Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 14, 2025 ...

Big concern on fuel hose replacement

September 24, 2018, 06:56:57 pm

Up to now my focus has been on replacing the fuel lines from the tank back to the fuel filter above the start batteries. When we came back I moved the coach far back so the engine was overhanging lawn, and couldn't see where the lines connected with the engine. The first filter is a racor 790R but has a Baldwin BF1329-0 fuel water seperator as the element. The line the goes to the engine but connects to a metal pipe and I can't see where it goes. Then I see another Baldwin filter, a F1259, also a water seperator. I can't find a micron rating on either, so now am thinking this engine has inadequate fuel filtration.
Anyone able to fill me in on how the fuel lines are routed on the Cummins M11 engine? Pictures would be great if you have them. Thanks, bob

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Re: Big concern on fuel hose replacement

Reply #1 – September 24, 2018, 08:17:29 pm

Some pics I took...
I am thinking of just replacing to the first racor filter, putting in a 30 micron filter there, then taking it to a shop to have the other lines replaced from the filter to the engine.
My main concern is that the fuel on this engine was not adequately filtered. Always seems to hesitate before it starts. The first racor had a lot of crud in the bowl, so much that I had a hard time draining it out, and still didn't get it all.  Seems like a dumb move to put two water separators on the engine and not a high micron filter.

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Re: Big concern on fuel hose replacement

Reply #2 – September 24, 2018, 08:46:10 pm

Bob- BF1329 should be 30 micron filter- good for primary fuel/water separator.  Not sure about your secondary filter.  Some of the filters have been updated with new numbers which makes cross referencing a real PIA. 

I hope you find the right filters for your engine, and the right fuel hoses. 
  

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Re: Big concern on fuel hose replacement

Reply #3 – September 24, 2018, 08:55:28 pm

BF1329 is a 40 micron.
BF1259 is a 10

Baldwin Filters Fuel Filter, 9-17/32x3-11/16x9-17/32 In BF1259 | Zoro.com

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Re: Big concern on fuel hose replacement

Reply #4 – September 24, 2018, 08:56:38 pm

Bob,

I'm thinking it's a BF 1259 with a 10 micron rating. Give these guys a call: Cummins M11 Fuel Filters | Diesel Pro Power

Pierce

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Re: Big concern on fuel hose replacement

Reply #5 – September 24, 2018, 09:39:05 pm

OK well then I feel better now. I couldn't find the micron rating on them and though maybe  they were just fuel water seperators. The gunk in the bowl was pretty nasty.  I have a fleetguard FS1000 and a parker R125P Aquabloc Diesel Replacement Spin-on Filter Element 30 Micron for the 790R.
It's still hot as hell here with high humidity and lots of mosquitos. Working outside during the day is pretty exhausting, losing a lot of fluids and electrolytes from sweat.
Anyone know what the tube coming down behind the fuel filter covered in oil is for? Its the last picture above? Found the Cummins engine service manual online  here    still going thru it.
thanks for the help. Appreciate it guys!!
Bob                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

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Re: Big concern on fuel hose replacement

Reply #6 – September 24, 2018, 09:40:39 pm

That is the breather also called a slobber tube.

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