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 - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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