I imagine the non-O-ring version would slide freely back to center.
It's just a theory, but is consistent with reported behavior. It would require disassembly of the affected pumps to verify.
----- Original Message ----
From: LHenney <LHenney@charter.net>
To: lml@lancaironline.net
Sent: Tuesday, February 12, 2008 9:18:12 PM
Subject: [LML] 235/320/360 gear dump valve idea
Chris,
Mine has the O ring. However, the O ring is a 013 where the outer two O rings (in the same tube) that hold the poppet cups are 014. They all feel “tight” to me but obviously the spool valve O ring is made to move and not only seal. I guess your premise hear is that the O ringed spool valve would do better than the other?
Larry