assist function does not work when the engine is off. As a result, a lot of supplemental braking systems have to use an excessive amount of pressure to brake the toad.


The Air Force One, on the other hand, reactivates your car's vacuum-assist function by tying into its vacuum line and using the air pressure from the RV to create the needed vacuum. This way your car will brake evenly and naturally as it's being towed, so there's less risk of damage.


Installing the Air Force One

The Air Force One comes in 3 main pieces: the coach air connection assembly, the operating unit, and the actuating cylinder. Your 2021 or newer Freightliner chassis motorhome with BrakeSync comes with the coach air connection assembly pre-installed, so half of your installation is already taken care of.


Where to mount operating unit of Air Force 1

The operating unit will typically install under your car's hood. It's designed with a low profile so you can easily find somewhere to put it. Once the unit's mounted, you'll connect the air lines and splice the wires to the breakaway switch, which you'll need to install on the front of your toad. The unit connects to the coach air assembly using a coiled air hose, also called a jumper; you'll plug it into the quick-connects at the same time as you hook up your tow bar. The jumper included in this kit is Brake Sync-specific.


Air Force 1 actuator on brake pedal

The final piece is the actuating cylinder, the part that actually presses the brake pedal down. It will mount permanently to the arm of the brake pedal and anchor to the firewall. Though it is permanent, it will not interfere with everyday driving. In most vehicles, it is tucked up where you can't even see it.


It connects to the operating unit via an air hose you'll need to run through the firewall. In most cases, you can cut a slit in the hood release cable grommet to pass it through. Either way, you shouldn't have to do any drilling to get the air line hooked up.


Built-In Safety Features

Wireless Coach Link for the Air Force 1

Included in this kit is the wireless Coachlink for safety and peace of mind. This monitor, sitting on the dashboard of the RV, will light up and beep whenever your toad is actively braking. This will give you a simple and convenient way to keep tabs on when the system is working properly or if something goes wrong.


Most supplemental braking systems have a method of letting you know you when they activate, but not all of them are checking if the toad is actually braking. There could be an error that causes the system to activate without actually applying the toad's brakes. Or your brake pedal might be continuously depressed when they shouldn't be, but you won't know it until the damage is already done. This monitor, however, connects directly to a reed switch on the actuator so it only lights up when the pedal is depressed.


Aire Force One breakaway switch

The Air Force One also comes with a breakaway system. The breakaway system ensures that your car will come safely to a stop if it accidentally detaches from the RV while you are towing. A switch mounts to the front of the towed vehicle. This switch - which wires to the operating unit - includes a pin that connects to your RV's hitch receiver with a breakaway cable. If the car separates, the cable pulls the pin from the switch, triggering the system. A reserve air supply stored in the operating unit will apply your towed car's brakes. This system also has total coach protection built in: if there is separation, the motorhome's air supply gets sealed off, so its brakes will continue to function as normal.


What You Need to Flat Tow

Flat towing can be a much more convenient way to take your car RVing with you than using a trailer or a tow dolly. It'll save you storage space both at home and at the campsite, and it takes less time and hassle to hook up.


To flat tow your vehicle, there are 5 basic components you're going to need: a tow bar, a base plate kit, a safety cable set, tow bar wiring, and a flat tow braking system.


For the RV Between the RV and Towed Car For the Towed Car
Hitch Tow bar Base plate
Wiring plug Safety cables Braking system
Wiring adapter cord Wiring kit/diodes

The custom-fit base plate installs on the frame of your toad so you can connect the car to your RV with a tow bar. Hook up safety cables between the vehicles to ensure that the toad does not separate from the motorhome if the tow bar becomes detached. Tow bar wiring syncs your vehicle's signal lights with your motorhome's tail lights, as required by law in most states. Finally, the flat tow braking system - also required in most states - activates the brakes in the toad when you hit the brakes in the RV, making for smoother, safer braking, and preventing wear on your motorhome.



9599020 Demco SBS (Formerly SMI) Air Force 1 Supplemental Braking System for Freightliner Chassis Motorhomes with Brake Sync

Installation Details DM23MV Installation instructions


California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.8

452 reviews
Complete the factory prep package on your 2021 or newer Freightliner chassis motorhome so you can flat tow your vehicle with the Air Force One supplemental braking system. Includes all needed components and the convenient wireless Coachlink monitor.

by:

Everything worked and fit perfect, along with tech service I am very happy. Thanks.



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:



by:


25
452
Show More Reviews

See what our Experts say about this Demco Flat Tow Brake System

  • Recommended Flat Towing Set Up for a 2023 Ford Bronco Pulled by a Motorhome w/ Air Brakes
    Congrats on the new motorhome! I was looking at the features that came with your 2024 Dynamax Dynaquest XL. It does not look like it came prepped for a flat towing set up so you're going to need the Demco Air Force One Flat Tow Brake System for RVs w/ Air Brakes item # SM99243. Now if you do end up having the BrakeSync set up you'll want the item # DM23MV you were looking at but I did not see it as an option. For a Blue Ox tow bar, I recommend the Blue Ox Alpha 2 Non-Binding Tow Bar item...
    view full answer...
  • Flat Tow Parts for a 2025 Jeep Grand Cherokee Overland
    Hey Eddie, thanks for reaching out! It looks like you were already able to get the following parts in an order: - Roadmaster Direct-Connect Base Plate Kit # RM77ZR - Roadmaster Nighthawk All-Terrain # RM-676 - Smart Diode Kit # RM47ZR - Tow Bar Cover # RM-055-3 - Battery Charge Line Kit # RM-156-25 - Tow Defender # RM-4750 - Demco Air Force One # DM23MV I really like all of the parts that you ordered, and from what I'm seeing you aren't missing anything! Let me know if you end...
    view full answer...
  • Replacement Caps For Demco Air Force One Supplemental Braking System Air Fittings
    Hey Ralph, Demco offers replacement covers for the vehicle side with part # SM99608. If you ever need the motorhome side then you'll want part # SM99609 as well.
    view full answer...
  • Recommended Towed Vehicle Air Force One Supplemental Braking System for Diesel Motorhomes
    Congrats on your new purchase! Yes, there are three options for the tow vehicle only side of the Demco Air Force One Supplemental Braking System for Motorhomes with Air Brakes item # SM99243. Which one you need will depend on the year, make, and model of your new motorhome because they all have different connectors. I have listed the options below: 2021 and Newer Freightliner Chassis Motorhomes with BrakeSync - Demco Air Force One Braking System item # DM23MV 2020 and Newer Tiffin Chassis...
    view full answer...
  • What is the Purpose of the Air Tank on the Demco Air Force One Supplemental Braking System?
    The air tank for the Demco Air Force One item # SM99243 is used to collect reserve air from your motorhome's air brake system. It ensures there's the right amount of pressure on demand to operate the actuator. Depending on what type of motorhome you're using you may not need a system with an air tank. I have listed the three options below: 2021 and Newer Freightliner Chassis Motorhomes with BrakeSync - Demco Air Force One Braking System item # DM23MV 2020 and Newer Tiffin Chassis Motorhomes...
    view full answer...
  • Parts Needed To Flat Tow a 2024 Jeep Wrangler Unlimited Behind a Freightliner Chassis Motorhome
    First I recommend using the Roadmaster Direct-Connect Base Plate # RM-521453-5 on your 2024 Jeep Wrangler Unlimited. This will pair with their Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar # RM-676. You will need to measure the height of the receiver on your 2024 Newmar Kountry Strar 3709 to determine if you will need a high-low adapter to keep the bars within 3" of level. The baseplate will have a height of 16-1/4" on stock tires. We have adapters like the 4" # RM-048-4 if your...
    view full answer...
  • How To Know If Your Tiffin Motorhome Has A Towed Air Brake Setup Or BrakeSync
    To determine if your motorhome has the Tiffin air brake setup or Freightliner BrakeSync you'll need to look at the rear and see if there's an quick disconnect fitting for your air line. The standard Tiffin air coupler fitting would look like a standard fitting, while the BrakeSync will have it's own proprietary coupler (pictured below). If you have the BrakeSync you'll want part # DM23MV, if you have the Tiffin air brake setup you'll want part # DM55MV. If you find you have no air coupler...
    view full answer...
    Image 1 for
  • Parts Needed to Flat Tow A 2022 Jeep Wrangler 4xe Behind a 2022 Newmar Kountry Star With Air Brakes
    First I recommend using the Roadmaster Direct-Connect Base Plate # RM-521453-5 on your 2022 Jeep Wrangler 4xe. This will pair with their Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar # RM-676. You will need to measure the height of the receiver on your 2022 Newmar Kountry Strar 3709 to determine if you will need a high-low adapter to keep the bars within 3" of level. The baseplate will have a height of 16-1/4" on stock tires. We have adapters like the 4" # RM-048-4 if your receiver...
    view full answer...
  • How to Use a Demco Air Force One Braking System on a 1999 Chevrolet Suburban with Hydro-Boost
    The Demco Air Force One Supplemental Braking System # DM23MV that you have comes with a kit specifically for vehicles with Hydro-Boost, like your 1999 Chevrolet Suburban. So you just need to install the system using that included kit. I have included a link to the instructions manual and a picture of the hydro-boost section of the manual here.
    view full answer...
    Image 1 for
  • Replacement Ait Jumper for Air Force One Brake System Installed on a Freightliner Chassis
    The Replacement Air Jumper # DM97ZR can be used as a replacement for the jumper that came in the Demco Air Force One Supplemental Braking System for Freightliner Chassis Motorhomes with BrakeSync # DM23MV that you previously purchased with us. The part # SM99666 you're looking at has a slightly different design so it isn't compatible.
    view full answer...
  • Recommended Flat Towing Set Up for a 2023 Jeep Wrangler w/ LOD Bumper
    Congrats on the new Jeep! It looks like the LOD signature bumper comes with the Blue Ox Off-Road Bumper Adapters item # BX88358 that fit the 1" D-rings so you will want to get a Blue Ox tow bar. I have linked a picture of the adapter below so you can confirm you have one. If not this is the one you will need to purchase, item # BX88358. For a compatible tow bar I recommend the Blue Ox Ascent Non-Binding Tow Bar item # BX4370. This tow bar features non-binding latches and a swivel function...
    view full answer...
    Image 1 for
  • Part Needed To Be Able To Use BrakeSync On A 2022 Fleetwood Discovery With A Towed Vehicle
    Since your 2022 Fleetwood Discovery came with BrakeSync, then the Demco Air Force One Supplemental Braking System for Freightliner Chassis Motorhomes with BrakeSync # DM23MV is the only component you need to flat tow. Your Freightliner chassis already has the components installed for the Air Force One.
    view full answer...
  • Recommended Flat Towing Components For A 2024 Ford F-150
    Hi Chris, To flat tow your 2024 Ford F-150 you'll need the following components: Baseplate: etrailer Invisible Base Plate Kit # e86YR Tow Bar: etrailer XHD Non-Binding Tow Bar # e94ZR. This tow bar comes with safety cables included and has a built in rise/drop to help keep it level between the motorhome and F-150. Tow Bar Wiring Kit: Roadmaster Smart Diode 7-Wire to 6-Wire Wiring Kit for Variable Voltage LED Tail Lights # RM38FR or incandescent # RM26FR. These diode kits will splice...
    view full answer...
  • Recommended Tow Bar Wiring for 2022 Gladiator with LED Lights
    For your 2022 Gladiator with LED Lights, I recommend the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit item # RM-15267. This is a confirmed fit for your 2022 model year whereas the Blue Ox Tow Bar Wiring Kit, # BLU79FR is not. For a complete list of items needed to flat tow your 2022 Jeep Gladiator, I recommend the following: - Base Plate Kit, Roadmaster Direct-Connect Base Plate Kit, # RM-521453-5 - Tow Bar, Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar w/ LED Lights,...
    view full answer...
  • Motorhome Side Of Air Force One Braking System For 2021 Fleetwood Discovery On Freightliner Chassis
    If your 2021 Fleetwood Discovery 38W on the Freightliner chassis came with BrakeSync then the Demco Air Force One Supplemental Braking System for Freightliner # DM23MV is the only components you need for the vehicle being flat towed. The chassis already has the components installed for the Air Force One. If you do not have the BrakeSync on your chassis the Demco SBS Coach Air Kit for Air Force One Supplemental Braking System # SM99627 is the RV side of the Demco Air Force One Supplemental...
    view full answer...
  • Will The Demco Air Force One For Freightliner Chassis Come With Detailed Installation Instructions
    Yes, the Demco Air Force One Supplemental Braking System for Freightliner Chassis Motorhomes with BrakeSync # DM23MV will come with a set of instructions, and will actually even come with an instructional CD included to help with the installation and usage. I've also attached a short video below where Ryan goes over the installation he did with a 2022 Ford Escape
    view full answer...
  • Wrong Size Fitting for a BrakeSync System and a Demco Air Force One
    Glad you got it all set up but that's interesting your Rambler's fitting is a different size. The Demco Air Force One item # DM23MV you purchased is specifically designed for the factory BrakeSync fittings. I don't know if yours got swapped out by a previous owner or what and I have no idea what size it is. The easiest way to correct this would be to swap the fitting out on your RV. I recommend taking the Air Hose item # DM97ZR to your local hardware store and matching the male fitting...
    view full answer...
  • What Demco Air Force One do I Need if my 2021 Thor Palazzo Has Air Fitting on Back?
    Hello Parker, Great question! Thank you so much for emailing me the picture of what is installed on the 2021 Thor Palazzo. We were able to identify that an Air Force One was previously installed in your coach, my contact at Demco confirmed that you will need the Demco Air Force # DM55MV. If you have any other questions about what other flat tow parts you need, I'm here to help! Once you get everything set up and hit the road, please let us know what you think about it. I like to encourage...
    view full answer...
  • Vehicle-Side Demco Air Force One Parts Needed For A 2018 Chevy Equinox
    Hey Joshua, If you're needing everything for the vehicle side of the Demco Air Force One kit then you'll want to pick up part # SM99209. For the lighting you'll need the Roadmaster Smart Diode 7-Wire to 6-Wire Wiring Kit for Variable Voltage Incandescent Tail Lights # RM26FR. The only other thing you'll need to pick up is a charge line kit # RM-156-25 to keep the battery charged while you tow since it will discharge otherwise.
    view full answer...
  • Coach Air Kit for 2023 Tiffin Phaeton Motorhome
    Hi Russell; is your 2023 Tiffin Phaeton on a Freightliner chassis with BrakeSync? If so, you should have the necessary components from the factory to work with the # DM23MV. If it is not, you need the Coach Air Kit for Demco Air Force One Flat Tow Brake System # SM99627.
    view full answer...
  • Which Demco Air Force 1 Kit for Freightliner Chassis that Is Prepped
    Hey Les, we have a version of the Demco Air Force One that was designed for Freightliner chassis that was prepped like what you have with the part # DM23MV. This comes with everything needed to install the braking components on both your motorhome and the F-150. You will also need a base plate kit like the Roadmaster Direct Connect part # RM38VR which is a confirmed fit for your truck. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and...
    view full answer...
  • Supplemental Braking for 2022 Phaeton 40QKH and Flat Tow items for 2022 Jeep Wrangler Unlimited
    If your 2022 Phaeton 40QKH has the BrakeSync, I recommend the Demco Air Force One Supplemental Braking System, # DM23MV for select Freightliner Chassis Motorhomes with BrakeSync. If your motorhome does not, I suggest Demco Air Force One Supplemental Braking System w/ Wireless Coachlink, # DM26VR. You will need the Roadmaster Direct-Connect Base Plate Kit, # RM-521453-5 to go with your Roadmaster Nighthawk All Terrain, Non-Binding Tow Bar, # RM-676. For a wiring solution, I recommend the...
    view full answer...
  • Replacement Check Valve Needed For The Demco Air Force One Supplemental Braking System
    Hi Wayne, The Replacement Check Valve for Demco SBS Supplemental Braking Systems # SM99909 is what you're looking for. You'll want to place the black end towards the main unit of your Air Force One # DM23MV. If you need anything other replacements just let me know and I'd be happy to help.
    view full answer...
  • Recommended Parts to Flat Tow a 2019 Ram 1500
    Congrats on the new motorhome! To flat tow your 2019 Ram 1500 4WD you will need the parts I have listed below. I have also linked any installation videos we may have so you can see how these products work and the process to get them set up. Tow Bar and Safety Chains - Roadmaster Sterling Tow Bar item # RM-576 and item # RM-674 Base Plate Kit - Roadmaster Direct-Connect Base Plate Kit - Removable Arms item # RM-522203-5 non Rebel Roadmaster Direct-Connect Base...
    view full answer...


< Previous
12



Do you have a question about this Flat Tow Brake System?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video Edited:
Joshua S
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee John S
Video Edited:
John S
Employee Wilson B
Updated by:
Wilson B
Employee Eric H
Updated by:
Eric H
Employee Amanda K
Updated by:
Amanda K
Employee Mike S
Written by:
Mike S
Employee Jacob H
Test Fit:
Jacob H
Employee Ryan G
Test Fit:
Ryan G
Employee Bradley B
Test Fit:
Bradley B
Employee John A
Test Fit:
John A
Employee Thomas T
Video by:
Thomas T
Employee Rick G
Video by:
Rick G

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


<