Decal says: RECOMMENDED AIR PRESSURES FOR TIRES USED ON FARM TRACTORS FRONT TIRES - - ALL SIZES 1. 4 PLY TIRES - - - - - - - - - - - - - 28 LBS. 2 6 PLY TIRES - - - - - - - - - - - - - 36 LBS. REAR TIRES - - ALL SIZES 3 MINIMUM AIR PRESSURE - - - - - 12 LBS. 4 WHEN PLOWING INCREASE AIR PRESSURE IN FURROW WHEEL TIRE - - - - - - - - - - - - - -4 LBS. 5 WHEN SPECIAL HEAVY WHEELS ARE USED OR HEAVY LOADS ARE CARRIED ON THE TRACTOR THE AIR PRE- SSURE MUST BE INCREASED. SEE TIRE & RIM ASSOCIATION SCHEDULE OR WRITE TO THE TRACTOR MANUFACTURER. 6 MAXIMUM PRESSURE FOR 4 PLY TIRES - - - -16 LBS. ADOPTED BY TIRE & RIM ASSOCIATION 3-1-38
