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Show SfflOTOFM HELPSjftUTOIST Easily-mastered Knowledge Will Prolong Life of Any Car. Abuse of Tires Is Common and Expensive, Declares Authority. The average tiro used by tho motorist motor-ist can bo mado to give thousands of miles of additional scrvico if proper attention i3 paid to inflation, immediate immedi-ate repair of tread in.jurica and proper conditions of tiro operation. This statement state-ment is mado by II. A. Tarantous in an article entitled "Making Tires Last Longer," which appears in tho August Au-gust issue of Motor. Ho emphasizes tho importance of inflation, stating that thousands of tire miles are lost through insufficient pressure. It is a case of npglcct on the owner's part and this must bo overcome if the lowest cost per tiro mile is to bo had. IIo says: ''A tire of certain size is designed to carry a certain weight only when tha pressure of air within is correct. When that pressure is reduced or when the weight is increased beyond that specified, speci-fied, then the tire is operating under conditions for which it was not intended. in-tended. Tho under-inflation (or overloading over-loading even with the correct pressure) flexes the tire side walls too much. This causes the side w-ills to break down. In the case of a fabric tire it is likclv to causo a crack in the fabric, and while cords can withstand moro punishment in this respect than fabric fires, nevertheless, cords also are injured in-jured by uuder-inflation. Study Tire Shape. "The object of inflating a tire to a certain pressure is to give it a certain shapo which ought to be maintained as long as possible. It is perhaps more important to note the shape of the tire than it is to know the exact number of pounds pressure, but knowing that a certain pressure produces a certain shape oue can more conveniently use the tiro gauge. To show the importance import-ance of using the gauge frequently one maker of tire valves calls attention to the possible loss of a great deal of air in a short time duo to a small speck of dirt on the tire valve. Many owners forget or neglect to screw on valve stem caps, with the result that dirt makes its way into the top of the stem. A serious loss of pressure due to this leakage would be detected immediately when the owner uses the gauge. "Small tube repairs are quite easy for the average owner. The simplest and quickest method for small holes such as pin holes, but not much larger than 1-16 inch, is to use cementless patches, which simply require that the patch face be immersed in gasoline, the area around the iniury cleaned with gasoline and rubbed with sand paper ond the patch applied and pressed down firmlv. Both cement and cement-less cement-less of rubber patch and rubber cement. ce-ment. The cement is applied in three successive coats which are allowed to become tacky-after which the patch ia applied and pressed down firmly. Both cement and cementless patches should bo allowed to set for about fifteen minutes. Repairing Punctures. "Tube p-neture? of large sire, one-half one-half inch or ever, should be repaired by means of patches vulcanized to the tube. The stock for patehine jnay be purchased in lrny forms, the most popular being the sheet variety where the exact size of patch is cut from the shee Allow a rmod margin of safety by making the patch large enough. "Before a tube is inserted in a casing cas-ing both should be well cleaned. A little tire talc should be sprinkled over the Burface of the casing. Too much of the talc should not be used otherwise other-wise lumps will form and these may injure in-jure the tube. One of tho commonest troubles with tubes is so-called pinching. pinch-ing. In applving a tire the irons used mav accidentally pinch a small portion of the tube. A" tire may have a break in the fabric, and this might cause a tube pinch. Where flan are used and the flap is inserted so there is a create in it. a pinch may result. When inserting in-serting a tub inflate it enough to . make it. round; then s!:- :t into posi- tinn. Spare tribes -" - 11 be folded evenly and placed in a cloth ha- Many tubes are ruined because they were -- . placed in the tool box or unVr a feat. "There ar? n number of abuses 4 .J wh-ch tires receive, all of which go to-... to-... v.-.trd decreasing tire life. The com- .' nione-t of thee ii caused by misalignment misalign-ment of wheels." |