The Case IH D45 tractor primary air filter part number is PA2684FN. The inner safety filter is 187472A1.
Case IH D45 Air Filter Details
| Primary air filter part number | PA2684FN |
|---|---|
| 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 utility tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
Case IH D45 Extra Air Filter Notes
| Engine model | Shibaura 2.2L |
|---|---|
| Engine displacement | 2.2 L | 134.3 cu in |
| Engine horsepower | 45 hp | 33.6 kW |
| Primary filter note | For the Case IH D45, the listed primary air filter part number is PA2684FN. 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 | This sits in the utility range. The 300-hour guide is useful for planning, but dusty work should shorten the inspection cycle. |
| Engine airflow note | Engine size is useful context for service urgency, not a license to ignore the part number. The canister and seal decide fitment. |
| 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 D45 Air Filter FAQs
Why should I compare the old Case IH D45 filter before buying?
If the old filter is missing, use PA2684FN plus the housing measurements as a two-step check. If either the seal or cover depth is wrong, do not run it.
How do I avoid mixing up the Case IH D45 air-filter elements?
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.
Does engine power change how I service the Case IH D45 air filter?
This sits in the utility range. The 300-hour guide is useful for planning, but dusty work should shorten the inspection cycle.
Why does the full Case IH D45 air-filter number matter?
When there are several part numbers, do not search them all in one cart and hope. Label each one as primary, outer or safety before buying.
What does the outer-filter listing mean for the Case IH D45?
This is not a one-number job. The outer and inner elements have different jobs, so compare both old parts before buying a kit.
Does engine size prove the Case IH D45 air-filter part number?
Engine size is useful context for service urgency, not a license to ignore the part number. The canister and seal decide fitment.
Should I blow out the Case IH D45 inner safety element?
Replace the safety element when it is contaminated, damaged, wet or due by the book. Blowing it out as a normal habit is a dumb way to push dirt toward the engine.
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.
