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JDP
02-09-2013, 03:04 PM
Hello guys,

I recently bought a 1939 D2 serial number 3J2831SP and I'm having troubles finding the correct oil filter, it still has the bypass system on it as there is a washable filter ontop, followed by a steel seal, then a spring and a housing that sets ontop of a smaller filter...the current filter I pulled out is a Massey fergusen filter number 835 817 M91 but I don't believe that it the correct filter as it cross references to a napa 1010 which does not fit due to the shaft hole being to small. Also I've read that if the bypass system is still present it will have a "T," handle on the filter housing and if it were converted it will have a hex bolt with a line through it...mine has a hex bolt through it but no line through the middle. I've attached a few photos as well. Any help would be appreciated

ccjersey
02-09-2013, 04:56 PM
NAPA 1165 or Wix 51165 are the disposable bypass type filters.
Full flow are NAPA 1161 and Wix 51161

Sorry, I can't quite understand how it all came out of there. Any chance of a picture with it all laid out in order including the bolt down through it?

JDP
02-09-2013, 06:02 PM
This is where I'm having trouble the 1165 an the 1161 are both to long of a filter, the filter I pulled out is only 4" tall...the filter housing is 7" tall on both the removable top piece and the bottom piece that is attached to the cat itself...I have attached a couple pictures of how it all comes out

Jack
02-09-2013, 08:13 PM
Is this an using Cat or a museum Cat? If it's an using Cat, I would convert it over to the newer full-flow filter. It's easier and cheaper to service. Some Cat salvage yard will have the pieces.

My D2 5J was converted long ago, before I got it. I've had it for over 40 years, so the conversion sure didn't hurt the longevity of the engine!

drujinin
02-09-2013, 08:31 PM
That is the early bypass filter system. My book doesn't go back that far.

Machias cat
02-09-2013, 08:44 PM
JDP,
I have one of those filters on an early D2 3J. I have the current CAT part number of the replaceable filter element that goes inside the brass washable one. I won't be able to supply that number until late Monday, but I do have the information.

That early bypass design is a bit of an odd duck; I had a devil of a time taking mine apart just looking at the parts book to figure it out. With the two hooks that go over the "ears" of the mating part, it was not real obvious how it was put together. That and the "rock hard" o-rings between the mating parts made dis-assembly fun.

STEPHEN
02-10-2013, 11:08 AM
I recall seeing that style housing in my book as a field modification to the early filter housing. It also could have been used as factory install for a short time, I don't remember that part exactly.

shovel man
02-10-2013, 04:13 PM
According to my 1955 book what you have there is the field Installation filter group for machines 3J1-3J2883,
part # for the filter Element in the top section is 5B8934,

the 1938 parts book shows # 5B96 Filter and Purolator # 20309X for the original filter .

shovel man.

Old Magnet
02-10-2013, 05:16 PM
Shovel man is correct, that's a field installation auxilliary filter unit that mounts on top of the regular two screen element lower housing. Current upper element is a Cat #1R0727 or WiX #51169 or Baldwin #PT61-HD element.

Replaces the original #5B8934 and #8B5935 filters.

This is still a by-pass system. The hex nut does not imply a full flow filter as the later slotted head hex (most of them) do. Appears it can be converted to full flow but will take several new parts besides the later conversion kit to get it accomplished. Probably easier to just change out the whole thing for a later full flow unit.

JDP
02-11-2013, 12:43 AM
Thank you guys, I appreciate you taking the time to help me out, I now at least know what kind of system I have on there and what parts I will need, again thank you all very much for your input!

ccjersey
02-11-2013, 07:35 AM
I still don't have a grasp of this arrangement. What was the purpose of the kit? Was there still a filter in the housing below this kit?

drujinin
02-11-2013, 09:06 AM
My guess would be as it is a "Field Install Auxilary", that it is to extend out the maintenance hours???
I could see this on a Genset or Power Unit.
But not sure of the Theory on a tractor engine.....

Old Magnet
02-11-2013, 10:18 AM
I don't have more info on the D2's but the same arrangement was used on the early 7J D4 tractors. Was called either a supplementary element changeover group or auxilliary filter group (field installation) so it came from the factory with some units or could be added to the base two screen element filter. Note! The screen assembly used here is not the same as the standard filter model.

Part of the evolution in filtering beyond the capability of screen element only.

Machias cat
02-11-2013, 06:39 PM
As per previous responses, the part number is 5B8934 that then was superseded by 8B5935 and was then superseded by 1R0727, per Old Magnet's response.

Crosses to these according to the Internet.

BALDWIN PT61HDBALDWIN PT61-HDBIG A 92169CARQUEST 85169CATERPILLAR 5B8934CATERPILLAR 8B5935CATERPILLAR 1R0727CATERPILLAR 8B-5935CATERPILLAR 5B-8934CATERPILLAR 1R-0727CO-OP PM-8B5935CO-OP PM8B5935COOPERS AZL080CROSLAND 560DELUXE FC-173DELUXE FC173DONALDSON P555935FLEETGUARD LF601FLEETRITE LFR8601FLEETRITE LFR-8601GENERAL MOTORS 6436830GENERAL MOTORS 5570524GUD GP23HASTINGS PT61HDHASTINGS PT61-HDKRALINATOR L803LUBER-FINER LP1655MOTORCRAFT FL 79MOTORCRAFT FL79NAPA 1169NELSON EX60NELSON EX-6-0PUROLATOR H45123ROL-PAK SHORTXBPROL-PAK SHORT X-BPWIX 51169
FRAM C1655PLfilte

drujinin
02-12-2013, 05:58 AM
Re-reading the comments on it, I guess I am not getting it either? I had assumed there was still a bypass filter below. Now I see where it is a 2 element screen below, with this bypass filter above.