Location and Description of Major Components (cont)

TM 5-3610-286-20 (b) V-belt. The V-belt is connected between the main motor and flywheel. This mechanical link transmits torque from the main motor to printing press driving gears. (13) Transfer drum (13). Located below impression cylinder. Transfer drum (skeleton cylinder) aids smooth travel of sheets into delivery area. It is also the drive shaft and housing for chain sprockets which drive delivery grippers. (14) Feeder group (14). (a) Sheet smoother and accessories. Located on feeder tape table. Sheet smoother has brushes, roller wheels, and cage balls that control sheets as they travel down feeder tape table. (b) Static bar assembly. Static eliminator bar is located on feeder assembly over sheet pile. Power unit is located on drive side of printing press behind belt guard. (c) Universal joint shaft. Located between suction head and feeder D/S frame. Drive shaft for suction head. (d) Suction head assembly. Located at top of feeder. Supplies paper to forwarding assembly by lifting and forwarding sheets. (e) Sheet forwarding assembly. Located on top of feeder tape table. Receives sheets from suction head and starts forwarding sheets on feeder tape table. Driven by a chain and sprocket on drive side. (f) Double sheet detector mechanism. Located at top center of feeder tape table. Contains microswitch with two wheels connected by levers that stops forwarding sheets if more than one sheet is detected. (g) Magnetic clutch assembly. Located in feeder (D/S) frame. It is the feeder driving and braking unit. (h) Feeder pile lift motors. These motors, located on the feeder (D/S), drive chains which raise and lower the pile. Microswitches located directly over the chains limit feeder pile board height. The main pile lift motor, and its associated drive chain and control switch, is located further from the press. The auxiliary pile lift motor is located closer to the press. (15) Compressor (15). Located under footstep on drive side of printing press (delivery end). Supplies suction air to suction head and suction slowdown drum. Also supplies blower air to feeder and delivery areas. Some printing presses are equipped with an oil lubricated compressor (figure 1-4) and others are equipped with a dry (oilless) compressor. 1-11