I have a YANMAR 1900, 1975-1979. I am in France and cannot get parts for it and am not finding what i need on the net either... The lever (to the right of the seat), forward the lever and the lift arms go down, push the lever backwards and they go up. The rod that this lever moves forwards and backwards, which in turn moves the 'Y' shaped part forward and backwards and depresses and releases the two hydraulic pistons (under the front of the seat). This rod was damaged and was re-welded by the local mechanic. Now when the lever is pushed forward it will not stay in the forward position and it will return it self to a center vertical position, resulting in the lift arms raising themselves and the cutting deck two foot high, momentarily lifting the front wheels off the ground and shaking/rattling the tractor and me!?* I have made adjustments under the seat etc, but this has not helpt. Any suggestions on how to remedy this problem is greatly received and/or where i could buy a replacement part? Many Thanks