farmall 350 regulator valve piston help!

F-12 guy · Apr 24, 2012

On my 350 I have a continuous high pressure in the Hyd. System. I drained to old fluid and clean out the reservoir and installed a new filter thinking that may be problem. It was not, I took the regulator and safety valve block off next and took apart and found a plugged up orifice screen and the top part of the regulator valve piston mushroomed. I checked with CASEIH and can't get the piston any more. What should I do try to use it like it is or find a use one. Anyone know where to start looking for one. It is not mushroomed bad it will still fit in the hole in the regulator valve seat. Thanks Josh. I'll try to post pictures when I get home

pete 23 · Apr 26, 2012

Make sure the spring in the regulator piston is ok
also. It should be tight but compressible. It is a
shock absorber. Also, I would drill the orfice out
to .031 if it is not marked that now. Original was
.024. I think I would find a different piston and
there were changes made in their length also.
Original had a pin in the cover that piston stopped
up against. Later had no pin, most pins were cut off
flush and newest piston installed but there is just
no way of knowing what combination you will find.

F-12 guy · Apr 26, 2012

Thanks for the reply, I'll check about the orifice being drill out when I get home, I do know that there is no pin in the cover to stop the piston. I noticed it on the part diagram but it was not in mine. I was able to find another whole valve on line for sale. What does drilling out the orifice do, help? Thanks Josh

farmall 350 regulator valve piston help!

F-12 guy

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pete 23

Well-known Member

F-12 guy

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