Tie Down Drum Brakes - Manual (Page 6)

Use only DOT 3 heavy duty fluid in the actuator. Do not re-use brake fluid. Do not
use any other type of brake fluid other than DOT 3.
If pressure bleeding equipment is available, follow the manufacturer’s instructions
in bleeding the system. These types of brake bleeders are available at your local
automotive supply store.
Manually Bleeding, Pumping the Actuator: Insert a heavy-duty flat blade screwdriver
into the hole provided on top of the actuator near the front. Catch the bleeding latch
bracket with a screwdriver and, with a pumping action, tilt the screwdriver front to
back in a rocking motion to activate the master cylinder in order to bleed the brakes.
To bleed master cylinder and brakes, install bleeder hose on first wheel cylinder to
be bled; if tandem axle trailer, bleed furthermost axle first, and the furthermost brake
on that axle first. Loosen the bleeder screw located in the wheel cylinder one turn, the
system is now open to the atmosphere. Attach a loose end of a hose from the bleeder
valve with the other end submerged in a glass container of brake fluid. While pumping
the actuator watch and observe the bubbling (hose must be submerged into clean brake
fluid to keep air from traveling back into the brake cylinder).
The bleeding operation for that brake is complete when bubbling stops. Be sure to
tighten bleeder screw securely.
Each wheel cylinder must be bleed until all air is out of the lines. Replenish the
brake fluid during the bleeding process so the level does not fall below half full level in
the master cylinder reservoir. When bleeding and testing is completed, make sure
master cylinder is filled to 3/8” below the top of the reservoir and filler cap is securely
in place.
WARNING
Brakes should always be rinsed with fresh water after using trailer in corrosive
conditions. This includes salt water, fertilizers and other corrosive materials.
Before storing trailer remove brakes and clean thoroughly. It is also wise to
repack the bearings at the same time.
WARNING
DO NOT REUSE BRAKE FLUID. Always use fresh DOT 3 fluid from a fresh
container. Failure to maintain proper levels of fluid will cause brake failure.
Bleeding the Brake System - Hydraulic Drum Brakes Only
Page 5