The bottom power steering cylinder on my 1991 Ford Versatile 846 won t take grease on the anchor near the back of the housing where the shuttle goes back and forth. I tried using the piece that screws onto where the greesezirk goes and tries to force grease through by hitting the pin into the small chamber of grease with a hammer (sorry, I don t know what it is called) and I tried forcing penetrating oil through it. Neither of those solutions worked. Then we tried removing the pin, but it was stuck. After trying to get it out for a day, we gave up. After another round of working the fields, the other bottom power steering cylinder started having the same problem, and it won t take grease. What should I do? What will happen if those points don t get greased?