Schmidt AmphiBlast 120, Operation And Maintenance Manual

Page: 103 / 116

103
Copyright © 2019 Axxiom Manufacturing, Inc.
11.4.7. Swaying of Trailer When Braking
(1) Incorrect brake adjustment.
(2) Incorrect tire air pressure.
(3) Different tire sizes on axle.
(4) Shoe or lining not properly operating.
(5) Brake lines damaged
11.4.8. Brake Adjustment Procedure
(1) Jack up trailer and support with jack stands.
(2) The brake adjustment nut is located behind a slot at the bottom of the backing plate.
Tighten until the wheel cannot be rotated by hand. Note: always rotate wheel in
direction of forward rotation only.
(3) Back off the adjustment nut seven to ten notches.
(4) Remove jack stands from trailer support.
11.4.9. Brake System Bleeding Procedure
(1)
Only use new hydraulic brake fluid. DOT-3 heavy duty fluid is recommended.
(2)
Fill the master cylinder with fluid. Install bleeder hose on first wheel cylinder to be
bled. If tandem trailer, bleed rear axle first. Have loose end of the hose submerged in
brake fluid in glass container to observe bubbling.
(3)
Loosen the wheel cylinder bleeder screw one turn. This will open the system to the
atmosphere due to the passage drilled through the bleeder screw. Push the actuator with
long steady strokes. The bleeding operation is complete when bubbles no longer rise to
the surface of the fluid. Be sure to close the bleeder screw securely.
(4)
Repeat bleeding operation at each wheel cylinder. During the bleeding process, refill the
brake fluid so the level does not fall below the full level in the master cylinder reservoir.
(5)
After bleeding is completed, make sure master cylinder is filled to 3/8” below the top of
the reservoir and filler cap is installed.
Notes