tractorfix
Member
My new to me 550 was gifted to me because of low power and smoking. Once I got it going i found out it was hazing fuel mist, not smoking so
after battling a whole mess of seized bolts to get the nose and fuel tank off I removed the valve cover and found a sludgy mess from poor
servicing and #1 exhaust broken spring and #2 intake broken spring. I found that Ford N springs are basically the same diameter but a bit
shorter so the seat and open pressures will be low, but close enough that I can run it a bit and make sure the problem is gone before
ordering parts. i found an old parker 3/8 NPT bulkhead fitting that had the right 1NF outside thread so I could make an air fitting to go in
the energy cell hole to hold the valves with air while I swapped the springs. Once I know its good, it'll get 8 new springs, some gaskets and
a nice service
after battling a whole mess of seized bolts to get the nose and fuel tank off I removed the valve cover and found a sludgy mess from poor
servicing and #1 exhaust broken spring and #2 intake broken spring. I found that Ford N springs are basically the same diameter but a bit
shorter so the seat and open pressures will be low, but close enough that I can run it a bit and make sure the problem is gone before
ordering parts. i found an old parker 3/8 NPT bulkhead fitting that had the right 1NF outside thread so I could make an air fitting to go in
the energy cell hole to hold the valves with air while I swapped the springs. Once I know its good, it'll get 8 new springs, some gaskets and
a nice service
