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Cummins Filters - bypass

Posted By resto_1 Sunday, December 30, 2018 11:25 AM
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resto_1
 Posted Sunday, December 30, 2018 11:25 AM
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Last Active: Sunday, December 30, 2018 12:06 PM
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Hello All, Happy New Year!

Have a Small Cam NH 230 with spin full flow oil fiter LF670. Wondering if I had a new thread adapter made to accomodate the 2-1/4 x 12 threads of the LF-3000. It should be a direct replacement functionally. LF9325 show as a venturi filter for the LF670, but the web site is hard to follow.
Anybody have any experience? thanks
Geoff Weeks
 Posted Sunday, December 30, 2018 1:54 PM
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No, the 3000 is a full flow with a bypass inside of it. It need a separate drain for the bypass section, it is a small tube in the center of the big spud.
Cummins used to make an adaptor so you could put that filter on a Cat 3406, it had the drain come out the side of the adaptor.
If you want a bypass, why not add a "spinnerII"?
Newto
 Posted Monday, December 31, 2018 1:48 AM
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Last Active: 2 days ago @ 8:37 AM
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why do you want to do away with the LF-670?

Its been doing the job on thousands of engines for years & is cheaper than the LF-3000 (which won't fit anyways without the Cummins adaptor)

Stick with the LF-670.....still using them on SC & BC down here.

( and as Geoff said....the 3000 has in inbuilt by-pass filter so you need the genuine adaptor and extra plumbing to make it work)

Newto
Geoff Weeks
 Posted Monday, December 31, 2018 2:33 AM
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Newt, Many of the truck oil change shops and truck stops have stopped stocking the filters for even the Big Cam 3's I carry my own filters for just such a reason. They are still easy to get, but few shops keep them in inventory. It is my guess why he wants to change.
They do stock the 3000 for big cam 4 and up.
Newto
 Posted Monday, December 31, 2018 10:06 AM
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ahhh......ok.

then it makes sense to do what you do....buy a box of filters & carry 1 with you at all times.

Newto
Geoff Weeks
 Posted Monday, December 31, 2018 12:28 PM
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Forgot to add, You can uses the LF9325 in place of the LF670 if you want. It attempts to do the same thing that the 3000 does. It has a bypass section but uses a venturi to increase the pressure differential across the bypass section when compared to the full flow section. Both feed the main oil gallery like a conventional full flow filter.

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