David G has it right. If that 500 GPM pump is moving 500 GPM for any length of time it would be a big load for 55 HP. If it were pumping 50 GPMs at 100 psi it would burn hardly any fuel. You should be able to find out how much your nozzles or whatever flow, at a given pressure and then you can tell how heavily you are loading the tractor. 35 years as a firefighter. The problem with tractors on pumps is lack of auto shut down in case of overheat or loss of oil pressure.
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Today's Featured Article - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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