Don’t neglect to re-seal the gearbox with RTV right after you have discovered the 
correct combination. Even even though they are called “gaskets”, they will not likely seal your gearbox on their possess.
If every thing seems regular, try modifying the equipment-mesh. This is done with the mylar “gaskets” that sit in between the primary gearbox case and the enter/output caps. Consider introducing or taking away some of these spacers right up until your gears have around one/eight”-1/four” of free of charge enjoy. Pros can get replacements ($one-2) in various thicknesses, but we suggest the quick and filthy strategy of cutting your very own out of a sheet of mylar.
“Groaning”, “creaking”, or “popping” all audio kind-of equivalent over-the-cellphone. The best thing to do is to disassemble your gearbox and take a appear at the gears and bearings. The issue will typically present by itself in the way of damaged/lacking equipment teeth, toasted gears (like that photograph on our residence webpage), or blown bearings.
My Gearbox is Groaning/Creaking:
Fortunate for you, we did a create-up on our blog. It really is called “How to alter the enter shaft on your rotary cutter gearbox”.
Even more info regarding rotary cutter gearbox can be seen at https://www.ever-power.net/product/agricultural-gearbox-for-rotary-cutter/