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Subject: 2n oil filter assembly

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Francois    Posted 09-18-2020 at 18:39:05 [URL] [DELETE]        [Reply] [Email]  
  • 2n oil filter assembly
  • Hello, I was changing the oil filter on my 2n for the first time and I noticed there is no spring in the bottom of the container assemble like there is on my 9n (both have the spring on the lid). I noticed that instead my 2n has a small cylindrical part on the bottom on which the filter sits. Does anyone know which one is correct? I think They should be the same?

    Tim Daley(MI)    Posted 09-19-2020 at 07:12:18 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 2n oil filter assembly
  • The lid has a spring. Does your lid leak? No? Move on. Yes? The rubber flat gasket under the lid, and/or the 01A-6749 lid bolt seal has failed. The bolt seal is a fiber type material and works great. Twenty years ago when you bought a new FRAM C-3P or equivalent oil filter, you also got in the kit the large rubber flat gasket that goes under the lid and the 01A-6749 bolt lid gasket -see PIX. Nowadays when you buy a new oil filter, even from CNH, you don't get that 01A-6749 bolt seal, and some don't even give you the large rubber flat gasket. Also, the FRAM C-3 (and other brands) filter don't have the little handle on the top if filter to assist easier removal when you change the filter. The good news is the lid seal/washer part is still made and sold at CNH -SEE PIX. Now some fellas may have had better luck than I using steel, copper, nylon, or plastic washers for the seal, but I never did -they always still leaked. About 16 years ago I bought a handful at my local CNH dealer and stocked up. Also good new20 years ago that first seal I bought is still on my 8N oil filter housing so they are reliable. The ESSENTIAL MANUALS and MPC's are important tools, look at the MPC's in our MANUALS forum.




    Tim Daley(MI)

    Francois    Posted 09-19-2020 at 16:00:15 [URL] [DELETE]        [Reply] [Email]  
  • Re: 2n oil filter assembly
  • Thanks, Tim. Great info and the diagram is really helpful. So I guess the previous owner of my 9n added a spring instead of part 18677. Can you explain the oil flow then through the filter? I figure the oil comes through the bottom of the canister through the part 18677 then moves from within the filter outwards and exits through the side exit line, however since the filter is not mating with the canister lid, this must not be correct?

    JMOR    Posted 09-19-2020 at 17:32:31 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 2n oil filter assembly

  • Francois    Posted 09-20-2020 at 11:41:48 [URL] [DELETE]        [Reply] [Email]  
  • Re: 2n oil filter assembly
  • JMor! Thanks for such great information. Now I understand. I am so surprised thas all the oil flows through such a small orifice? Does all the oil (100%) flow through? That is what creates the oil pressure in the system. I am getting around 20 psi with 15W40 oil. Thank you so much for sending the pictures.

    JMOR    Posted 09-20-2020 at 17:16:16 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 2n oil filter assembly
  • No Sir, all the oil does NOT flow thru that small orifice. This a a partial flow or some call it a bypass oil filtering system. Most of pump output is routed to crankshaft main & rod bearings, but a small flow passes thru the filter/orifice. The idea being that over time, all the oil gets filtered......I have no idea what that time might be...hours, days, months??? In more modern engines the flow goes from pump, thru filter & to bearings & is a "full flow" system. Great improvement as no unfiltered oil goes to bearings.

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