Sharpening twine knives / other questions

Sounds like you have the same problem that I have with my 14T baler. I have much better luck with the 9000' or 7200' twine. My baler also leaves the knot on the bill hook always the left side, about every 20-30 bales. Last year it was worse for a while and out of frustration, I switched the twine coming from the rolls to the other needles (left roll to right needle and right to left) - it worked much better after that which leads me to believe that it is somehow related to twine tension, although changing the tension doesn't seem to make any difference.
Another thing that helps is to put the twine rolls in the #2 and #4 (counting from left), position in the baler twine box. The twine seems to feed better from those positions.
This spring, I was working on the knotters and took the wiper arm out of the assembly and noticed that the brass ball at the end of the wiper arm was frozen and had a small flat spot on it. I freed it up and lubricated well. So far this year, it seems better but I will have to bale more to see if it helps. I do not think that sharpening the knife will solve your problem since the problem is the knot is not wiped off the bill hook, but the string is cut OK.

Good luck.

Your baler would have been designed for 9000 sisal. Many times 9000 plastic can work if that's what you want, but can be fussier with plastic. Try a bale of the 9000 sisal & see how it works.

--->Paul