When your MF 399’s dual-belt cooling system starts squealing or one belt breaks, you can’t just replace the damaged one and call it good. The matched pair design ensures balanced operation and even wear, and mixing an old belt with a new one is a recipe for rapid failure and potential overheating when you’re in the middle of harvest or spring planting.
What You’re Getting
- Two perfectly matched AVX13x1440 belts that work as a team on your A6.354.4 engine
- Heavy-duty construction that handles the demands of serious agricultural horsepower
- Proper 1440mm length for exact tension when both belts are correctly adjusted
- Direct replacement for dual-belt configuration – no guesswork or modifications needed
Built for Real Farm Work
The 2680 uses a turbo-charged Perkins 6.354-4 engine producing 126hp, and your 399 with the same A6.354.4 powerplant represents serious agricultural muscle. Whether you’re powering through heavy tillage, running demanding PTO equipment, or handling large-scale operations, this dual-belt setup distributes the cooling and alternator loads that keep your engine running at proper temperature under stress.
Made to Last
These belts feature identical construction that’s critical for dual-belt applications. The wrapped construction resists edge fraying and the high-temperature compounds handle the heat your hardworking A6.354.4 generates. Oil-resistant materials survive inevitable farm contamination, while matched manufacturing tolerances ensure both belts share loads equally throughout their service life.
Good to Know
Always replace both belts together – never run one new with one worn. Check pulley alignment with a straightedge since misalignment destroys belts quickly in dual systems. Tension both belts identically using a proper gauge, then run the engine briefly and recheck tension as belts seat. Mark them during installation to track wear patterns – uneven wear tells you there’s a pulley or alignment issue that needs attention.
