The Massey Ferguson 9S.370 tractor primary air filter part number is 3703703M91. The inner safety filter is 3703704M91.
Massey Ferguson 9S.370 Air Filter Details
Primary air filter part number
3703703M91
Inner safety air filter part number
3703704M91
Outer air filter part number
2127378K1
Air Filter Service Interval Guide
Air Filter Service Interval Guide
Dusty use
100 hrs
Average
500 hrs
Light use
1,000 hrs
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.
Massey Ferguson 9S.370 Extra Air Filter Notes
Engine displacement
8.4 L | 512.6 cu in
Engine horsepower
370 hp
Primary filter note
For the Massey Ferguson 9S.370, the listed primary air filter part number is 3703703M91. 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 2127378K1.
Safety filter note
The listed inner safety air filter is 3703704M91. 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
This is a higher-airflow class, so restriction matters fast. If it is working in dust, inspect before the 500-hour planning mark instead of waiting for visible power loss.
Engine airflow note
Displacement and horsepower together explain airflow demand better than either one alone, but the air-cleaner housing still proves fit.
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.
Massey Ferguson 9S.370 Air Filter FAQs
How do I avoid mixing up the Massey Ferguson 9S.370 air-filter elements?
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 2127378K1 when you meant the safety filter, or 3703704M91 when you meant the outer filter.
What should I check before ordering a Massey Ferguson 9S.370 air filter?
The buying order should be: old filter number first, housing fit second, then cross-reference. Start with 3703703M91, but do not ignore the a primary, outer and inner safety element setup.
Why are there multiple air filter numbers for the Massey Ferguson 9S.370?
The outer filter is the dirt-catcher; the inner filter is the backup. Service them with different expectations instead of replacing both out of habit.
Can the Massey Ferguson 9S.370 lose power from a dirty air filter?
This is a higher-airflow class, so restriction matters fast. If it is working in dust, inspect before the 500-hour planning mark instead of waiting for visible power loss.
Can I ignore letters or suffixes in the Massey Ferguson 9S.370 filter number?
Multiple numbers are useful only if each one is tied to the correct element position. Wrong element in the right brand is still wrong.
How useful is displacement for a Massey Ferguson 9S.370 air-filter match?
Displacement and horsepower together explain airflow demand better than either one alone, but the air-cleaner housing still proves fit.
How does engine data help with a Massey Ferguson 9S.370 air-filter check?
If the tractor has had an engine swap, ignore generic model-name fitment until you compare the housing and old 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 masseyferguson.com website before ordering or installing an air filter.
