Wheels and Tires Inspection

Component	Inspect visually for	Corrective Action
Wheel and side ring, mounted	Foreign matter	Remove any material caught between dual wheels, tire and wheel, or in tire treads
	Cracks and other damage, especially on or near mounting surfaces and bolt holes	Replace
	Trueness; use dial indicator	Replace if eccentric or out of round.
	Lubricant leakage on wheel, tire or brake drum	Correct leakage
Wheel and side ring, dismounted: (tire-mounting surfaces, especially tire-bead mating areas)	Dents, cracks, tool damage, imbedded foreign matter, and corrosion	Remove minor damage and clean parts. Replace unserviceable parts.
	Bare metal	Clean and refinish
Cone Locknuts	Looseness, when installed; also check by torque wrench	Tighten loose locknuts
	Any damage that affects correct seating or that weakens part	Replace
Hub and drum	Damage, especially if it could prevent correct wheel mounting	Replace unserviceable part. If brakes are at fault, adjust, replace, or repair as necessary.
	Drum contamination, cracks, thin or scorched spots, heat checking (network of fine cracks), scoring (grooves around braking surfaces), glazing (usually from lubricant contamination), and braking surface that is tapered or too thin.	Clean as necessary. If damage or wear not excessive, cam-grind drum. Replace excessively thin, rough, scorched, or tapered drum. (Heat checking of drum interior occurs during normal heating and cooling from brake operation. Unless cracks are wide and/or deep, the drum is considered serviceable if otherwise sound.)
Tire, Mounted	Damage, foreign objects, age-checking, scuff or wear that exposes cord, worn thread, cracks, and ruptures	Replace unserviceable tire. Remove foreign objects from serviceable tire and, if cord is exposed in small area(s), have tire repaired.
	Air leaks through tube or tube valve stem; apply non-corrosive soap solution to locate leaks	Replace defective valve core, then replace cap. Repair tube leak or replace unserviceable tube.
Tire, dismounted: Bead	Damage, especially cutting or nicking by tire tools, worn or undersize mounting edges, and signs of corrosion and/or metal reaction with bead material.	Check same area of wheel for related defects. Replace unserviceable tire.
Tire, interior: Tube	Punctures, foreign matter, weak spots, exposed cord, and manufacturing defects	Replace unserviceable tube. Have minor exposed cord repaired.
	Punctures, age-checking, fold-over damage, thin spots, porosity, cracks (especially around valve stem) and manufacturing defects.	Check same area of tire for related defects. Replace unserviceable tube. Repair punctured tube.
Bearing and cup	Damage, and especially for worn or bent retainers, loose rollers, metal particles in grease, and evidence of incorrect lubrication.	Replace unserviceable bearing. Repack serviceable bearing.