Description
When you’re running a big John Deere combine through heavy crops or pushing your 8000 series tractor hard through tough field conditions, the last thing you need is cooling system trouble. A worn radiator cap might seem like a small thing, but it’s what keeps your system pressurized so coolant stays liquid even when things get hot. This 15 PSI cap maintains the pressure that keeps your coolant from boiling over when you’re working these machines the way they’re meant to be worked.
What You’re Getting
- 15 PSI pressure rating that raises coolant boiling point by about 45 degrees, giving you the protection these high-horsepower machines need
- B-size fit with 2 11/16 inch outer diameter designed for your tractor’s specific radiator neck
- 3/4 inch deep reach that seats properly in the filler neck for a secure seal
- Heavy-duty construction that handles the vibration and temperature cycling of farm work
- Direct OE-type replacement that fits exactly like the original
Built for Heavy-Duty Farm Work
This cap is made for John Deere’s workhorses – the 7720 combine that’s been harvesting fields for decades, and the 8650, 8760, and 8820 tractors that handle the heavy lifting on farms everywhere. Whether you’re combining corn in October heat, deep ripping with the big 8-series, or running PTO equipment all day, these machines generate serious heat and need cooling systems that can keep up.
Made to Last
Farm equipment cooling systems work harder than anything on the road, dealing with dust, debris, temperature swings, and constant vibration. This cap features the same robust construction as the original, with a spring-loaded pressure valve that won’t stick or fail when you need it most. The seal materials resist the chemicals in modern coolant and stay flexible through countless heat cycles.
Installation Notes
Always let your engine cool completely before removing any radiator cap – even a 15 PSI system can cause serious burns. Check the radiator neck for corrosion or damage while you’ve got the old cap off, since a perfect cap can’t seal on a damaged surface. Thread the new cap on firmly but don’t over-tighten – the seal does the work, not the threads.
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