Extract from the Taylor Safety Check 2nd Edition - pages 65-68 WARNING Dangerous Action Attempting to service a multi-piece tire and rim assembly without proper tools and training. What Can Happen The tire and rim could explosively separate causing serious injury or death to anyone in the trajectory path. How to Avoid The Danger Allow only trained tire specialists to service multi-piece tire and rim assemblies. NEVER remove a single lug nut or rim clamp without FIRST DEFLATING THE TIRE – and without FIRST DEFLATING BOTH TIRES on dual–tire assemblies. OSHA requires every employer who handles multi-piece tire and rim assemblies to have a training program, a restraining device, and proper tools and equipment, including a clip-on-chuck and an in-line air gauge with enough air hose to allow the individual to stand outside the trajectory path. Ensure that the tire is totally deflated before removing lug nuts or rim clamps. Remove the valve core and run a wire through the stem to ensure that the stem is not plugged and that all the air is exhausted. On dual tire assemblies , all the air must be removed from both tires prior to removing any single lug nut or rim clamp. Never mis-match tire and rim components – use an OSHA matching chart to ensure the components match exactly. Inspect for rust, bent, or damaged parts. Parts must be clean, must fit together, and must seat properly. Throw away unserviceable components. Never force or hammer components especially while they are under pressure; never weld or braze components. Always use a cage or other restraining device when inflating tires. Always use a clip-on-chuck, an in-line gauge, and enough hose to allow an individual to stand outside the trajectory path. Lock rings and other components can be assembled improperly, and they will explode when put under pressure. MD type lockring notch tabs must be out (facing you) . Remember that most accidents occur while the tire and rim assembly are being inflated – Never stand in the trajectory path.