Some things to look at after repairing several brands of hay mowers for customers. Some brands have a wear clutch under each turtle and some don't. Easier to pull just that turtle and related parts to replace. Some brands have separate oil compartments under each turtle versus the whole bar being one complete oil compartment. The ones with separate compartments, if you have a bearing failure, contain the failure to that compartment instead of contaminating the whole cutter bar. Way easier to clean and rebuild if their separate. Just rebuilt a Case mower conditioner for a guy. Had to replace half the bearings and gears in the cutter bar because the routine spring maintenance wasn't done. 5000 dollars later it was fixed. Can't stress it enough. Do the spring maintenance even if your late into the field!!! You'll thank yourself later.