The Case IH STX330 tractor primary air filter part number is STX330. The inner safety filter is 187472A1.
Case IH STX330 Air Filter Details
| Primary air filter part number | STX330 |
|---|---|
| Inner safety air filter part number | 187472A1 |
| Outer air filter part number | 932391C2 |
| Air filter dimensions | Outside diameter: 9.9 in | Inside diameter: 6 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 STX330 Extra Air Filter Notes
| Engine horsepower | 330 hp | 246.1 kW |
|---|---|
| Primary filter note | For the Case IH STX330, the listed primary air filter part number is STX330. 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 932391C2. |
| Safety filter note | The listed inner safety air filter is 187472A1. 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. 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 STX330 Air Filter FAQs
Is the Case IH STX330 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 932391C2 when you meant the safety filter, or 187472A1 when you meant the outer filter.
How should I verify the Case IH STX330 air filter before fitting it?
The buying order should be: old filter number first, housing fit second, then cross-reference. Start with STX330, but do not ignore the a primary, outer and inner safety element setup. Use the listed dimension as a sanity check, but still verify the seal and end-cap style.
What do the Case IH STX330 air filter dimensions tell me?
The listed outside diameter helps, but it is incomplete. Do not buy purely from that value unless the old element also matches.
What does the outer-filter listing mean for the Case IH STX330?
This looks like a multi-element setup. Keep the outer/primary service element and the inner safety element separate when ordering, because mixing up 932391C2 and 187472A1 is the easy mistake.
What is the biggest fitment trap with the Case IH STX330 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.
Can a similar Case IH STX330 air-filter number still be wrong?
The part-number pattern can help spot junk listings. If a seller’s number looks nothing like the catalog style, verify it against a real drawing.
Can a dirty air filter affect Case IH STX330 performance?
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.
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.
