OCR Text |
Show AUTOMOBILE DRIVERS ' SHOULD BE CAREFUL The following advice is presented by this paper to automobile readers: .Even experienced drivers are making the mistake these days of wrongfully Inserting tire tubes in casing, particularly partic-ularly in one regard, the B. K. Oood- right method is based on the best us- . t' age of the leading racing drivers with J the logical assumption that they are j the beet qualified to decide. I Anent tube insertion, one of the w first things to do is to give the bridge nut at ' the base of the valve stem above the oblong metal plate on the tube a tightening twist with a pair of . , pliers. The use of pliers is advised in preference to a wrench, as a wrench : is too powerful for the purpose and -liable to cut the valve through th rubber. it is surprising how frequently a slow leak is due to the loose fit of the tube around the valve. When the tube is entirely in the casing, Jar the tire a few times to seat it Only ; after the tire is mounted and fully inflatedIn in-flatedIn fact, it is advisable to have It slightly over-Inflated is the time to fasten securely the rim nut which works around the valve stem above the rim. , With this nut firmly tightened tight-ened down against the rim. the surplus pressure may be allowed to escape, . t and the tire brought to normal contour for the load carried. The caliper guage is the best means for measuring measur-ing the load. The excess of air pressure acts as a press that firmly ' seats the metal bridge onto the tube into the valve caviy on the ins'.de of the tire. The force exerted on the approximately four inches of metal surface at eighty pounds pressure is thus 320 pounds, and this prevents pinching. |