Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > POWER TRAIN GARAGE FORUMS > Cummins Engines
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-24-2021, 11:56 AM   #1
Junior Member
 
Freightliner Owners Club
Join Date: Mar 2020
Posts: 4
Fuel filters

I recently purchases a 2018 Tiffin Allegro Red motorhome with a 360 HP Cummins Diesel. The instructions for changing the fuel filters is to per-fill the new filters with clean fuel. Can the fuel from the old filters be used in the new filters? If not, what would you suggest?
carolou is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 10-24-2021, 12:01 PM   #2
Senior Member
 
Join Date: Jul 2017
Posts: 285
Don’t use the fuel from the old filters. Get a small portable fuel can designated for diesel(usually yellow color). And go to a filling station, put some diesel in it and fill the new filters from that.
__________________
1995 Bounder 35 UWB, F53
Mr Lars is offline   Reply With Quote
Old 10-24-2021, 12:03 PM   #3
Senior Member
 
Join Date: Oct 2014
Posts: 3,876
I don't know the correct "prime" procedure for your engine, but I can tell you that you do NOT want to use fuel from the old filter to prime the new one.


The outer holes are the INLETS for the filter, so any fuel you pour out of the outer holes will not only be unfiltered, but likely contaminated with anything the filter has collected.


Hopefully someone else who has first hand of how Cummins recommends priming your engine will chime in.


An excellent choice would be to call Cummins tomorrow with your engine serial number and ask them.


There are a lot of "here is how I prime mine" answers, but they may or may not apply to YOUR engine.



Cummins 800-286-6467
__________________
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
wolfe10 is online now   Reply With Quote
Old 10-24-2021, 01:04 PM   #4
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 18,944
It's never a good idea to use the fuel that has collected in an older filter in a new filter. Typically, the old filter collected most of the debris within the element, but larger pieces cold pour out when emptying the old filter. Water and algae could also be in that fuel.

Buy a small one gallon fuel can and fill it with diesel for your fuel filter changes. Prefill the filters by placing a cap over the center hole or a clean thumb and pour the new fuel in around the edges. Go slowly as the fuel will take a little time to absorb into the element.

Many coaches will leak fuel while changing the filters, tilting the coach forward with the jacks can help stop gravity flow.

I like to remove and replace the primary filter, usually the large one with a drain and electrical connections. On some coaches/engines, there is a pump on top of that primary filter. The pump looks like the bottom of a can, about 1.5" in diameter. If you have one, it will often have a slip on rubber cap. If your coach has the pump, depress it until it gets firm.

Once the primary is installed, I start the coach and let it idle for a few minutes. Once I know it's running well, I move to the primary filter. Remove and replace with a completely full filter.

Once it's installed, most Cummins engines will let you prime them by turning the ignition on, without starting the coach, wait 15 seconds and then turn the ignition off. Do this 3-4 times and then start the coach.

Many will come on here and say just put them on and do the engine priming with the ignition, as described above. I've found that to be problematic and the coach didn't want to start. I think many regurgitate that procedure from the engine manual, but have never done it successfully themselves. Either way, it's just not worth taking the chance.

It's a good idea to always carry a spare set of filters while travelling. Carrying a couple of quarts of Diesel Service Power Kleen, available at Walmart, can be used in place of diesel fuel for an emergency filter fill on the road.
__________________
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
Dutch Star Don is offline   Reply With Quote
Old 10-24-2021, 06:30 PM   #5
Senior Member
 
Barneyb's Avatar


 
Fleetwood Owners Club
Freightliner Owners Club
Join Date: Jan 2019
Location: Wadsworth, Ohio
Posts: 263
Quote:
Originally Posted by Mr Lars View Post
Donít use the fuel from the old filters. Get a small portable fuel can designated for diesel(usually yellow color). And go to a filling station, put some diesel in it and fill the new filters from that.
^^^^^^This^^^^^^
__________________
Barney & Penny with our two puppies Lucy & Dixie
2008 Fleetwood Discovery
2020 Jeep Cherokee Trailhawk
Barneyb is offline   Reply With Quote
Old 10-24-2021, 07:21 PM   #6
Senior Member
 
Join Date: Jul 2006
Location: Atlanta, GA
Posts: 204
You can also use Dexron ATF fluid to fill your filters.
grldst is offline   Reply With Quote
Old 10-24-2021, 11:09 PM   #7
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 24,411
carolou, read this: https://www.cumminsforum.com/threads...ilter.1264641/

Quote:
Originally Posted by grldst View Post
You can also use Dexron ATF fluid to fill your filters.
Not with the DEF engines, the ash content will cause problems.
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
Ray,IN is offline   Reply With Quote
Reply

Tags
fuel



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Filters, Filters, Filters! Talk to me about filters! Double B Gear and Product Discussions 8 08-03-2017 02:34 PM
Filters - Filters - Filters Where do you get your filters???? Busskipper Class A Motorhome Discussions 14 03-20-2017 10:01 AM
Filters, filters and more filters tbbg II Newmar Owner's Forum 3 09-02-2015 10:00 AM
How many fuel filters in my coach and would old filters cause overheating? 4tfamily Cummins Engines 21 08-06-2014 04:21 PM
Changing oil, filters, and fuel filters on 2006 Alegro Bus randyf Tiffin Owner's Forum 2 06-01-2011 09:02 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 11:49 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.