-11-
Self Adjusting Feature
(12
1
/
4
" brakes series only)
Forward self adjust electric brakes were introduced in October of
1996. This feature adjusts the brakes on both forward and reverse
stops. Brake adjustment occurs when lining wear results in
enough gap between the shoes and the brake drum surface. This
added clearance will allow the adjuster mechanism to rotate the
screw assembly at the bottom of the brake. That action expands
the distance between the shoes and thus closes the gap to the
drum surface.
Brake Controllers
Electric brake controllers provide power to the magnets to actuate
the trailer brakes. Dexter Axle offers a state-of-the-art inertial
controller called the Predator Series™ DX2. This controller
features a patented pendulum design which senses the
deceleration of the towing vehicle and sends a proportional
voltage to the electric trailer brakes. Other features include a
visual gain setting for quick and easy adjustment and a digital
LED display to show the voltage output. A manual override sends
full voltage to the trailer brakes, regardless of gain setting, for
emergency conditions and also illuminates the brake lights to
warn of an impending stop.
Most electric brake controllers provide a modulation function that
varies the current to the electric brakes with the pressure on the
brake pedal or amount of deceleration of the tow vehicle.
Electronic or timing controllers do not provide proportional
modulation. These controllers tend to be inexpensive but not the
best choice for optimum braking. It is important that your brake
controller provide approximately 2 volts to the braking system
when the brake pedal is first depressed and gradually increases
the voltage to 12 volts as brake pedal pressure is increased. If the
controller "jumps" immediately to a high voltage output, even
during a gradual stop, then the electric brakes will always be fully
energized and will result in harsh brakes and potential wheel
lockup.
B
rak
ing S
ys
tem
s - El
ec
tri
c
Summary of Contents for PTV100/72
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Page 54: ...Contents iv 032015 PN 4 ...
Page 175: ...Troubleshooting 70 35 032015 PN 133 ...
Page 187: ...Troubleshooting 70 47 032015 PN 145 ...
Page 205: ...Warranty DX EMISSIONS EPA 19 12DEC12 2 2 TS1721 UN 15JUL13 90 6 032015 PN 163 ...
Page 213: ...Warranty DX EMISSIONS CARB 19 01AUG14 8 8 RG26036 UN 24JUN14 90 14 032015 PN 171 ...
Page 214: ...Warranty 90 15 032015 PN 172 ...
Page 220: ...Engine Registration IBC 2 032015 PN 178 ...
Page 223: ...Engine Registration IBC 5 032015 PN 181 ...
Page 224: ...Engine Registration IBC 6 032015 PN 182 ...
Page 225: ...SERVICE MANUAL ...
Page 262: ...saue Axial Piston Pumps and Motors Service Manual Series 90 CONTENTS ...
Page 348: ...saue 87 Series 90 Exploded View Parts Drawings 10 Notes CONTENTS ...
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