linemechanic1
Member
Running a segmented fan belt without any understanding of how the tension adjustment is accomplished is a big factor. The belt seemed fine at first but after a few minutes it must have seated down in the pulley?and loosened up, which means the fan AND PUMP quit turning. What should have happened next is that the overflow under the radiator cap at the filler neck should have pushed the cap seal spring up and released the pressure at around seven pounds. The counter clerk at NAPA who sold me the cap said it was the correct one for my tractor according to the chart in his computer. He was wrong. This afternoon I checked the cap in the installed position and found that the spring in the cap COMPRESSES COMPLETELY and presses the seal down so tight to the seat in the radiator filler neck that it is locked solid on the seat;there is NO spring relief pressure left. I was able to determine this because the blown open seam at the tank means I can reach my whole arm in the tank top and feel that there is no spring left in the cap seal, it is completely sealed,locked solid at the bottom of the filler neck seat. As another poster said, it must have gotten up to 50 PSI or more before blowing the seam out.