QUESTION: Identify this "adjustment" screw ???

TSO · Jan 6, 2015

I was checking system pressure today... running at 2300psi at the remotes at PTO speed. This apparent "set screw" is located directly at where the hoses come out for the rear remotes. I adjusted it both ways, but it didn't change the PSI at the remotes. I adjusted it both with minor turns, and major turns, and still, the pressure remained 2300psi. So, I'm now thinking that it isn't a relief or PSI adjustment screw, but it must adjust something! The screw has a pin-hole in the side for locking it into place (I had removed the pin while adjusting), and those allen-head bolts are just there for "stops" so you can keep the screw turned in a position (they stop the set-pin from moving more than a 1/6 of a turn).

Thoughts?

FYI - my loader numbers are rated to run at 2500 psi, so I was checking the rear remotes to see if this was the adjustment spot for the relief system. According to the manual, system relief is set at around 2275psi, so 2300 on this analog gauge seems spot-on.

Massey 1648 HST

oldnslo · Jan 6, 2015

Not familiar with your tractor but is it possible this screw limits the flow rate to your rear QD's? I know some tractors have this feature just not sure if yours is one of them.

TSO · Jan 6, 2015

oldnslo said:
Not familiar with your tractor but is it possible this screw limits the flow rate to your rear QD's? I know some tractors have this feature just not sure if yours is one of them.

Do you mean like a "restrictor" to slow the GPM ? If that is a feature this tractor has, it isn't indicated in the manual.