Old valve was stuck

Removed six screws on the valve cover using Phillips head screw driver. Three are along the top on the burner side and three are underneath, needing the upper oven door to be opened to gain access. Removed the old valve using screwdriver and 7/16 end wrench. Used same tools to reassemble. Only problem is the valve retaining clamp is hard to get on unless you position it first, before connecting the valve to the line that runs off to the burner. Otherwise, it would have been fairly easy. These valves will stick if liquids are allowed to drip down and under the valve knobs. The channel in the valve stem takes the liquids down to the valve and can cause frozen valves. I bought 3 extra valves to have on hand in case of future failures.