Not exactly sure - ok not really at all - but I wonder why the Toyota’s for the 45’s wouldn’t work on 25/40’s? Nolen @wngrog or JP @ClemsonCruiser might know. Anyhow, here’s what I put on my ‘63 45, can’t imagine they’re not available from Toyota. But I’m slowly losing my imagin(ation) anyhow 😂.
Well which one of the filter elements did you order? Could make a difference in horsepower. You’ll have to paint the valve cover the appropriate color to match that tractor’s OEM color 😝. I painted mine orange, for Kubota since they’re at least Japanese 😆.
(never heard of Cockshutt tractors 😂)
That looks like a later unit that has the element encapsulated in a complete assembly that fits in the air cleaner housing. How much later I don’t know but definitely an upgrade in design in that there’s the complete unit instead of individual parts components. And it looks like the housing...
Hopefully this isn’t too much noise, but here’s what was on my ‘64 F135. The top was modified at some point to accommodate a dual carb offenhauser setup (as well as the mount to allow a bit more space for the front carb). Only one I have so don’t know if there are different designs.
Inside...
I picked up kits from cruiserteq but dang looks like they’re out of stock
https://cruiserteq.com/carburetor-rebuild-kit-fits-e-4-1968-fj40-w-o-solenoid-carb60086-discontinued/
Maybe?
https://parts.lakelandtoyota.com/p/__/CARBURETOR-KIT/15902140/0421160086.html
or...