The Case IH Farmall 25A tractor primary air filter part number is 1265510C1. The inner safety filter is 381423R92.
Case IH Farmall 25A Air Filter Details
| Primary air filter part number | 1265510C1 |
|---|---|
| Inner safety air filter part number | 381423R92 |
| Outer air filter part number | 381423R92 |
| 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 compact tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
Case IH Farmall 25A Extra Air Filter Notes
| Engine model | Mitsubishi 1.3L |
|---|---|
| Engine displacement | 1.3 L | 79.3 cu in |
| Engine horsepower | 24.6 hp | 18.3 kW |
| Primary filter note | For the Case IH Farmall 25A, the listed primary air filter part number is 1265510C1. 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 | The listed inner safety air filter is 381423R92. 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 24.6 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 250-hour guide. |
| Engine airflow note | The displacement helps identify the engine family; horsepower tells you how hard it breathes under load. The element still has to match the canister. |
| 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 25A Air Filter FAQs
What does the Case IH Farmall 25A horsepower and filter size combo tell me?
Horsepower tells you airflow demand; length and outside diameter tell you rough element size. Together they say whether restriction is a service concern or mostly a fitment check.
What is the most reliable way to confirm a Case IH Farmall 25A air filter?
If the old filter is missing, use 1265510C1 plus the housing measurements as a two-step check. If either the seal or cover depth is wrong, do not run it.
Is the Case IH Farmall 25A 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 381423R92 when you meant the safety filter, or 381423R92 when you meant the outer filter.
Are the Case IH Farmall 25A air filter dimensions enough to buy from?
For this shape, do not eyeball it from a product photo. A close-looking element can be wrong if the seal sits at a different depth.
What is the biggest fitment trap with the Case IH Farmall 25A 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.
Why does the Case IH Farmall 25A horsepower class matter for filters?
With a 24.6 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 250-hour guide.
How do I avoid mixing up Case IH Farmall 25A outer and safety filters?
Multiple numbers usually means a staged air cleaner. Replace the loaded outer element first, then inspect the safety element without exposing the clean intake to dust.
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.
