Section XI. MAINTENANCE OF PAPER CUTTER ASSEMBLY

TM 10-3610-203-14 (2) Lift ladder and remove ladder from wall. c. Installation. Install ladder as follows: (1) Position ladder against wall and lower into position. (2) Secure ladder with retaining strap. d. Repair. If ladder is to be repaired, the procedures are as follows: (1) Unbuckle retaining strap, and remove from wall. (See fig. 4-11.) (2) Remove dents on ladder steps. (3) Remove dents on clamps or replace clamps as necessary. (4) Position ladder against wall, and secure with retaining strap. Section XI. MAINTENANCE OF PAPER CUTTER ASSEMBLY 4-24. General An Alton Iron Works Model 4906 guillotine-type papercutter is mounted on the rear end of the bench assembly. The cutter incorporates an electric motor which drives a hydraulic pump. The pump provides power for a hydraulic cylinder, the rod of which is attached, by means of a tie bar, to the knife bar assembly. When the two cutter operating switches are depressed, a solenoid valve is actuated, allowing pressurized fluid to pass to the cylinder. When the cylinder reaches the bottom of the power stroke, a lower limit switch is activated, deenergizing the solenoid valve, restricting fluid flow to the upper side of the piston. Fluid flow is then directed to the lower side of the cylinder piston, causing the cylinder rod to retract, bringing the knife to the topmost position. In this position, an upper limit switch is activated, in turn causing the solenoid valve to bypass fluid back to the pump reservoir. The papercutter assembly is shock mounted on two stiffening plates mounted on the bench top. (See fig. 4-12.) 4-29