My 404 was like this when I got it. Basically it had no oil pressure at idle and very little with the engine spun up. The oil pump end cover was so warped it had blown the spacing gasket completely out on one side.
Sanding the cover and the pump face flat and using a new gasket with loctite fixed it right up.
I've now got about 25 pounds at low idle hot and 45-50 at high idle. Good enough for me...
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Today's Featured Article - Diagnosing Engine Difficulty - Diesel Tractors - by Staff. The following suggestions are listed for your assistance. You can make simple adjustments on your tractor that will improve its operation and save you the time and expense of hiring someone to do it for you. Always make one adjustment at a time, and if the adjustment made does not improve the condition, return to the original setting before proceeding to the next adjustment. Hard Starting Cold air temperatures. Insufficient fuel.
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