Worldâs first parking meter installed. Share this: The worldâs first parking meter, known as Park-O-Meter No. 1, is installed on the southeast corner of what was then First Street and Robinson Avenue in Oklahoma City, Oklahoma on this day in 1935. The parking meter was the brainchild of a man named Carl C. Magee, who moved to Oklahoma City from New Mexico in 1927.
Check rate of air pressure buildup: When the engine is at operating RPM, the pressure should build from 85 to 100 psi within 45 seconds in dual air systems. (If the vehicle has larger than minimum air tanks, the buildup time can be longer and still be safe.
2. Slow leaking punctures in the tread are the leading cause of tires losing air. A nail embedded in a tireâs groove may cause a loss of 2 or 3 PSI per day, not 2 or 3 PSI per month as with osmosis. You can check the tire pressure before the vehicle leaves the yard in the morning, yet pick up a nail just a few minutes later. 3. Leaking valve stems and cores are another cause of low tire pressure. Over-tightening valve cores can lead to loss of air. There actually is a specification of 4 inches per pound of torque on a tire valve core. Valve core pre-set torque wrenches are available through tire supply companies.