The Case IH Farmall 105N tractor primary air filter part number is 381423R92. The inner safety filter is 3651225M91.
Case IH Farmall 105N Air Filter Details
Primary air filter part number
381423R92
Inner safety air filter part number
3651225M91
Outer air filter part number
Same as primary air filter
Air Filter Service Interval Guide
Air Filter Service Interval Guide
Dusty use
100 hrs
Average
400 hrs
Light use
800 hrs
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 Farmall 105N Extra Air Filter Notes
Engine model
FPT 4.5L
Engine displacement
4.5 L | 274.6 cu in
Engine horsepower
106 hp | 79 kW
Primary filter note
For the Case IH Farmall 105N, the listed primary air filter part number is 381423R92. 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 Farmall 105N appears to be the same listed item as the primary filter.
Safety filter note
The listed inner safety air filter is 3651225M91. 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
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 Farmall 105N Air Filter FAQs
Is the Case IH Farmall 105N 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.
What is the most reliable way to confirm a Case IH Farmall 105N air filter?
If the old filter is missing, use 381423R92 plus the housing measurements as a two-step check. If either the seal or cover depth is wrong, do not run it.
What does the Case IH Farmall 105N air-filter part-number pattern tell me?
Part numbers are not keywords to approximate. One missing suffix can send you to a related filter that does not seal correctly.
What does the outer-filter listing mean for the Case IH Farmall 105N?
In this listing, the outer and primary filter appear to be the same service element. That means the main outer element is the one you replace first while the inner safety element stays protected.
When does the Case IH Farmall 105N air filter become a performance problem?
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 the Case IH Farmall 105N safety filter stay seated?
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.
How useful is displacement for a Case IH Farmall 105N air-filter match?
Engine size is useful context for service urgency, not a license to ignore the part number. The canister and seal decide fitment.
Official information note
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.
