WHEELS A CORVAIR 500 70 IN Page General Description 3 20 Maintenance 3 20 Testing Tire Pressures 3 20 Puncture Inspection 3 20 Changing Road Wheels 3 20 Interchanging Tires 3 21 Cleaning Whitewall Tires 3 21 Service Operations 3 21 GENERAL C All models carry disc type wheels with tubeless type tires The wheels are connected to the front wheel hubs and rear axle shaft flanges by four studs and nuts each MAINTI TESTING TIRE PRESSURES The correct tire pressure is Front 15 pounds cold Rear 26 pounds cold Frequent checking is essential with low pressure tires as variations of only a few pounds make an appreciable difference in riding qualities handling ease and tire wear It should also be general practice to check tire pressures each time a car is brought in for service not only as a convenience to the owner but also to reduce the possibility of owner complaint of riding steering or tire wear due solely to improper tire inflation Checking inflation pressures should be a part of every lubrication job If too high a pressure is used in the front a complaint of oversteer may develop The following recommended pressures must be maintained to obtain maximum tire performance Starting Pressure Front 15 pounds Rear 26 pounds Hot Pressure Front l8 pounds Rear 30 pounds ND TIRES O AND 900 SERIES EX Page Correction of Irregular Tire Wear 3 21 Dismounting and Mounting Tires 3 22 Tire and Rim Repair 3 23 Balancing Wheels and Tires 3 26 Static Balance 3 27 Dynamic Balance 3 27 Wheel Runout and Eccentricity 3 27 Testing for Tire Noise 3 28 iESCRIPTION The tires used on all models are 6 50 x 13 4 ply The spare tire is mounted in the front compartment A scissors type jack stowed under the tire and a combination ratchet type jack wrench wheel nut wrench and hub cap remover are supplied with all models NANCE The pressures do not increase more than 4 5 pounds when heated under hard driving Do not bleed tires to reduce this higher pressure When checking tires servicemen should be careful to reinstall valve stem caps These caps provide an essential function in keeping dirt out of the valve thus reducing the possibility of slow leaks through the valve PUNCTURE INSPECTION Every 1000 miles or at each lubrication the tires should be inspected for puncturing objects If such are found they should be removed and the tire repaired as explained in this section CHANGING ROAD WHEELS To change the road wheels using the jack that comes with the car observe the following procedure 1 Set hand brake and block front wheels if rear wheel is being changed 2 Remove hub cap or wheel disc and break wheel mounting nuts loose enwv u eune u um n