There are a series of Blue Ribbon Service Manuals that pertain to hydraulics that I found helpful in rebuilding the valves and power steering on my 240 and 340 Utilities. They are
GSS-1278 Hydraulics: Valves and Systems GSS-1280 Hydraulics: Troubleshooting GSS-1279 Hydraulics: Pumps GSS-1284 Hydraulics: Cylinders
I know the Troubleshooting one has specs on the 300; don"t know for sure if the 300 had same hydraulics valves as those of 240, 340 etc for which valve rebuilding is detailed in 1278.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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