Demco Brake Master Cylinder with Reverse Bypass Solenoid Replacement for Demco Actuators

This is an OEM replacement Master Cylinder (with Reverse Bypass Solenoid Pre-Installed) for Demco Brand Actuators. This Hydraulic Trailer Brake Master Cylinder is a direct replacement for the ones found in Demco Actuator Models DA66b, DA86, DA91, DA10, DA16, and DA20.
This is the Composite Construction Version of this Demco Master Cylinder, which has a 1″ diameter Bore that is best suited for Single or Tandem Axle Axle Trailers up to 8,600lb capacity. If you have a Triple Axle Trailer or an extra Heavy Tandem Axle Trailer that uses a Demco Actuator, it is best to use the Aluminum Construction Version of this Master Cylinder, found here. The Aluminum Version Features a Larger Bore Diameter (1 1/4″) which means more brake fluid goes to your trailer brakes faster.
This Demco Aluminum Master Cylinder installs quickly and easily to your Trailer Brake Actuator through the 4 mounting holes on top and the included mounting hardware.
Features: – Composite Construction (1″ Diameter Bore)
– Disc Brake Master Cylinder
– Pre-installed Lockout Solenoid
– Easy 4 bolt installation, hardware included
– fits DA66b, DA86, DA91, DA10, DA16, and DA20