The Case IH 9240 tractor primary air filter part number is A171255. The inner safety filter is A44804.
Case IH 9240 Air Filter Details
| Primary air filter part number | A171255 |
|---|---|
| Inner safety air filter part number | A44804 |
| Outer air filter part number | Same as primary air filter |
| Air filter dimensions | Outside diameter: 9.9 in | Inside diameter: 6 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 large ag tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
Case IH 9240 Extra Air Filter Notes
| Engine displacement | 8.3 L | 506.5 cu in |
|---|---|
| Engine horsepower | 235 hp | 175.2 kW |
| Primary filter note | For the Case IH 9240, the listed primary air filter part number is A171255. Match the number before buying because air cleaner setups can vary by engine, serial range and market. |
| Outer filter note | The outer air filter for the Case IH 9240 appears to be the same listed item as the primary filter. |
| 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 | Inside diameter: 6 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 | Airflow demand rises with load. If the filter is undersized, damaged or badly seated, the engine can lose pull before the element looks completely plugged. |
| Engine airflow note | A similar horsepower rating does not guarantee the same filter if displacement or engine family changes. Use the engine data as a sanity check only. |
| 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 9240 Air Filter FAQs
What makes the Case IH 9240 air-filter number risky to order blindly?
The safest match is not just the printed number. Use A171255, then check whether the element seats fully without forcing the cover. The outer listing matching the primary means you probably do not need to buy two different outer elements.
Is the Case IH 9240 air filter a one-part or multi-part service?
For normal service, the primary/outer element is the one that does the dirty work. The inner safety element is backup protection, so replace it less often and keep it seated while cleaning the housing.
Why compare Case IH 9240 horsepower with filter dimensions?
Comparing power and element size helps catch bad cross-references. A tiny replacement for a harder-working engine should make you suspicious before installing it.
Are the Case IH 9240 air filter dimensions enough to buy from?
Because the element has listed length, OD and ID, measure the old filter the same way. Do not compare one seller’s overall height to another seller’s gasket-to-gasket length without checking the drawing.
Can a dirty air filter affect Case IH 9240 performance?
Airflow demand rises with load. If the filter is undersized, damaged or badly seated, the engine can lose pull before the element looks completely plugged.
Why is the exact Case IH 9240 filter number important?
Use the full A171255 string. Do not trim suffixes or ignore letters; small part-number changes can mean a different seal or element length.
What is the biggest fitment trap with the Case IH 9240 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.
