Portable slack adjuster lock

For use with a manual slack adjuster comprised of a lever portion, a housing, an internal worm gear disposed within said housing and a hexagonal shaped adjusting nut connected to said worm gear and projecting from said housing, a method of locking said adjusting nut by means of a portable slack adjuster lock comprised of a generally C-shaped clamp having a back portion, a pair of opposite end portions extending at right angles from said back portion, opposite faced hook portions connected to said end portions, and a hexagonal shaped aperture in at least one of said end portions, shaped to receive said adjusting nut, said method comprising the steps of:

• (a) bending apart said hook portions of said C-shaped clamp,
• (b) passing said hook and end portions of said clamp over said slack adjuster,
• (c) aligning said aperture with said adjusting nut, and
• (d) releasing said clamp such that said hook and end portions contact said housing with said nut projecting through said aperture, thereby clamping said lock around said housing and locking said nut within said aperture.

In a manual slack adjuster for vehicle braking systems, comprised of a lever portion, a housing, an internal worm gear disposed within said housing, and a hexagonal shaped adjusting nut connected to said worm gear and projecting outwardly from said housing;

• a lock for maintaining said adjusting nut in a predetermined position, comprised of a C-shaped clamp for clipping onto said housing, including a rear portion;
• top and bottom end portions;
• a pair of oppositely disposed hook portions;
• and a hexagonal shaped aperture in at least one of said end portions, adapted to receive and secure said adjusting nut in response to said clamp being clipped onto said housing, whereby said nut and consequently said worm gear are locked in a fixed position.