I recently bought an older 1209 9ft MoCo. I have been trying to troubleshoot why the knife bar keeps breaking at the cup that holds the Pin. I just noticed that the Pitman arm (knife drive arm) doesn't match the serial number of the mower. Does anyone know if changing the arm and knife assembly to the newer model (higher serial number) would cause the knife to break.
I have replaced the wear plates and confirmed that the knife can move back and forth freely. When I look at the break it suggests that it was fatigued in the front to back direction, not up and down.
I have replaced the wear plates and confirmed that the knife can move back and forth freely. When I look at the break it suggests that it was fatigued in the front to back direction, not up and down.