As the title says, I have pulled a couple of these clutches off these mowers but I haven't replaced one This mower hit a pipe and has damaged something. When the motor is running and the blades are not rotating and you open the rear flap the blades are vibrating up and down. I haven't put a dial indicator on the blade carrier but I have rotated it slowly and it looks ok. Has anybody replaced one of these clutches and if so how difficult was it? I know pulling them off it seems quite complicated