Table of Contents
Advertisement
Introduction ...............................................................2
Installation Instructions ...............................................2
Electrical Wire Colors and Function ...............................3
Electrical Installation Requirements .............................4
Electrical Schematic ...........................................................4
Test Electrical Operation ..............................................5
Bleeding and Brake Adjustment ....................................5
Sleep Mode .................................................................6
Electric Controller Unit Testing/Adjusting .....................6
Troubleshooting Guide .................................................7
Aftermarket Kits .................................................................7
Please visit www.dexteraxle.com
for current warranty information.
CAUTION
!
This is the safety alert symbol. It is used to alert you to potential
injury hazards. Obey all safety messages that follow this symbol to
avoid possible injury or death.
Scan to view DX Series
Actuator Installation Video
Introduction
CAUTION
Dexter DX Series systems should only be installed by a qualified
technician.
This manual has been provided to guide you through the process of
installing, operating, and maintaining your Dexter DX Series electrically
controlled hydraulic brake actuation device (also referred to as DX Series
brake actuator). This electrically powered unit has been designed and
manufactured to give safe, reliable power to your hydraulic trailer brakes.
CAUTION
Please review and understand all installation manual instructions
before beginning installation. Many steps are sequential so it is
necessary to complete all elements as instructed.
2021.02 | 2
Before proceeding, make sure that the unit is appropriate for your
particular brakes. The E/H 1000 produces 1000 psi, typically used
for duo-servo hydraulic drum brakes, while the E/H 1600 produces
1600 psi for most hydraulic disc brakes. Please refer to your brake
manufacturer for proper operating pressures.
The Dexter DX Series brake actuator is compatible with many electric
brake controllers, but the best performance will be achieved using an
inertial type controller such as the Dexter Predator DX2®. The electronic
timer type of controller is not recommended because these units use a
fixed control that does not sense varying brake requirements.
Please reference 059-A38-00 DX Series Compatibility Guide,
available at www.dexteraxle.com for more information on brake
controller compatibility.
CAUTION
It is the responsibility of the end user to ensure that their electric
brake controller is compatible with the Dexter DX Series brake
actuator. Dexter attempts to provide compatibility with most
controllers available, but is unable to anticipate design changes
that might be introduced by the various controller manufacturers.
Installation Instructions
The following materials are required to properly install the Dexter DX
Series brake actuator. If your trailer is not already equipped with brake
lines, you will need enough 3/16" diameter automotive brake line to
connect the trailer brakes to the unit. Where possible, steel tubing is
preferred.
ƒ Four 1/4" threaded fasteners to mount the unit to the trailer.
ƒ One quart of DOT 3, DOT 4, or DOT 5 brake fluid (from a new
sealed container).
ƒ One emergency breakaway kit - must include a 12 volt, 9 amp
hour (minimum) battery.
ƒ Wire (see Electrical Schematic, page 4.)
Location of the Dexter DX Series brake actuator is at the discretion
of the trailer manufacturer or owner. When selecting the location, the
following items should be considered:
1. The shorter the wiring between the unit and the electrical power
source, the smaller the voltage drop.
2. The unit should be located so that the electrical wiring and
brake lines can be neatly routed directly to the towing vehicle
and trailer brakes. Special care should be taken to minimize
the number of bends and fittings in the brake line circuits.
3. An emergency breakaway kit must be located on the trailer so
that the trailer breakaway cable can be easily attached to the
towing vehicle.
4. The Dexter DX Series brake actuator is powered from the
electrical system on the tow vehicle. In order for the unit to
function properly, it must have adequate electrical power (see
Electrical Schematic, page 4.)
5. The Dexter DX Series brake actuator should not be placed in an
area where it is susceptible to damage from trailer loads, road
DX SERIES SERVICE MANUAL
ELECTRIC/HYDRAULIC ACTUATORS
Advertisement
Table of Contents
