The Case IH Magnum 400 tractor primary air filter part number is A194198. The outer air filter is 381423R92.
Case IH Magnum 400 Air Filter Details
Primary air filter part number
A194198
Outer air filter part number
381423R92
Air filter dimensions
Outside diameter: 9.9 in
Air Filter Service Interval Guide
Air Filter Service Interval Guide
Dusty use
100 hrs
Average
500 hrs
Light use
1,000 hrs
These are practical inspection/replacement guide ranges for the large ag tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
Case IH Magnum 400 Extra Air Filter Notes
Engine horsepower
435 hp | 324.3 kW
Primary filter note
For the Case IH Magnum 400, the listed primary air filter part number is A194198. Match the number before buying because air cleaner setups can vary by engine, serial range and market.
Outer filter note
The listed outer air filter part number is 381423R92.
Safety filter note
If your air cleaner has an inner safety element, leave it in place while servicing the outer filter so dirt cannot fall into the intake.
Fitment note
Listed dimensions: Outside diameter: 9.9 in. Use dimensions as a second check, not as the only buying method.
Filter size note
The listed dimensions point to a large outside diameter at 9.9 in. Use that as a fitment sanity check against the old filter.
Power range note
This is a higher-airflow class, so restriction matters fast. If it is working in dust, inspect before the 500-hour planning mark instead of waiting for visible power loss.
Service note
Clean loose dust from the air cleaner housing before pulling the filter. Never run the tractor with the filter removed, even for a quick test.
Case IH Magnum 400 Air Filter FAQs
How do I avoid mixing up the Case IH Magnum 400 air-filter elements?
Because no clean inner safety number is shown, treat the visible outer/primary numbers as the main service parts and inspect the housing before assuming there is no safety element.
How should I verify the Case IH Magnum 400 air filter before fitting it?
Treat A194198 as the hero value, not the whole truth. Serial range, engine swaps and different air-cleaner housings can beat a generic online listing.
Can I match a Case IH Magnum 400 air filter by size?
One dimension is better than none, but it does not tell you the full canister fit. Check the removed element before installing.
Can the Case IH Magnum 400 lose power from a dirty air filter?
This is a higher-airflow class, so restriction matters fast. If it is working in dust, inspect before the 500-hour planning mark instead of waiting for visible power loss.
Why are there multiple air filter numbers for the Case IH Magnum 400?
This listing gives you the service-element side of the setup. The housing still needs to be checked for a safety element.
Can a similar Case IH Magnum 400 air-filter number still be wrong?
The primary number looks like a letter-prefix part number. That does not make it automatically correct, but it helps you spot obvious nonsense numbers in search results.
What is the biggest fitment trap with the Case IH Magnum 400 air filter?
The trap is assuming a large outside-diameter element is close enough because it looks right online. The seal face, end-cap depth and cover pressure have to match, otherwise dust can bypass the media.
Official information note
Mistakes do happen. Air filter specs can change by year, engine, serial range, market and air cleaner housing. Check the old filter, operator manual, parts book and official caseih.com website before ordering or installing an air filter.
