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FRICTION MATERIAL NOTE: Original Equipment Manufacturer (OEM) specifications designate replacement at different thicknesses. CAUTION: It is required that friction material be matched in axle sets for consistent braking characteristics. FRICTION MATERIAL INSPECTION Condition Code Procedure Contaminated, for example, fluid that leaked from caliper, wheel cylinder, or axle seal ........... A ........ (1) Require replacement. Cracked through ......... B Require replacement. Flaking or chunking ..... B Require replacement. Glazed (shiny) .......... .. ........ No service suggested or required. Grooves or ridges ....... .. .... (2) No service suggested or required. Permanently attached hardware bent .......... A ............ Require replacement. Permanently attached hardware broken ........ A ............ Require replacement. Permanently attached hardware loose ......... A ............ Require replacement. Permanently attached hardware missing ....... C ............ Require replacement. Permanently attached hardware seized ........ A .. Require repair or replacement. Rivets loose ............ B ............ Require replacement. Separating from backing . B ............ Require replacement. Shoe table or web bent .. B ............ Require replacement. Shoe table or web cracked ................ A ............ Require replacement. Shoe table or web worn, affecting performance .. A ............ Require replacement. Surface cracking ........ .. ........ No service suggested or required. Further inspection may be necessary to determine cause. Tapered wear ............ B ........ (3) Suggest replacement. Thickness of one pad is greater than opposite pad in the same caliper (uneven wear) .......... .. .... (4) Replacement of friction material not suggested or required. Further inspection required. See CALIPERS and CALIPER HARDWARE. Wear indicator device (electronic) contacts rotor .................. B ...... (5) Require replacement of appropriate parts. Wear indicator device (mechanical) bent ....... .. .......... ( 6) Further inspection required. Wear indicator device (mechanical) broken .... .. ......... ( 6) Further inspection required. |