Air filter

[CityElectric]

I have a 2003 alpine 40' fdts, im trying to replace the air filter
but no catalog number on old unit.
Has any one replaced there air filter and if so what and where did you purchase.
Thank you
mike

[Old Scout]

Lots of discussion on this topic on the forum..try using the search function and use "f104" in the string.....you have 2003 Alpine, do you have a 350 or 400 Cummins? Makes a difference base on size of alignment cone in rear of canister. Air filter for the 400ISL is…..AF25549 at Cummins....Don't know number of filter for 350 but it is a different size opening for alignment cone. Using 350 filter on 400 engine can/will dust your engine!!!
PS--should be around $85-90 at Cummins--heard of owners pay as much as $150 at NAPA or on internet!!!!!!

[lazybyrd]

My ‘03 ISC 350 takes a Wix 46904. About 85.00 online.

[CityElectric]

Originally Posted by Old Scout

Lots of discussion on this topic on the forum..try using the search function and use "f104" in the string.....you have 2003 Alpine, do you have a 350 or 400 Cummins? Makes a difference base on size of alignment cone in rear of canister. Air filter for the 400ISL is…..AF25549 at Cummins....Don't know number of filter for 350 but it is a different size opening for alignment cone. Using 350 filter on 400 engine can/will dust your engine!!!
PS--should be around $85-90 at Cummins--heard of owners pay as much as $150 at NAPA or on internet!!!!!!

Thanks for the info
I have a 400 Cummins motor

[Mocha Latte]

Replaced mine awhile back. Took the S/N off the engine plate and went to NAPA and they looked it up. Cost was about $60. When I inspected the old one I noticed that the only area that was really dirty was the surface in contact with the vent tube. This begged the question as to whether the filter needs to be replaced or just rotated so that air is passing through a clean surface. Of course, I may not understand the way that air is circulating through the compartment.

[Janet and Todd]

Mocha,

I had this discussion yesterday with the tech at Cummins when they replaced mine. He said that the compounds in the filter paper degrade over time too so it's not just about how dirty the filter gets. I rotate mine about once a year and have replaced it twice now in 5 years of ownership. No dusted engine for me.

[Mocha Latte]

Janet and Todd,

Thanks for the input. It does make sense since it is subjected a very hot environment. I always learn something new on this forum.

[Mike and Amy]

We have a 2005 ISL 400, fdds 34' Our filter number is a Fleetguard AF25549 available for $75.00 at this site

https://puredieselpower.com/products...r-af25549.html

I have also purchased them off of ebay.

Hope this helps