SERVICE GP-MONITOR 2690837 - Caterpillar

Illustration 1 g00723167
Operator Control Console (1) Propel control lever (2) Parking brake (3) Automatic speed controlModulation of the oil flow from the propel pump to the two hydraulic motors is controlled by propel control lever (1) and automatic speed control (3). Oil from the charge pump circuit is used for the hydraulic control functions.Note: The automatic speed control is an option for the CB-534C.
Illustration 2 g00723173
Schematic For The Automatic Speed Control and The Propel Control Lever (1) Propel control lever (3) Rotary selector (4) Forward control valve (5) Reverse control valve (6) Orifice for the speed control (7) Shuttle valve (8) Orifice for the speed control (9) Block for the automatic speed control (10) Tank return line (11) Charge pressure line from the steering pump (12) Outlet line for the port (13) Outlet portOil enters the block for the automatic speed control through line (11) from the brake and shift valve. The oil flows through the block for the automatic speed control (9) into the propel control lever (1). When the propel control lever (1) is in NEUTRAL, the control oil is blocked at forward control valve (4) and reverse control valve (5). The forward movement or the reverse movement of the propel control lever (1) allows the charge pressure oil to flow through one of the two valves.Forward control valve (4) and reverse control valve (5) reduce the inlet pressure in line (11). The reduced pressure is proportional to the movement of the propel control lever (1).