An adjuster arrangement for maintaining first and second brake shoes of a
brake between a minimum and a maximum clearance with respect to a drum.
The adjuster arrangement has a pawl located on a pivot pin on the first
brake shoe and an arm that engages a star wheel of an expandable strut. A
first leg of a thermo clip is held against the first brake shoe by the
pivot pin and receives thermal energy generated during a brake
application. During a brake application, the pawl pivots on the pin and
imparts a rotary torque to the star wheel to expand the strut to create a
maximum clearance while at the same time a predetermined temperature
generated during a brake application acts on the thermo clip to moves the
pawl out of engagement with the star wheel to prevent rotating the star
wheel and thereby sustain a minimum clearance.