The Case IH 743 XL tractor primary air filter part number is 185168R9. The inner safety filter is 5107416.
Case IH 743 XL Air Filter Details
Primary air filter part number
185168R9
Inner safety air filter part number
5107416
Outer air filter part number
381423R92
Air filter dimensions
Length: 10.9 in | Outside diameter: 6.1 in | Inside diameter: 3.8 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
Length
10.9 in
Outside diameter
6.1 in
Inside diameter
3.8 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 743 XL Extra Air Filter Notes
Engine displacement
3.9 L | 238 cu in
Engine horsepower
67 hp | 50 kW
Primary filter note
For the Case IH 743 XL, the listed primary air filter part number is 185168R9. 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 5107416. Do not remove the safety element for normal cleaning; replace it if dirty, damaged or oil-soaked.
Fitment note
Listed dimensions: Length: 10.9 in | Outside diameter: 6.1 in | Inside diameter: 3.8 in. Use dimensions as a second check, not as the only buying method.
Filter size note
The listed dimensions point to a mid-size element length at 10.9 in and normal outside diameter at 6.1 in. Use that as a fitment sanity check against the old filter.
Power range note
The important combo is power plus element size. That tells you whether restriction is a real working problem or mainly a fit/seal problem.
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 743 XL Air Filter FAQs
Why should I compare the old Case IH 743 XL filter before buying?
Use 185168R9 as the anchor number, then verify the old element and housing label. This is a mixed letter-and-number part number, and the setup looks like a primary, outer and inner safety element setup, so one loose search result is not enough. The size data points to a mid-size element, so compare the removed element against both length and outside diameter before fitting.
Why compare Case IH 743 XL horsepower with filter dimensions?
Comparing power and element size helps catch bad cross-references. A tiny replacement for a harder-working engine should make you suspicious before installing it.
What should I buy for a full Case IH 743 XL air-filter service?
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 5107416 when you meant the outer filter.
Can I match a Case IH 743 XL air filter by size?
This looks like a mid-size element. Use the dimensions to reject obvious bad cross-references, especially if the inner diameter or seal lip does not match the removed element.
Why does the full Case IH 743 XL air-filter number matter?
The primary number format is a mixed letter-and-number part number, while the page also has separate companion numbers. That is exactly where copy-paste ordering mistakes happen.
Why not stretch a dirty Case IH 743 XL air filter under load?
The important combo is power plus element size. That tells you whether restriction is a real working problem or mainly a fit/seal problem.
Should I buy separate outer and primary filters for a Case IH 743 XL?
The presence of both outer and inner numbers means you should order carefully. A kit can be convenient, but only if it contains the correct service element and safety element.
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.
