TSE DPT60, Owner'S Manual

Page: 378 / 459

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Electric Brakes
The electric brakes on your trailer are similar to the drum brakes
on your automobile. The basic difference is that your automotive
brakes are actuated by hydraulic pressure while your electric
trailer brakes are actuated by an electromagnet. With all of the
brake components connected into the system, the brake will
operate as follows:
When the electrical current is fed into the system by the
controller, it flows through the electromagnets in the brakes. The
high capacity electromagnets are energized and are attracted to
the rotating armature surface of the drums which moves the
actuating levers in the direction that the drums are turning.
The resulting force causes the actuating cam block at the shoe
end of the lever to push the primary shoe out against the inside
surface of the brake drum. The force generated by the primary
shoe acting through the adjuster moves the secondary shoe out
into contact with the brake drum.
Increasing the current flow to the electromagnet causes the
magnet to grip the armature surface of the brake drum more
firmly. This results in increasing the pressure against the shoes
and brake drums until the desired stop is accomplished.
Braking Systems - Electric
Primary Shoe
Actuating Lever
Magnet
Adjuster Spring
Adjuster
Shoe Hold
Down Spring
Secondary Shoe
Retractor Spring
Front of Brake