Specifications

Page 2
Table of Contents
General information ............................................................................................................. 2
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 ..................................................................................................... 7
Bolt Torque .......................................................................................................................... 8
Coupler Repair Kit Options ................................................................................................. 8
Bolt/Weight Rating Warning ................................................................................................ 9
Weld On Instructions ........................................................................................................... 9
Free Backing Solenoid Kits ................................................................................................. 9
Actuator Breakdown and Parts List .................................................................................... 10
Optional Outer Case & Hitch Configurations ...................................................................... 11
eZ-Latch Coupler Operations ............................................................................................. 12
Actuator Installation and Maintenance .............................................................................13-14
Rue Ring Installation .......................................................................................................... 15
• 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 DA20 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 tow-
ing 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.
DEMCO MODEL DA20 ACTUATOR
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.