VI BRAKES MID WHEELS 9 Z9 Ftum sour sen Piston INLET Moummc em I sou Linea A CA Q snzeve II III I I suevonr l V l 1 snAc z r Tilt I I I E 2 AI I 5 E I I 1 an A II III I I s II 1 1 4 I y I IZ Roms 1 r V wnnmus l A sensos supponr moummc SPRING EAR E oureomn suc mus Fly 9 22 Callw and Ilalur Slnmu Plstnm I I lining assemblies are in need of replacement fig msrou g 25 SEAL An inspection port is provided at the top center of the caliper casting for visual inspection of lining con dition fig 9 26 Upantlnn The significant feature of the single piston caliper operation is that it is free to slide laterally on the two mounting bolts threaded into the support bracket METAL PISTON Figure 9 27 shows a simplified cross section of the DUST floating caliper and the forces at work when the RETAINER BOOT NM26 brakes are applied During brake application fluid nl 943 mm SEM Mwlw MIM nd mm pressure behind the piston increases This pressure is exerted equally against the bottom surface of the piston and against the bottom surface of the piston Id Inboard shoe has mounting ears on top bore which fit over retaining bolts Pressure applied to the piston is transmitted to the e nboard shoe has a notch at the top for the inboard shoe and lining forcing the lining against the supporting spring inboard rotor surface Pressure applied to the bottom A wear warning sensor a strip of flanged metal is of the piston bore forces the caliper to slide on the attached to the back of all disc brakeshoes When mounting bolts toward the inboard side This inward brake lining wears to the point of replacement the movement of the caliper causes the outboard section sensor contacts the rotor surface making a screeching of the caliper to force the outboard shoe and lining as or scraping noise to warn the driver that the shoe and sembly against the rotor surfaces