DRUM ASSEM. 5D2209 - Caterpillar

Illustration 4 g00990720
Main Control Valve (1) Main control valve. (40) Auxiliary control lever. (41) Tilt control lever. (42) Lift control lever.When pilot oil is sent to an end cap of main control valve (1) the stem is shifted and the pump supply oil is directed to the appropriate implement cylinder. Valve stems (13), (15), and (17) control the flow of oil to auxiliary cylinders (2), tilt cylinder (3), and lift cylinder (4). The valve stems are controlled by pilot pressure oil from the pilot control valve.Tilt stem (15) has three positions: TILT BACK position, HOLD position and DUMP position. When tilt stem (15) moves to the TILT BACK position, pump supply oil flows through the tilt valve (40) to the head end of the tilt cylinder. Oil from the rod end of the tilt cylinder flows through tilt valve (41) back to the hydraulic oil tank.When the tilt lever is in the HOLD position, all of the oil flow returns to hydraulic tank (34). When tilt stem (15) moves to the DUMP position, high