Get your semi ready with Expertise Built In with reliable air brake performance, with the OTR 16.5" Full Camshaft Repair Kit for Meritor Q. To slow a vehicle or bring it to a stop, this repair kit tightens the internal components of a brake drum, allowing the camshaft to spread the brake shoes apart to create friction and slow a vehicle. Fashioned with precisely-engineered accessories to provide long-term dependability and wear resistance. FleetPride is your First Click in Heavy Duty .