Posted 6/28/2017 09:12 (#6094020 - in reply to #6093977) Subject: RE: JD 4630 1970's vintage
Elizabethtown,KY
There is a check valve on the filter base that can cause that, had to replace one on a 6620 combine years ago. It got to where you had to pump the primer pump anytime it sat over night or longer.
JD 4630 1970's vintage
