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Replacement Master Cylinder w/ Inline Solenoid for Demco Actuators - Drum Brakes

Replacement Master Cylinder w/ Inline Solenoid for Demco Actuators - Drum Brakes

Item # DM5921
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Replacement Master Cylinder w/ Inline Solenoid for Demco Actuators - Drum Brakes Drum Brakes DM5921
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Master cylinder with inline solenoid installs in your Demco actuator and wires into your tow vehicle so that your trailer brakes won't activate when you shift your vehicle into reverse. For use with Demco hydraulic surge-type drum brake actuator. Call 800-298-1624 to order Demco accessories and parts part number DM5921 or order online at etrailer.com. Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Replacement Master Cylinder w/ Inline Solenoid for Demco Actuators - Drum Brakes. Accessories and Parts reviews from real customers.
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Demco Accessories and Parts - DM5921

  • Brake Actuator
  • Master Cylinder Parts
  • Master Cylinder
  • Demco
  • Drum Brakes

Master cylinder with inline solenoid installs in your Demco actuator and wires into your tow vehicle so that your trailer brakes won't activate when you shift your vehicle into reverse. For use with Demco hydraulic surge-type drum brake actuator.


Features:

  • Replacement master cylinder is designed for use with Demco trailer brake actuators with electric reverse lockouts
    • Works with DA66B, DA86, DA91, DA10, DA16, and DA20 models designed for drum brakes
  • Electric reverse lockout lets you back up without actuating trailer brakes
    • Solenoid activates automatically when you shift into reverse
  • Inline solenoid configuration
  • Made in the USA


5921 Replacement Master Cylinder with Inline Solenoid for Demco Actuators - Drum Brakes




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Video of Replacement Master Cylinder w/ Inline Solenoid for Demco Actuators - Drum Brakes

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Demco Brake Actuator - DM5921

Today we're going to take a look at the replacement master cylinder with the inline solo Knight for Demco drum brake actuators. Now this is a replacement master cylinder. It's designed for use with the Demco trailer brake actuators with electric reverse lockouts. It is designed to work with the DA66B, the DA86, the DA91, the DA10, the DA16 and the DA20 models designed for drum brakes. You can see it has a nice composite master cylinder. It's very durable and efficient, has glass reinforced nylon construction to help resist rust and corrosion, and it's a very large reservoir provides increased capacity for your brake fluid.

Other nice features, if you look at the top here, has a standard automotive style diaphragm cap that'll help create completely enclosed system to help prevent contamination of your brake fluid. Now this master cylinder uses the electric first reverse lockout right here on the back, lets you back up without actuating your trailer brakes. Basically this master cylinder with this inline solenoid installs in your drum brake actuator and it wires to your tow vehicle so that the trailer brakes won't activate when you shift your vehicle into reverse. Has a ground wire and a power wire and see they're both yellow, so either one can be used for either function. The power wires connected to the reverse circuit`at happens is when the vehicles placed in reverse, electrical signal powers the solenoid which will prevent brake fluid from getting to the brakes.

Now this one is a non bypass configuration, which means when it's energized it'll just prevent the fluid from flowing anywhere. Also, one thing I do want to mention is the reason this master cylinders for only drum brakes is that it uses a residual valve in the cylinder that maintains approximately 10 pounds to 15 pounds of hydraulic pressure on your hydraulic circuit from the master cylinder out to your drum brakes wheel cylinders. And this reduces the time of brake activation by overcoming the pressure created by the drum brake return spring. So you do not want to use this cylinder for disc brakes because you do not need that residual valve in these brakes because that extra pressure created will partially activate your disc brakes during highway travel causing brake overheating and failure. Now if you do need the cylinder for disc brakes with the solenoid, we do sell that separately on our website.

It's part number DM5919. But that should do it for the review on the replacement master cylinder with the inline solenoid for the Demco drum brake actuators.

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Ask the Experts about this Demco Accessories and Parts

  • Which is Better Master Cylinder Lockout Design for Demco Surge Actuator # DM5920 or # DM5921
    The part # DM5921 is a replacement master cylinder with electric lockout that fits your Demco DA20 coupler which has a lockout design that basically stops the hydraulic pressure from getting to the brake assemblies whereas the # DM5921 has a bypass design that directs the fluid/pressure back into the master cylinder when locked out. The bypass style is easier on the master cylinder since the pressure has somewhere to go so if you wanted the best design this is the way to go.
    view full answer...
  • Replacement Parts Available For a Demco DA10 Surge Brake Actuator
    We do have a large selection on replacement parts for a Demco DA10 surge brake actuator. Replacement Shock # DS12426 Slide Repair Kit # DM5943 Replacement Drum Brake Master Cylinder w/ Bypass Solenoid # DM5920 Replacement Disc Brake Master Cylinder w/ Bypass Electric Lockout # DM5918 Replacement Drum Brake Master Cylinder w/ Inline Solenoid # DM5921 Replacement Disc Brake Master Cylinder w/ Inline Solenoid # DM5919 Reverse Lockout Solenoid # DM11993 Replacement Solenoid Cover...
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Matthew E
Updated by:
Matthew E
Employee Kristina F
Written by:
Kristina F

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