Try putting some pressure to that breather port when the engine is running. The 300U system needs to have the line to the pump primed if the fluid level drops too low. You may have lost prime. It only takes about 5 psi and takes maybe 5-10 seconds. When the pump primes you will hear a change in engine sound while it brings the system up to pressure. If it doesn't prime in a minute or so, then it's time to take the reservoir cover off and check the screen. I used a engine hoist to remove the cover on my 300U. It isn't all that heavy (maybe 40-60 lb?), but it's awkward, and you don't want to set it down on a flat surface as you'll crush the screen.
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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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