Power beyond port

[richp]

On my 7119 and 4040, the hydro lift valve doesn't have a power beyond port but does have a spot for it along with casting marks labeling it as PBY. I wonder if this port can be drilled and tapped for use. What do you guys think?

[DMedal]

well, I'd want to have a line on a spare valve before I started. Are you a bold machinist type? *smile*

[D-17_Dave]

Often a PBY section of a valve has a port but it also has an insert that helps direct the flow under pressure into this sectionof the valve body. IMO you would be dissapointed in the results of going into the valve yourself.

[richp]

Dave, if I found a 2 spool valve from a newer powrmax,would it bolt right up to my 4040?

[D-17_Dave]

Yes. This is a common modification on these tractors. But you'll need more hardware to complete the swap and be satisfied. You'll need both lift levers and the corosponding linkages. You'll also need the metal line goint to the front that plumb into the extra ports of the 2 spool valve. You'll need all this to make the 4040 like the later model tractors.

[richp]

Thanks guys. I had to replace the float, as this one had cracked pucks and they were hitting the center of the carb. Can't believe how expensive Onan parts are.