Dual Fuel Filter Head

[Sri Ram]

My Cummins B-series shop manual shows an optional dual fuel filter head availible. Has anyone tried it? Would it create too great a restriction/load on the lift pump?

 

[Forrest Nearing]

I would assume that the filters would be in parallel vs. series. which would cut the load/restriction in half. should be just fine in series though

 

[PToombs]

Forrest, they are in series. Most of the industrial engines have them. You just remove the stud, put on the adapter and a longer stud.

I can't say how much restriction there is on them. I know the primary filter is physically larger, and the secondary is the same size. No idea on micron ratings.

Fleetgard FF1280, and FS1251 are the common ones we use at work. (I think that's right).

 

[JLEONARD]

My opinion is that IF the one filter works fine and does not give you trouble... ie protects the engine and has good life before it clogs, then leave it.

I'm a boater... I have multiple filters ahead of the engine, dual filter on the engine... the more filters, the bigger PIA when/if you have a problem... and the more expense come time to change them.



But IF you decde to put on multiple filters, I suggest "multi stage filtration" rather than all the elements being the same size.

In other words the first filter should be something like 30 or 40 micron, and the next filter the size you want to protect the engine... I think ours are 7 or 10 micron (or go to 2 micron if you want). This way the small filter will last longer and have less restriction for a longer period of time.

That's how we boaters do it. and it works really well.



BTW my truck filter lasts a year easily... I only change it because I feel I should. I never had it clog and I put easily 20/25 K miles on it per year.

 

[dpuckett]

... BTW my truck filter lasts a year easily... I only change it because I feel I should. I never had it clog and I put easily 20/25 K miles on it per year.

Wow, I can barely get 10K out of a filter before the local trash (fuel, not people) clog things up. I think I accidentally went 12K one time. I have a fuel pressure gauge, but it still verifies my gut feeling.



Cheapskate Bill from Terre Haute has a dual filter setup on his crew cab engine.



Daniel

 

[Forrest Nearing]

yeah, it just depends on your fuel quality... I got over 40k miles out of the last filter on my '98 before I noticed it was down on power/boost. In my old 1st gen, I honestly didn't change the filter for over 100k miles! LOL

 

[Sri Ram]

But IF you decde to put on multiple filters, I suggest "multi stage filtration" rather than all the elements being the same size.

Yes, that is my intention. I change my fuel filter every other oil change, approx 12,000mi. I run 10-20% biodiesel year-round and would benefit from the added filtration. The cleaner the fuel going to the engine, the better! Many engines come factory-equipped with multi-stage filtration. Why not ours?



I wasn't able to find micron ratings for the FF1280 or FS1251 in a brief web search or at Fleetguard, but I think they are 10 micron. I'll put in a call to CumminsNW. Baldwin makes 4 micron filters that ought to fit. More info from JLEONARD, et al, at this thread: https://www.turbodieselregister.com/forums/1st-generation-ram-forum-1989-1993/178943-some-balwin-filters.html

 

[sdstriper]

A fuel pressure gauge is a must, multi-filtered or not. I don't think I have needed to change a filter yet, I did change some before psi gauge and have change them chasing leaks and/or eliminating leaks (WIF sensor). I probably wasted two or three before gauge, figured cheap insurance, could have went towards a gauge set-up...

 

[Shadrach]

You can't run the stock Cummins dual filter setup in a 1st gen because of the throttle linkage brackets. You could of course mount a pre-filter somewhere before the engine where ever you have space. Shadrach

 

[Sri Ram]

You can't run the stock Cummins dual filter setup in a 1st gen because of the throttle linkage brackets

Shadrach, can you provide a little more information? Have you tried it or known someone who has?

 

[PToombs]

News to me! I've seen a few on trucks and a lot on the industrials. I was going to do it on mine, then decided I don't really need it.

 

[Shadrach]

With the dual filters the second, and larger one, sticks out at about a 45* angle towards the master cylinder. With the big linkage bracket there is no way it would fit. I will try and get a picture for you later. Shadrach

 

[Sri Ram]

With the dual filters the second, and larger one, sticks out at about a 45* angle towards the master cylinder. With the big linkage bracket there is no way it would fit. I will try and get a picture for you later. Shadrach

Thanks. In the B-series manual, it looks like the head can be swiveled so that both filters are in-line with the block.

 

[Shadrach]

Don't forget that the second filter is bigger in diameter. Shadrach

 

[Shadrach]

As per 1st gen.org:

For anyone interested in using the Cummins 4b, 6b and 6c dual fuel filter head it can be used on a 1st gen without any modifications to the fuel supply tube and or throttle bracketry. I have one on my 90 6BT in the crew cab. I don't have a way to post a pic, sorry. The way it works, you can swivel the head any which way you please to clear any obstacles. Shadrach, Daniel Puckett posted in the TDR thread that I had one on my crew engine. Nice thing about the two filters, besides the coolness factor, is they are the same price combined as the single fs1232 or fs1221. Actually some change less than the single. I don't have the part numbers right now for the filters. I could dig up the receipt if there's interest.



I picked up the dual filter head, threaded adaptor and wrote down the part numbers off the two filters at the junkyard and it was no charge . Part number for dual filter head is 3915240. It will require the different threaded adaptor and a different o-ring seal between it and the head. I checked for the heck of it at Cummins and goodness, the head itself was like $80. Can't remember what the adaptor was. I bought two new o-rings and they were less than $5 a piece. You'd probly be better off scoring this setup at a junkyard if you could.



There are one of two ways you can get the part numbers for the items you need for this setup. If you have a good Cummins parts guy, he should have all parts catalogs available for 4b, 6b, and 6c mechanical, on road and off road. I didn't have the ESN at the time of this swap, but the parts guy opened up a couple 6c catalogs to find the parts breakdown. The first one, I think it was on road engines, showed a single filter. The off road mechanical engines had the breakdown for the dual filter.



Oh and the second way to look up these part numbers if you call the Blue C is with this ESN (engine serial number) 45048291. I found it today at a jobsite, there was a Komatsu Cummins lol motor in a crane of some sort. Had a 6B with this dual filter head. Plus it had a Bosch VE pump no afc, turbocharged, so it had a mechanical shutoff, CK. TDR members feel free to copy/paste this and post over there. Bill Gilbert 1stgen.org - where the knowledge is .

______________Shadrach

 

[Sri Ram]

Sounds like a go. Thanks for the research, Shadrach!

 

[WOTURBO]

Can I Use This Filter Set Up On My 95 12v? What Filter Would I Use For The Water Drain And Sensor?

 

[therabbittree]

mummn, I've been running the dual filter setup on my two trucks fro years with no problems. . in fact i have the dual head filter on the engine and my dual big filters on the the tank currently. . My dual filter head was on a marine b series aI got froma lobster boat etc... . my dual filters clear the throttle brackets just fine. . my old truck was auto and my current truck is a manual

this a older picture from my auto truck you can see the dual filters etc

Picasa Web Albums - Deo - 89 dodge truck

I will try and get a better picture soon

Thanks

Deo