The Case IH STX500 tractor primary air filter part number is 123456. The inner safety filter is 222429A1.
Case IH STX500 Air Filter Details
| Primary air filter part number | 123456 |
|---|---|
| Inner safety air filter part number | 222429A1 |
| Outer air filter part number | 222429A1 |
| 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 STX500 Extra Air Filter Notes
| Engine model | QSX 15 |
|---|---|
| Engine horsepower | 500 hp | 373 kW |
| Primary filter note | For the Case IH STX500, the listed primary air filter part number is 123456. 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 222429A1. |
| Safety filter note | The listed inner safety air filter is 222429A1. 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 | The important combo is power plus element size. That tells you whether restriction is a real working problem or mainly a fit/seal problem. |
| 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 STX500 Air Filter FAQs
Why should I compare the old Case IH STX500 filter before buying?
The safest match is not just the printed number. Use 123456, then check whether the element seats fully without forcing the cover.
What does the Case IH STX500 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.
Is the Case IH STX500 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 222429A1 when you meant the safety filter, or 222429A1 when you meant the outer filter.
Can I match a Case IH STX500 air filter by size?
This looks like a large and deep element. Use the dimensions to reject obvious bad cross-references, especially if the inner diameter or seal lip does not match the removed element.
Would I be strict with the Case IH STX500 air filter condition?
Yes. The power-to-filter-size relationship makes restriction and seal condition worth taking seriously. Replace a questionable element before heavy dusty work.
What is the biggest fitment trap with the Case IH STX500 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 full Case IH STX500 air-filter number matter?
Multiple numbers are useful only if each one is tied to the correct element position. Wrong element in the right brand is still wrong.
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.
