The Case IH PJ55 tractor primary air filter part number is P637255. The inner safety filter is A189348.
Case IH PJ55 Air Filter Details
| Primary air filter part number | P637255 |
|---|---|
| Inner safety air filter part number | A189348 |
| Outer air filter part number | Same as primary air filter |
| Air filter dimensions | Height: 16.4 in |
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 PJ55 Extra Air Filter Notes
| Engine horsepower | 55 hp | 41 kW |
|---|---|
| Primary filter note | For the Case IH PJ55, the listed primary air filter part number is P637255. Match the number before buying because air cleaner setups can vary by engine, serial range and market. |
| Outer filter note | The outer air filter for the Case IH PJ55 appears to be the same listed item as the primary filter. |
| Safety filter note | The listed inner safety air filter is A189348. Do not remove the safety element for normal cleaning; replace it if dirty, damaged or oil-soaked. |
| Fitment note | Listed dimensions: 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. Use that as a fitment sanity check against the old filter. |
| 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. |
| 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 PJ55 Air Filter FAQs
Is the Case IH PJ55 air filter a one-part or multi-part service?
For normal service, the primary/outer element is the one that does the dirty work. The inner safety element is backup protection, so replace it less often and keep it seated while cleaning the housing.
How do I avoid buying the wrong Case IH PJ55 air filter?
The buying order should be: old filter number first, housing fit second, then cross-reference. Start with P637255, but do not ignore the a primary/outer service element plus an inner safety element. Use the listed dimension as a sanity check, but still verify the seal and end-cap style.
How should I use the Case IH PJ55 filter dimensions?
The listed length helps, but it is incomplete. Do not buy purely from that value unless the old element also matches.
Why does the Case IH PJ55 horsepower class matter for filters?
This sits in the utility range. The 300-hour guide is useful for planning, but dusty work should shorten the inspection cycle.
How can part-number style help check a Case IH PJ55 filter?
A clean part number is more useful than a generic model-name listing. Model-name compatibility tables are often the weak link.
What does the outer-filter listing mean for the Case IH PJ55?
If a seller tries to sell a separate outer element for this listing, compare it to the primary number first. It may just be duplicate naming.
Can a Case IH PJ55 engine swap change the air filter?
A 55 hp engine class needs clean airflow under load. That matters for service timing, but the old filter still decides what fits.
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.
