Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 09-15-2015, 10:18 PM   #1
Senior Member
Join Date: Aug 2015
Posts: 133
Air Filter 400 ISL

I was quite surprised at how full of dust my air filter was. It was changed approx 3000 miles ago. I have in that "time frame" traveled into two camp areas that were approx 2 miles of gravel each way......and dusty.Ugh I hate gravel.
The rest of the mileage all Hwy. The indicator , yellow band , was not approaching the red warning. I blew the filter out with blow gun and the dust REALLY came out. The Donaldson cover with the three plastic thread in bolts seem to make a good seal and were tight when I removed filter. I now think the filter should be checked as soon as possible after driving in any dusty conditions regardless of what the color band indicator shows. Is this normal......standard maintenance ?

RIDER FAN 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 09-15-2015, 10:36 PM   #2
Senior Member
Smitty77's Avatar
Join Date: Aug 2010
Location: Over the next hill, around the next curve...
Posts: 2,394
So many variables here. Each coach manufacturer dictates the canister and filter, as well as it's placement. So an ISL400 in one coach, can have may different items with in the front end breathing plumbing when compared to another ISL400 powered coach.

Also, search under Cummins forum, for posts from Spike45. He is, IMO, one of the most knowledgeable members in regards to flirtations of any kinds. (He worked with Cummins/Fleetguard until he retired - and knows of what he speaks!). Spike45 cautions about too frequent of Air Filter changes. A new filter, is letting in more particles. The actual partial clogging of the filter cartridge, adds to it's ability filter better. And, each time you open the front end of the breathing pipeline, you risk contamination, and 'dusting'.

Also, IMO, blowing out a cartridge is never a good way to go. Too easy to damage, and that is damage that you can't see with your normal vision, the cartridges materials. Just not worth the costs of trying to skimp by cleaning out and reusing.

Now, that being said. If I had an unusual sittation that caused severe dirt accumulation on the air cartridge. And I had no way to replacing it. I would remove it carefully using best practices to eliminate dusting risks, and tapping it to remove external cartridge dirt accumulation. (Look for some sites that reflect this, and how to slowly turn the filter as ou are tapping it at about a 45 degree angle. Keep doing so, until you are not seeing dust exit the filter. I was told if you had to do this, to have a shop vac blowing the dust away from the filer in general.

And Rider Fan, I here you about dust build up! Especially with air canisters and or intakes, that are low and behind the rear wheels... Makes you think about the rest of the design, when seeing this configuration!

Best of luck to you, and suspect you will get other input on going ahead and changing an air cleaner as frequently as you feel is needed. Not sure that tis solid advice!

Roo II is our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...
Smitty77 is offline   Reply With Quote
Old 09-16-2015, 10:26 AM   #3
Moderator Emeritus
Gary RVRoamer's Avatar

Fleetwood Owners Club
Freightliner Owners Club
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 16,446
The air filter in my ISL is also seriously clogged by the time the filter minder gets to the halfway point. If I clean it out or change the filter ($$$!), the performance difference is noticeable.

One dusty road is all it takes to suck up a lot of dirt.

My filter capacity is just a few sq inches above what Cummins specs as the minimum for this engine, so it doesn't take much reduction in filter air flow to begin to impact peak performance. That comes into play during acceleration and hill climbing.
Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
Gary RVRoamer is offline   Reply With Quote
Old 09-16-2015, 02:06 PM   #4
"Formerly Diplomat Don"
Dutch Star Don's Avatar
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 7,224
I have a different point of view about changing air filters......First, never blow out or tap to clean a diesel filter. If it's dirty, replace it. You have a $25K-$30K engine and you're going to save money and go cheap by saving on a new air cleaner.

I was once criticized here for saying I changed my Donaldson removable filter on my Monaco every year during service (9K-15K mileage). Two people just couldn't get over the fact that I was spending my OWN money to change filters so often. I was even told that I was being reckless by recommending this. One of those was even mentioned here!

About three months after my post, another poster on the Cummins forum reported that he had dusted his engine. The dusting was caused by a two year old cartridge filter, that could not be inspected, that got water in it from driving in the rain. The filter paper disintegrated and ruined the engine. One of the critical posters read the other thread and saw what happens when you try to get every nickel out of a filter.

My Monaco had the Donaldson removable filter and cost about $55.00. My new coach has the cartridge type and can't be easily inspected, but you can still pull the inlet and look inside. It costs about $165.00. Rather than once a year, I keep one available and change at 15K. I also see a performance increase with a new filter.

Lastly, by the time the filter minder shows a replacement is needed, your filter is long overdue. You can reset them and hard every hard pull, they'll return to the same spot.
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don is offline   Reply With Quote
Old 09-16-2015, 04:07 PM   #5
Senior Member
Pigman1's Avatar
Join Date: Sep 2011
Posts: 1,643
We travel about 100-200 miles a year on dirt and gravel between going to the desert southwest and Alaska and have been pleased with using the filter minder to indicate a change was necessary and we also change on the Tiffin recommendation, every 2 years. We carry a spare with us if it ever becomes necessary to change it out on the road. Never had to use it yet.
2013 Tiffin Allegro Bus 43QGP
2011 Chevy Silverado 1500 Toad
Pigman1 is offline   Reply With Quote
Old 09-17-2015, 08:56 AM   #6
Senior Member
Join Date: Aug 2015
Posts: 133
Smitty , Gary , Don and Pigman 1
Thanks for your input / advice. I never cheap out on maintenance... I think Smitty nailed it with comment on poor design / location. I did not realize using a blow gun to clean it could cause damage to the filter ? if i had like 10k+ miles use I would of replaced it without thinking twice about it. Regardless, it sucked a lot of dust on my two very short "gravel trips" and I'm taking Don's advice and installing new filter. Thanks guys and Happy Trails.
RIDER FAN is offline   Reply With Quote
Old 09-17-2015, 09:49 AM   #7
Moderator Emeritus
Gary RVRoamer's Avatar

Fleetwood Owners Club
Freightliner Owners Club
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 16,446
You should not "blow out" a filter without exercising some care, but it isn't exactly rocket science either. Heck, you can mess up changing the oil or a fuel filter too, but that doesn't mean nobody should ever attempt it.

If you do choose to clean up a filter, be very cautious to get rid of all loose dirt/dust on the outlet side, both in the cannister (if it has one) and the filter surface. Failure to do so can result in that dust getting sucked into the engine when it starts and causing extreme wear rather quickly. When dirt & dust bypasses or escapes the filter, it's called "dusting" the engine.

My air filter costs about $150. That's not chump change at our house, so I will clean up a filter with my air hose if the filter is still otherwise sound. I also check it for signs that water has intruded and damaged the filter media, or the adhesive that holds the media in place is coming loose. Those are fairly rare, but potentially dangerous conditions as well.

So yeah, it's a $30k engine, and yeah, it deserves respect and care, but that doesn't mean I don't dare do anything with it. Just be meticulous in your maintenance.

Just my $0.2. Your mileage may vary...

Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
Gary RVRoamer is offline   Reply With Quote

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
Dometic Brisk Air II Intake Filter frankandbb RV Systems & Appliances 9 09-09-2015 07:33 AM
Water in Air box and wet air filter Gotago2 Ford Motorhome Chassis Forum 25 06-01-2015 08:42 PM
Check your genset air filter smlranger MH-General Discussions & Problems 8 08-20-2014 04:06 PM
400 ISL Cummings Air Filter Austin MAV Class A Motorhome Discussions 7 03-07-2014 02:10 PM
Change the Fuel Filter on an ISL 400 gemini5362 Tiffin Motorhomes Owners Forum 7 02-08-2014 07:27 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:08 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.