How do you adjust a slack adjuster on an international?
With the brakes released and either the wheels chocked or the
trailer brakes set, you rotate the nut on the slack adjuster until
the brake shoes are tight against the drum. Then you back it off
1/4 to 1/2 turn. What tools you need specifically depend on which
slack adjuster you have... you could have Bendix, Haldex,, or Wabco
Meritor slack adjusters.