| Medium Duty Furthermore, rotors should be inspected and checked with a micrometer to ensure they are in spec, they add. When necessary, rotors should be replaced. Also, fl eets should always inspect the condition of brake hoses and other components to determine whether or not they should be replaced. “Burned, glazed or oil-contaminated brake pads must be replaced immediately,” say offi cials at WABCO, a global supplier of technologies and services that improve the safety, effi ciency and connectivity of commercial vehicles (www. wabco-auto.com). “Always replace all brake pads by axle, using a new retaining system for brake pads and pressure plates. To avoid damaging the brake disc, replace the brake pads no later than at the point when they reach the wear limit at their weakest spot. Th e residual pad thickness must not be allowed to become less than 2mm above the backing.” WABCO offi cials also advise doing the following when conducting an inspection with the wheel removed from the vehicle: Bringing a medium duty commercial vehicle to a complete stop requires functioning brakes that are up to the task. Photo from iStock • Check boots, seals and end caps for damage or cracks. • Measure pad wear. • Inspect the rotors for cracks. • Check running clearances and adjuster operation. • Check caliper side movement. It should move easily by hand. • Check caliper guiding clearances. • Inspect all caps, hoses and the entirety of the brake’s exterior for damage. When it comes to disc brakes, says Bendix’s Oreskovic, fl eets need to ensure pad and rotor thicknesses are checked regularly. Furthermore, the vast majority of disc brakes employ a fl oating caliper. “Th at means the caliper moves on pins as brakes are applied, and it needs TRACTION IN FORWARD AND REVERSE FOR 1/2 TON TO CLASS 8 VEHICLES šKJ?B?JOJHK9AI š<?H;JHK9AI š7C8KB7D9;I šI9>EEB8KI;I šFBEMJHK9AI šJH79JEHJH7?B;HI 800-766-7768 www.onspot.com VehicleServicePros.com/10123676 VehicleServicePros.com/10119534 26 FLEET MAINTENANCE ❚ NOVEMBER/DECEMBER 2016 ❚ VehicleServicePros.com
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