Posted 9/23/2014 09:11 (#4089165 - in reply to #4088821) Subject: RE: Ih Hydralics
Hillsboro, OH
All 66 series are open center as are most 86 series. They originally had 12 gpm pumps but many have been upgraded to 17 gpm upon pump replacement. The late 86 series were closed center, but due to problems with the system, many were converted to open center.