Bri-Mar DT508LP, Owner'S Manual

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Inspection, Service and Maintenance
Bri-Mar 121
manual to see how to adjust your brakes. If you do not have this manual,
call Bri-Mar Manufacturing LLC at 1-717-263-6116 for a free copy.
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Jack up the trailer and secure it on adequate capacity jack stands.
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Be sure the wheel and brake drum rotate freely.
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Remove the adjusting-hole cover from the adjusting slot on the
bottom of the brake backing plate.
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With a screwdriver or standard adjusting tool, rotate the starwheel of
the adjuster assembly to expand the brake shoes. Adjust the brake
shoes out until the pressure of the linings against the drum makes the
wheel very difficult to turn. Note: Your trailer maybe equipped with
drop spindle axles. See axle manual for your axle type. You will
need a modified adjusting tool for adjusting the brakes in these axles.
With drop spindle axles, a modified adjusting tool with about an 80
degree angle should be used.
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Rotate the starwheel in the opposite direction until the wheel turns
freely with a slight drag.
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Replace the adjusting-hole cover.
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Repeat the above procedure on all brakes.
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Lower the trailer to the ground.
8.2.3.3 Trailer Brakes - Electric
Two different types of electric brakes may be present on the trailer: an
emergency electric breakaway system, which acts only if the trailer
comes loose from the hitch and the breakaway pin is pulled. The other
brake is an electric braking system that acts whenever the brakes of the
tow vehicle are applied.
Breakaway Brake
Breakaway Battery
– Dump trailers use the DC power unit battery to
supply the power to operate the trailer brakes if the trailer uncouples
from the tow vehicle. If the internal battery is allowed to drain below a
15% level, external charging is required using a commercial battery
charger Be sure to check, maintain and replace the battery according to
the battery manufacturer’ instructions. Check the fuses in the battery box
before each tow.
Trailers