Specifications

Page 2
DEMCO MODEL DA10 ACTUATOR
• Review following instructions before installation and use of hydraulic brake
actuator.
• Dealers or distributors must review these instructions with ultimate user.
• Failure to follow these instructions, or failure to properly maintain braking
system after installation, can result in loss of braking action.
WARNING: To Prevent Serious Injury or Death
Model DA10 is a heavy duty surge brake actuator for trailers with two or four wheels.
When brakes are applied on the towing vehicle, forward inertia of trailer toward
towing vehicle applies brakes on trailer in direct relation to manner brakes are applied
on towing vehicle. Brake towing vehicle hard and brakes on trailer are applied hard.
Master cylinder push rod spring assembly protects system from hydraulic pressure
overload.
Table of Contents
General information & Warranty Policy & Registration ........................................................ 2
Safety, Signal Words and Equipment Safety Guidelines ..................................................... 3
Safety Sign Locations & Safety Sign Care .......................................................................... 4
Before Operation ................................................................................................................. 5
During Operation ................................................................................................................. 5
Following Operation ............................................................................................................ 6
Highway and Transport Operations ..................................................................................... 6
Performing Maintenance ....................................................................................................6-7
Bolt Torque .......................................................................................................................... 7
Bolt/Weight Rating Warning ................................................................................................ 8
Welding & Actuator Kits ...................................................................................................... 8
Free Backing Solenoid Kits & Coupler Kits ......................................................................... 9
Actuator Breakdown and Parts List .................................................................................... 10
Outer Case Options & Hitch Configurations ....................................................................... 11
eZ-Latch Coupler Operation ............................................................................................... 12
Actuator Installation and Maintenance .............................................................................13-14
Rue Ring Installation .......................................................................................................... 15
All Demco actuators and brake assemblies are
compatible with DOT 3 or 4 brake fluid.
WARRANTY POLICY & REGISTRATION
Go online to www.demco-products.com to review Demco warranty policies and register your Demco product.