First of all do you have any visible leaks in the suction line or the pump? I don't know exactly what the 450 is like, but the 350 suction line has three leak possibilities. They are the connection to the hydraulic unit (o-ring seal), intermediate connection back of engine (hydraulic fitting), and at the pump (hydraulic fitting). If your pump is loosing prime, it sounds like the intermediate connection is leaking as that would allow the hydraulic fluid to flow back into the reservour and the line would be empty. The other two would just suck air when it is running. Roger
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Today's Featured Article - The Rescue of a Fordson F - by Anthony West. Introduction I live in the UK and have for many years restored Fordson tractors (in the main model N's). I have also restored and shown model F's, E 27N's, Field Marshall Series 2, David Brown Cropmasters and the old rey Fergeson T 20. At one time I had seven restored examples which were shown and used in ploughing matches. As most restorers, I have a number of war stories I can relate on a range of topics that may help other like minded and interested people. Perhaps my first p
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