The Case IH Farmall 85C tractor primary air filter part number is 381423R92. The inner safety filter is A44804.
Case IH Farmall 85C Air Filter Details
| Primary air filter part number | 381423R92 |
|---|---|
| Inner safety air filter part number | A44804 |
| Outer air filter part number | 84479228 |
| Air filter dimensions | Outside diameter: 9.9 in | Height: 16.4 in |
Air Filter Service Interval Guide
Air Filter Service Interval Guide
Listed Filter Size Check
These are practical inspection/replacement guide ranges for the utility tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
Case IH Farmall 85C Extra Air Filter Notes
| Engine model | FPT 4.5L |
|---|---|
| Engine displacement | 4.5 L | 274.6 cu in |
| Engine horsepower | 84 hp | 62.6 kW |
| Primary filter note | For the Case IH Farmall 85C, the listed primary air filter part number is 381423R92. 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 84479228. |
| Safety filter note | The listed inner safety air filter is A44804. Do not remove the safety element for normal cleaning; replace it if dirty, damaged or oil-soaked. |
| Fitment note | Listed dimensions: Outside diameter: 9.9 in | Height: 16.4 in. Use dimensions as a second check, not as the only buying method. |
| Filter size note | The listed dimensions point to a long element length at 16.4 in and large outside diameter at 9.9 in. Use that as a fitment sanity check against the old filter. |
| Power range note | With a 84 hp engine class, the listed element size is generous for the power class, so fit/seal checks matter more than chasing a bigger filter. Watch for weak pull, smoke or heat under load before waiting for the full 300-hour guide. |
| Engine airflow note | Engine size is useful context for service urgency, not a license to ignore the part number. The canister and seal decide fitment. |
| 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 Farmall 85C Air Filter FAQs
Is airflow likely to be sensitive on the Case IH Farmall 85C?
If the tractor is under load, a marginal or dirty element will matter more than it does at idle. Use the size/power combo as a reason to inspect before heavy dusty jobs.
What is the most reliable way to confirm a Case IH Farmall 85C air filter?
Treat 381423R92 as the hero value, not the whole truth. Serial range, engine swaps and different air-cleaner housings can beat a generic online listing.
Is the Case IH Farmall 85C air filter a one-part or multi-part service?
For a full parts check, separate the service element from the safety element: buy the outer/primary service element first, then buy the inner safety element only if it is dirty, damaged or due. Do not accidentally order 84479228 when you meant the safety filter, or A44804 when you meant the outer filter.
What do the Case IH Farmall 85C air filter dimensions tell me?
The length-to-diameter shape points to a large and deep element. That helps catch obvious bad matches, but cover depth, seal compression and end-cap shape matter a lot.
What does the Case IH Farmall 85C air-filter part-number pattern tell me?
The main number 381423R92 should be treated as the control number. The other numbers need their own fitment checks, not blind substitution.
What does the outer-filter listing mean for the Case IH Farmall 85C?
This is not a one-number job. The outer and inner elements have different jobs, so compare both old parts before buying a kit.
What is the biggest fitment trap with the Case IH Farmall 85C air filter?
The trap is assuming a large and deep 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.
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.
