The Case IH D35 tractor primary air filter part number is PA2539. The inner safety filter is 187472A1.
Case IH D35 Air Filter Details
| Primary air filter part number | PA2539 |
|---|---|
| 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 compact tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
Case IH D35 Extra Air Filter Notes
| Engine model | Shibaura 1.7L |
|---|---|
| Engine displacement | 1.7 L | 103.7 cu in |
| Engine horsepower | 35 hp | 26.1 kW |
| Primary filter note | For the Case IH D35, the listed primary air filter part number is PA2539. 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 | For a smaller tractor, the filter may not look dramatic, but dirt ingestion is still the killer. Dry mowing, loader work and chaff are bigger triggers than engine hours alone. |
| 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 D35 Air Filter FAQs
What is the most reliable way to confirm a Case IH D35 air filter?
If the old filter is missing, use PA2539 plus the housing measurements as a two-step check. If either the seal or cover depth is wrong, do not run it.
Which Case IH D35 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.
Why does airflow matter on the Case IH D35 air filter?
For a smaller tractor, the filter may not look dramatic, but dirt ingestion is still the killer. Dry mowing, loader work and chaff are bigger triggers than engine hours alone.
What does the Case IH D35 air-filter part-number pattern tell me?
Multiple numbers are useful only if each one is tied to the correct element position. Wrong element in the right brand is still wrong.
Why are there multiple air filter numbers for the Case IH D35?
The outer filter is the dirt-catcher; the inner filter is the backup. Service them with different expectations instead of replacing both out of habit.
Can I clean the Case IH D35 inner safety filter?
No. The inner safety element is backup protection, not the part to disturb every time. Leave it seated while the outer element is out so dust cannot fall into the intake.
Can the same Case IH D35 use different air filters?
The engine specs explain service urgency, while the filter number proves fitment. Mixing those two up is how people order the wrong element.
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.
