Airstream 2001 Bamby Owner's Manual page 44

AIRSTREAM SAFARI –BAMBI TRAILER OWNERS MANUAL 2001
HOW ELECTRIC
BRAKES WORK
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
actuated by an electromagnet.
With all of the
components connected into the
system, the brakes will operate
as follows: (See Figure A).
When electrical current is fed
into the system by the controller,
it flows through the electro-
magnets in the brakes. The high
capacity electromagnets
energized and are attracted to the
rotating armature surface of the
drums, which moves
actuating levers in the direction
that the drums are turning. The
resulting force causes
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 link then 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.
are
brake
are
the
the
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