The 1080 and 1085 hydraulics are open center, 1100 series are all closed center, very similar to JD. The 1100 series uses an inlet screen before the charging pump, and a five micron filter between the charging and radial pumps. First models had a bypass valve in the five micron filter that would open and let unfiltered oil through when tractor was not serviced properly. There's a service bulletin to DISABLE that valve to force that final filter change when needed. Dad's 1100 hydraulics have never been apart in over 7000 hours use. IF the inlet screen is serviced as it should be, I doubt there would be trouble as some claim to have. Several 1100 series still in use were I live.
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Today's Featured Article - Tractor Profile: Silver King - by Staff. Silver King tractors were produced by the Fate-Root-Heath Company of Plymouth, Ohio. The company was founded by John Fate in 1884 and was originally called the "J.D. Fate Company". After several mergers over the years, the final company name of Fate-Root-Heath came about in 1919. The first tractor produced was actually called the "Plymouth" tractor and was powered by a 20 HP 4-cylinder engine with a 3x4" bore and stroke. The four speed transmission had a top speed of 25 mph! After more t
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