The Case IH Farmall 55A tractor primary air filter part number is 381423R92. The inner safety filter is A44804.
Case IH Farmall 55A Air Filter Details
Primary air filter part number
381423R92
Inner safety air filter part number
A44804
Outer air filter part number
Same as primary air filter
Air filter dimensions
Outside diameter: 9.9 in | Inside diameter: 6 in | Height: 16.4 in
Air Filter Service Interval Guide
Air Filter Service Interval Guide
Dusty use
100 hrs
Average
300 hrs
Light use
600 hrs
Listed Filter Size Check
Height
16.4 in
Outside diameter
9.9 in
Inside diameter
6 in
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 Farmall 55A Extra Air Filter Notes
Engine displacement
2.2 L | 134.3 cu in
Engine horsepower
55 hp | 41 kW
Primary filter note
For the Case IH Farmall 55A, 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 55A appears to be the same listed item as the primary filter.
Safety filter note
The listed inner safety air filter is A44804. Do not remove the safety element for normal cleaning; replace it if dirty, damaged or oil-soaked.
Fitment note
Listed dimensions: Outside diameter: 9.9 in | Inside diameter: 6 in | 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 and large outside diameter at 9.9 in. Use that as a fitment sanity check against the old filter.
Power range note
A dirty filter on this setup can show up as reduced pull, black smoke or higher temperature. That is more useful than staring at the hour meter.
Engine airflow note
If a cross-reference is for a different displacement family, verify it hard before buying. Similar model names can hide different intake setups.
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 55A Air Filter FAQs
Does the Case IH Farmall 55A filter size look right for its horsepower?
The useful read is not the raw size by itself. Compared with the 55 hp engine class, the listed element size is generous for the power class, so fit/seal checks matter more than chasing a bigger filter. Use that to decide how cautious to be in dusty work.
What should I buy for a full Case IH Farmall 55A air-filter 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 should I check before ordering a Case IH Farmall 55A air filter?
The buying order should be: old filter number first, housing fit second, then cross-reference. Start with 381423R92, but do not ignore the a primary/outer service element plus an inner safety element. The size data points to a large and deep element, so compare the removed element against both length and outside diameter before fitting.
What do the Case IH Farmall 55A air filter dimensions tell me?
Length, OD and ID together are better than one size alone. The trap is buying a filter that fits into the canister but does not seal correctly at the ends.
What does the outer-filter listing mean for the Case IH Farmall 55A?
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 I ignore letters or suffixes in the Case IH Farmall 55A filter number?
If a listing shows a shortened version of 381423R92, be suspicious. Air filters are fitment parts, not close-enough parts.
Can a dirty air filter affect Case IH Farmall 55A performance?
A dirty filter on this setup can show up as reduced pull, black smoke or higher temperature. That is more useful than staring at the hour meter.
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.
