The Case IH 4240 tractor primary air filter part number is 84386403. The inner safety filter is 187472A1.
Case IH 4240 Air Filter Details
| Primary air filter part number | 84386403 |
|---|---|
| Inner safety air filter part number | 187472A1 |
| Outer air filter part number | 381423R92 |
Air Filter Service Interval Guide
Air Filter Service Interval Guide
These are practical inspection/replacement guide ranges for the row-crop tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
Case IH 4240 Extra Air Filter Notes
| Engine displacement | 4.4 L | 268.5 cu in |
|---|---|
| Engine horsepower | 104 hp | 77.6 kW |
| Primary filter note | For the Case IH 4240, the listed primary air filter part number is 84386403. 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 187472A1. Do not remove the safety element for normal cleaning; replace it if dirty, damaged or oil-soaked. |
| Fitment note | Check the old filter, air cleaner housing label and parts book before ordering if the tractor has had an engine or intake-housing change. |
| Power range note | At this power level, a dirty filter can show up as weaker pull, smoke or higher heat under load. Use job conditions and the restriction indicator ahead of a fixed schedule. |
| Engine airflow note | Displacement and horsepower together explain airflow demand better than either one alone, but the air-cleaner housing still proves fit. |
| 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 4240 Air Filter FAQs
Which Case IH 4240 air-filter parts should be changed together?
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 187472A1 when you meant the outer filter.
What would make a Case IH 4240 air filter cross-listing suspicious?
Use 84386403 as the anchor number, then verify the old element and housing label. This is a straight numeric OEM-style number, and the setup looks like a primary, outer and inner safety element setup, so one loose search result is not enough.
How should I read the Case IH 4240 air-filter number?
The primary number format is a straight numeric OEM-style number, while the page also has separate companion numbers. That is exactly where copy-paste ordering mistakes happen.
What does the outer-filter listing mean for the Case IH 4240?
This is not a one-number job. The outer and inner elements have different jobs, so compare both old parts before buying a kit.
Why does the Case IH 4240 horsepower class matter for filters?
At this power level, a dirty filter can show up as weaker pull, smoke or higher heat under load. Use job conditions and the restriction indicator ahead of a fixed schedule.
Why should I check the engine before ordering a Case IH 4240 air filter?
Engine family matters because intake housings are not always shared across every version of a model. Confirm the canister, not just the tractor name.
Can similar engines use different Case IH 4240 air filters?
Displacement and horsepower together explain airflow demand better than either one alone, but the air-cleaner housing still proves fit.
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.
