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Can Demco Disc Brake Actuator w/ Lockout & 20,000 lb Capacity Work w/ Drum Brakes


I would like to use the Demco Hydraulic Brake Actuator Item # DM8204311 - for disc brakes for a trailer with drum brakes. The drum brake version of this actuator does not have a reverse lockout. Can this actuator be used for a drum brake application? If not, could you let me know why? Thank you.


Expert Reply:

Disc brake actuators like the Demco Hydraulic Brake Actuator w/ Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball - 20K # DM8204311 cannot be used with drum brakes because disc brake actuators use much higher pressure, so they could blow out the wheel cylinders, among other issues. That said, you can add a lockout to the drum brake version of this actuator:

- Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2-5/16" Ball - 20,000 lbs # DM8204011

- Reverse Lockout Solenoid for Demco Hydraulic Brake Actuators - Non-Bypass # DM11993

I have added a link below showing how this solenoid installs for you to check out.

expert reply by:
Kyle S

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