The New Holland Workmaster 25S tractor primary air filter part number is MT40049450. The inner safety filter is SBA314531174.
New Holland Workmaster 25S Air Filter Details
Primary air filter part number
MT40049450
Inner safety air filter part number
SBA314531174
Outer air filter part number
Same as primary air filter
Air Filter Service Interval Guide
Air Filter Service Interval Guide
Dusty use
100 hrs
Average
250 hrs
Light use
500 hrs
These are practical inspection/replacement guide ranges for the compact tractor category. Dusty work can shorten the interval heavily, so use the restriction indicator and operator manual first.
New Holland Workmaster 25S Extra Air Filter Notes
Engine model
Yanmar 3TNV80F
Engine horsepower
24.7 hp | 18.4 kW
Primary filter note
For the New Holland Workmaster 25S, the listed primary air filter part number is MT40049450. 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 New Holland Workmaster 25S appears to be the same listed item as the primary filter.
Safety filter note
The listed inner safety air filter is SBA314531174. 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
For a smaller tractor, the filter may not look dramatic, but dirt ingestion is still the killer. Dry mowing, loader work and chaff are bigger triggers than engine hours alone.
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 Workmaster 25S Air Filter FAQs
Is the New Holland Workmaster 25S air filter a one-part or multi-part 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 New Holland Workmaster 25S air filter?
If the old filter is missing, use MT40049450 plus the housing measurements as a two-step check. If either the seal or cover depth is wrong, do not run it.
Can I ignore letters or suffixes in the New Holland Workmaster 25S filter number?
Part numbers are not keywords to approximate. One missing suffix can send you to a related filter that does not seal correctly.
When does the New Holland Workmaster 25S air filter become a performance problem?
For a smaller tractor, the filter may not look dramatic, but dirt ingestion is still the killer. Dry mowing, loader work and chaff are bigger triggers than engine hours alone.
How do the New Holland Workmaster 25S outer and primary filters differ?
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 clean the New Holland Workmaster 25S inner safety filter?
No. The inner safety element is backup protection, not the part to disturb every time. Leave it seated while the outer element is out so dust cannot fall into the intake.
How does engine data help with a New Holland Workmaster 25S air-filter check?
The engine info narrows the search, but serial range and market version can still change the air-cleaner setup.
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.
