In Reply to: Re: 8N oil pump posted by 36 coupe on November 16, 2017 at 20:32:27:
9N-6608 - Oil pump drive gear and shaft assembly - used in Ford 9N/2N/8N
52-6610A/52-6612A - 11 tooth pumping (driven) gears used in Ford V8
52-6610B/52-6612B - 9 tooth pumping (driven) gears used in Ford V8 and 9N/2N/8N tractors
Face width on ALL pumping gears should be .561/.562
Ford 120 CID industrial engine manual says discard if face width less than .560
Face width on some new replacement gears is .556/.557 out of the box and they give more than a little trouble....