I had a problem with my D4 only the pressure never went down ... I replaced the gauge... problem solved! I borrowed a working gauge from another tractor to test the problem first. Hope this helps.
Great Idea. Will try to find one to borrow to test my system and gauge.
thx
To start with loosen the feed line to gage while runing to see if you have flow, if you do then remove gage and bench test it using regulated compressed air, start with the pressure low and work it up, not sure what the pressure range is for the factory gage.
Without doing a Search, I'm thinking its less than 30 psi?
If you do bench test it as Steve A suggested, definitely use a Regulator starting at Zero, then raise it real slow!
when i bench tested my D2 pressure gauge it maxed out at 30 psi
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