No, I don't think it moves once in place... as I recall, all the relief valve workings are all internal. Some of those valves were crimped so they are not repairable, but some are held together with an internal snap ring and can be dis-assembled. Most of the older ones were this way and I am just guessing, but I'd say this model is most likely that way. Most of the technicians and engineers I knew that worked on these are dead now, so I don't know who I would ask. A dealer's technician would be your best bet. If you take it apart yourself, do it in a clean location where any small parts like springs, shims, orfice plates, etc. will not get lost.
Did you find a way to isolate the pump/relief from the rest of the system?
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Today's Featured Article - More Memories of a Field Service Engineer - by Brian Dye. Introduction: The author worked for one of the largest Ford tractor dealerships in England as a trouble-shooter on tractor engines, hydraulics and combine harvesters from 1963 to 1972. In 1972 he became a dealer manager and finally left the dealer net in 1975 to run his own electronic design and manufacturing company. [Editor] We live right in the middle of Norfolk. The dealership that I worked for sold Fordson Tractors from the 1920's and some of t
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