At PARTSMART, with our extensive bus and medium / heavy truck background to guide us, we know the importance of a properly operating air or hydraulic braking system. We understand that day in and day out, there can be no compromise in the integrity of a bus or commercial vehicle's brake system. That's why we offer you a high quality line-up of bus and truck brake system components; including valves, compressors, brake calipers, pads, brake chambers, camshafts and accessories. During regular brake system preventive maintenance lubrication or relining procedures it is recommended that camshafts be inspected for wear, roughness, or deformed splines and if camshaft bushings are worn. When camshafts are not excessively worn, these truck brake camshaft repair kits are designed to restore camshaft operation to its original equipment specifications.