5-9. Papercutter Assembly
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, so 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 shockmounted on two stiffening
plates mounted on the bench top.
Removal Remove the papercutter as follows: (See fig. 5-16).
The papercutter weighs approximately 300 pounds (136 kilograms). Extreme care should be taken
in handling the machine to prevent injury to personnel and damage to other equipment in the
Disconnect papercutter electrical connector from equipment receptacle.
Open the rear bench cupboard doors and remove the four papercutter mounting bolts from the underside
of the bench top.