The Case IH Maxxum 120 tractor primary air filter part number is 420539A1. The inner safety filter is 87682992.
Case IH Maxxum 120 Air Filter Details
Primary air filter part number
420539A1
Inner safety air filter part number
87682992
Outer air filter part number
82034614
Air filter dimensions
Length: 12 in | Outside diameter: 8.5 in | Inside diameter: 4.5 in
Air Filter Service Interval Guide
Air Filter Service Interval Guide
Dusty use
100 hrs
Average
400 hrs
Light use
800 hrs
Listed Filter Size Check
Length
12 in
Outside diameter
8.5 in
Inside diameter
4.5 in
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 Maxxum 120 Extra Air Filter Notes
Engine model
FPT 4.5L
Engine displacement
4.5 L | 274.6 cu in
Engine horsepower
120 hp
Primary filter note
For the Case IH Maxxum 120, the listed primary air filter part number is 420539A1. 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 82034614.
Safety filter note
The listed inner safety air filter is 87682992. Do not remove the safety element for normal cleaning; replace it if dirty, damaged or oil-soaked.
Fitment note
Listed dimensions: Length: 12 in | Outside diameter: 8.5 in | Inside diameter: 4.5 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 12 in and large outside diameter at 8.5 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
The displacement helps identify the engine family; horsepower tells you how hard it breathes under load. The element still has to match the canister.
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 Maxxum 120 Air Filter FAQs
Is airflow likely to be sensitive on the Case IH Maxxum 120?
If the tractor is under load, a marginal or dirty element will matter more than it does at idle. Use the size/power combo as a reason to inspect before heavy dusty jobs.
What should I buy for a full Case IH Maxxum 120 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 82034614 when you meant the safety filter, or 87682992 when you meant the outer filter.
How do I avoid buying the wrong Case IH Maxxum 120 air filter?
Because this listing shows a primary, outer and inner safety element setup, the risk is ordering one correct number and one wrong companion element. Keep 420539A1 as the main reference, then confirm the other elements separately.
How should I use the Case IH Maxxum 120 filter dimensions?
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.
How can part-number style help check a Case IH Maxxum 120 filter?
When there are several part numbers, do not search them all in one cart and hope. Label each one as primary, outer or safety before buying.
What does the outer-filter listing mean for the Case IH Maxxum 120?
This is not a one-number job. The outer and inner elements have different jobs, so compare both old parts before buying a kit.
What is the biggest fitment trap with the Case IH Maxxum 120 air filter?
The trap is assuming a wide element is close enough because it looks right online. The seal face, end-cap depth and cover pressure have to match, otherwise dust can bypass the media.
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.
