1) The Upper and Lower Cutter may be adjusted up and down and right to left. The standard setting would have them adjusted so that the fabric going into the stitch will be trimmed to the width of the Chaining Finger on the Needle Plate.
2) The Lower Cutter Holder slides in the L.C.H. Support Assembly allowing right to left (lateral) movement of the Lower Cutter. Some Lower Cutter Holders have an internal spring to maintain pressure between the Upper and Lower Cutter. In some cases you may wish to fix the position of the Lower Cutter; to do this, tighten the screw 85 3/16 at the desired position. Make sure you are only applying light pressure against the Upper Cutter.
3) The U.C.C. Thrust Block supports the force against the Upper Cutter Carrier by the cutters. After extended service it may be necessary to adjust this block by means of Adjusting Screw 81 3/16 and the clamp screw 55 3/16. There should be about 1 thousandth of an inch of clearance between the Thrust Block and the Upper Cutter Carrier.