The Massey Ferguson 5S.135 tractor primary air filter part number is 1886638M91. The inner safety filter is 4379575M1.
Massey Ferguson 5S.135 Air Filter Details
Primary air filter part number
1886638M91
Inner safety air filter part number
4379575M1
Outer air filter part number
1032762M91
Air filter dimensions
Length: 9.4 in | Outside diameter: 4.1 in | Inside diameter: 0.4 in
Cross-reference part numbers
1029945M92
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
9.4 in
Outside diameter
4.1 in
Inside diameter
0.4 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.
Massey Ferguson 5S.135 Extra Air Filter Notes
Engine displacement
4.4 L | 268.5 cu in
Engine horsepower
135 hp | 100.7 kW
Primary filter note
For the Massey Ferguson 5S.135, the listed primary air filter part number is 1886638M91. 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 1032762M91.
Safety filter note
The listed inner safety air filter is 4379575M1. Do not remove the safety element for normal cleaning; replace it if dirty, damaged or oil-soaked.
Fitment note
Listed dimensions: Length: 9.4 in | Outside diameter: 4.1 in | Inside diameter: 0.4 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 9.4 in and normal outside diameter at 4.1 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
The displacement helps identify the engine family; horsepower tells you how hard it breathes under load. The element still has to match the canister.
Cross-reference note
Possible cross-reference numbers found for the Massey Ferguson 5S.135: 1029945M92. Treat these as secondary checks after the primary filter number.
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 5S.135 Air Filter FAQs
What makes the Massey Ferguson 5S.135 air-filter number risky to order blindly?
If the old filter is missing, use 1886638M91 plus the housing measurements as a two-step check. If either the seal or cover depth is wrong, do not run it.
Why compare Massey Ferguson 5S.135 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.
Which Massey Ferguson 5S.135 air-filter parts should be changed together?
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 1032762M91 when you meant the safety filter, or 4379575M1 when you meant the outer filter.
Which Massey Ferguson 5S.135 air-filter measurement matters most?
The dimensions are useful only as a fitment screen. The final test is whether the element seats square, the cover closes normally and the seal lands where the old one did.
Would I be strict with the Massey Ferguson 5S.135 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 the Massey Ferguson 5S.135 lose power from a dirty air filter?
The important combo is power plus element size. That tells you whether restriction is a real working problem or mainly a fit/seal problem.
How do I sanity-check a Massey Ferguson 5S.135 aftermarket air filter?
Treat the alternate number as a lead beside 1886638M91. If the gasket, end cap or canister depth differs, walk away.
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.
