Presser Foot Cam MB4

THIS CAM IS SCREWED ONTO THE MAIN FRONT BEARING OF THE MAIN TOP SHAFT OF THE JANOME MB4 MULTI-NEEDLE SEWING MACHINE.  THIS CAM MAY NEED REPLACED AFTER MANY MANY HOURS OF SEWING IF THERE IS A CLICKING NOISE WHEN PRESSER FOOT GOES UP AND DOWN AT HIGH SPEEDS.  THE CAM IS INEXPENSIVE, HOWEVER LABOR IS PRETTY INTENSIVE TO REPLACE THIS PROPERLY.  A SPECIAL BEARING PULLER IS NECESSARY TO REMOVE THE FRONT BEARING FROM THE CAM AND CRANK.