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Show PLUNGtR NEW Motorlsta are oftei pussled to know I what keeps lhe air in the lire. A sensitive sen-sitive Mitie msqlianisnx commonly I ailed the plunger and strong enough' ' lo hold back air pressures as high as I SiVenty to 125 pounds to the- square Inch, functions here. This little valve-Which valve-Which consists of a plunger a'ooul at) '. inch Ioiik. a bit of spring and rubber, ' is responsible for the well being of the ! tire. it is located inside the valve stem, nd seats ggginat a threaded metal core, It should never bo removed un-! less absolutely necessary. When li . iaksn out ii should not be replaced unless all llo parts are in perfect, working order, according to Miller tire i men. Whep inflating a tit" the motorlsl .-.ometimes accidentally bends the wire plunger, throwng the valve working pails out of line. Sometimes il be-comes. be-comes. corroded, sometimes dlrly or ii isplabed when thus handicapped, i, cannot perforin properly Its duties of keeping the air in the tiie. At the top of the valve stem is a small cap which assists the valve bv , protecting ii against dust which would ,' ordinarily coliect there. Thin cap of-. of-. : also additional prbteolloii againsi air leoJfjtge. for It is fitted wlh a rub-bcr rub-bcr washer which forms, an air tight seal over the stem. But there is a third device which as-ists as-ists in keeplnp air In a tire A lock washer fits under the dust cap, down ...er th valve and seats on the part lit the wheel to which lhe spokes are I anchored. The hexagonal nut acts as hi seal to prevent dirt, water and other fonelgn substances front creeping past ' 10 ruin the inner tube" and valve base Contrary to the usual supposition, it! . does not prevent the rim or tiro from clipping on Ihe wheel. These three parts are Inexpensive.' and if they are found lo be worn out, j or out of order, they can easily be re- : placed at a trifling expense. Almost . inv dealer or garage man will he able to furnish them. Kgiluro to have th-rn examined may oosi ihe motorist many dollars In tiro undi rlnflatlon. in rim I ' iiIIIiib, in bruises and in blow-outs. |