Had to get a new valve stem the liquid rusting compound has already ruined one new tube in 2 years and ruined the valve stem in the other tire . Buy summer there will be no more liquid rusting compound around this place . So I picked up new valve stems I always check the clearance aisle today they had a hydraulic filter for John Deere 1.90$. Then I found a digital tire pressure gauge Must have been my lucky day the stem was at the top ! Went and took the 4020 for a test drive to check for any leaks in the newer heater system I put in. I’m going to try and buy This old John Deere spreader