The New Holland T9.390 tractor primary air filter part number is 86555826. The inner safety filter is 87408704.
New Holland T9.390 Air Filter Details
Primary air filter part number
86555826
Inner safety air filter part number
87408704
Outer air filter part number
87300178
Air filter dimensions
Length: 15.5 in | Outside diameter: 7.5 in | Inside diameter: 4.5 in
Air Filter Service Interval Guide
Air Filter Service Interval Guide
Dusty use
100 hrs
Average
500 hrs
Light use
1,000 hrs
Listed Filter Size Check
Length
15.5 in
Outside diameter
7.5 in
Inside diameter
4.5 in
These are practical inspection/replacement guide ranges for the large ag tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
New Holland T9.390 Extra Air Filter Notes
Engine model
FPT 8.9L
Engine displacement
8.9 L | 543.1 cu in
Engine horsepower
390 hp
Primary filter note
For the New Holland T9.390, the listed primary air filter part number is 86555826. 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 87300178.
Safety filter note
The listed inner safety air filter is 87408704. Do not remove the safety element for normal cleaning; replace it if dirty, damaged or oil-soaked.
Fitment note
Listed dimensions: Length: 15.5 in | Outside diameter: 7.5 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 long element length at 15.5 in and normal outside diameter at 7.5 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
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.
New Holland T9.390 Air Filter FAQs
What should I check before ordering a New Holland T9.390 air filter?
Use 86555826 as the anchor number, then verify the old element and housing label. This is a straight numeric OEM-style 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 long element, so compare the removed element against both length and outside diameter before fitting.
Why compare New Holland T9.390 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.
Should I order one filter or a full New Holland T9.390 air-filter set?
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 87300178 when you meant the safety filter, or 87408704 when you meant the outer filter.
Which New Holland T9.390 air-filter measurement matters most?
This looks like a long element. Use the dimensions to reject obvious bad cross-references, especially if the inner diameter or seal lip does not match the removed element.
Would I be strict with the New Holland T9.390 air filter condition?
Yes. The power-to-filter-size relationship makes restriction and seal condition worth taking seriously. Replace a questionable element before heavy dusty work.
Can I ignore letters or suffixes in the New Holland T9.390 filter number?
The main number 86555826 should be treated as the control number. The other numbers need their own fitment checks, not blind substitution.
What symptoms point to air restriction on a New Holland T9.390?
The important combo is power plus element size. That tells you whether restriction is a real working problem or mainly a fit/seal problem.
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 newholland.com website before ordering or installing an air filter.
