N Board Forum - Expanded Thread Page

Subject: 8N oil pump

[Back] [Return to Top of Forum]

George Peebles    Posted 11-16-2017 at 10:55:41 [URL] [DELETE]        [Reply] [Email]  
  • 8N oil pump
  • I have just had my 8N oil pump rebuilt. When I submerge the pickup tube in a
    container of oil and spin the gear by hand, I can not get any oil to flow up and out of the pump. I tried pouring oil down the hole in the pump to prime it, but after a
    few turns of the gear that oil flows out and then quits. Is there another method to
    bench test this pump?

    36 coupe    Posted 11-16-2017 at 20:32:27 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N oil pump
  • These gears have 2 prefixs in their part numbers.One is 52 another 9n.Called drive and driven.They may have a different width.The 52 is from the 60 hp Ford V8.The 60 engine was first used in 1937.I cant see how you can turn a pump fast enough bby hand.Oil flows around the out side of the gears.Side wear on the gears will give trouble.

    TheOldHokie    Posted 11-16-2017 at 21:34:44 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N oil pump
  • 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....

    TOH

    Ozlander    Posted 11-16-2017 at 19:40:58 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N oil pump
  • Are you turning it the right way?

    TheOldHokie    Posted 11-16-2017 at 12:21:13 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N oil pump
  • Is that the one I did for you? If so check the face width on the gears. I did not measure the ones you sent with the pump and they may be some of the defective ones that are floating around.

    TOH

    [Back] [Return to Top of Forum]


    Top