US 5,345,664 A · Method for changing brake springs and shoes

Abstract

A method for installing and removing brake springs and brake shoes in a vehicle involves the following steps: removing a wheel from the vehicle and removing a brake hub from the vehicle (If the brake assembly is situated on an apparatus other than a vehicle, the step of removing the wheel is not included.), placing an end of an elongated lever having a bifurcated gripping member on a lip of a lower brake shoe, rotating the elongated lever clockwise causing the lower brake shoe to rotate outwardly from a contracted position to an extended position, removing a lower cam roller, placing the end of the elongated lever having the bifurcated gripping member on a lip of an upper brake shoe, rotating the elongated lever counterclockwise causing the upper brake shoe to rotate outwardly from a contracted position to an extended position, removing an upper cam roller, placing another end of the elongated lever having a bifurcated grasping member around a brake spring shaft of a brake spring, placing an upper edge of a brake cam into a cam lifting and restraining notch on the elongated lever, using a point of contact of the upper edge of the brake cam and the cam lifting and restraining notch as a fulcrum and rotating the elongated lever clockwise, removing a brake spring restraining hook on the brake spring from a brake spring restraining member and removing the lower brake shoe and the upper brake shoe are the remaining steps. Assembly is accomplished by reversing the above steps.

A method for changing brake springs and shoes comprising:

(a) removing a brake hub;
(b) grasping an installation tool for installing and removing brake springs and brake shoes, said installation tool comprising:
an elongated lever member having a longitudinal length, a substantially constant width transverse to said longitudinal length, and an upper surface;
a first terminal end of said elongated lever member comprising a bifurcated gripping member that includes a single lower tine and a single upper tine;
said single slot having a distal end coinciding with said first terminal end;
each of said lower tine and said upper tine terminating at the distal end of said single slot;
and
a second terminal end of said elongated lever member comprising a bifurcated grasping member;
and placing the first terminal end of said installation tool on a lip of a lower brake shoe;
(c) rotating the installation tool clockwise causing the lower brake shoe to rotate outwardly from a contracted position to an extended position;
(d) removing a lower cam roller;
(e) placing the first terminal end of the installation tool having the bifurcated gripping member on a lip of an upper brake shoe;
(f) rotating the installation tool counterclockwise causing the upper brake shoe to rotate outwardly from a contracted position to an extended position;
(g) removing an upper cam roller;
(h) placing the second end of the installation tool having a bifurcated grasping member around a brake spring shaft of a brake spring;
(i) placing an upper edge of a brake cam into a cam lifting and restraining notch on the elongated lever;
(j) using a point of contact of the upper edge of the brake cam and the cam lifting and restraining notch as a fulcrum and rotating the installation tool clockwise;
(k) removing a first, then a second, brake spring restraining hook on the brake spring from a first, then a second, brake spring restraining member, respectively;
(l) removing the lower brake shoe and the upper brake shoe;
(m) installing the lower brake shoe and the upper brake shoe;
(n) installing a first brake spring restraining hook on the brake spring to a first brake spring restraining member;
(o) placing the second end of the installation tool having a bifurcated grasping member around the brake spring shaft of the brake spring;
(p) using a point of contact of the upper edge of the brake cam and the cam lifting and restraining notch as a fulcrum and rotating the installation tool clockwise;
(q) installing a second brake spring restraining hook on the brake spring to a second brake spring restraining member;
(r) placing the first terminal end of said installation tool on a lip of a lower brake shoe;
(s) rotating the installation tool clockwise causing the lower brake shoe to rotate outwardly from a contracted position to an extended position;
(t) installing a lower cam roller;
(u) placing the first terminal end of the installation tool having the bifurcated gripping member on a lip of an upper brake shoe;
(v) rotating the installation tool counterclockwise causing the upper brake shoe to rotate outwardly from a contracted position to an extended position;
and
(w) installing an upper cam roller.

28 more elements

Method for changing brake springs and shoes

Life of this patent

Method for changing brake springs and shoes

Life of this patent

Abstract

Claims1