Check the listing for details. Demco 8759131 DA91 Hydraulic Brake Actuator. Condition: New. Listed at 228.89 USD. Universal DA91 Hydraulic Brake Actuator (8759131) by Demco®. Finish: Zinc. With 8" 4 Bolt Adjustable Down Channel and 3 Hole Standard Outercase. For Drum Brakes. Capacity: 8000 lb With industry leading features Demco Actuators are built heavy duty in the USA for the safest braking and extended trouble-free life. DA20 available in either weld-on or bolt-on mounts. Drum brake actuator for marine and light utility applications. 2" x 4-1/2" grade 5 bolts are required in mounting of straight actuators. 800 lb maximum tongue load or 10% of G.V.W.R. of coupler, vehicle, ball or trailer. 50? A-frame mounted actuator may be welded on. Plated actuator may be used in a marine application. DA91 and DA9150 actuators utilize Acetal Copolymer linings. Rollers are eliminated. G.V.W.R. Limited to coupler rating.