MANIFOLD 1281600 - Caterpillar

Illustration 1 g01056035
(1) Pilot valve (2) Control lever (3) Plungers (4) Resolver block (5) Solenoid valve ( hydrostatic) The first pilot valve (1) controls the motion of the machine. The control lever (2) is moved to a desired position. The plungers (3) for the pilot valve are moved by the control lever. The plungers direct the oil flow to the resolver block (4). The resolver block directs the hydraulic oil to the actuator pistons for the piston pump ( hydrostatic). The solenoid valve ( hydrostatic) (5) is an interlock solenoid. The solenoid must be energized in order for oil to flow to the pilot valve. Refer to the Systems Operation, "General Information" for more information on the interlock system.
Illustration 2 g01056040
(6) Pilot valve (7) Control lever (8) Plungers (9) Solenoid valve ( work tool)The second pilot valve (6) controls the motion of the work tool. The control lever (7) is moved to a desired position. The plungers (8) for the pilot valve direct the pilot hydraulic oil to the respective spool in the control valve ( work tool). The work tool reacts accordingly. The solenoid valve ( work tool) (9) is an interlock solenoid. The solenoid must be energized in order for oil to flow to the pilot valve. Refer to the Systems Operation, "General Information" for more information on the interlock system.The control levers on both pilot valves are spring centered. When the levers are released from any position except for the FLOAT position, the levers will return to the NEUTRAL position. The FLOAT position has a detent that keeps the pilot valve for the work tool in the FLOAT position until you move the lever. Then, the pilot valve will return to the NEUTRAL position.Refer to the Operation and Maintenance Manual, "Operator Controls - Joystick Controls" for more information on the pilot operated hydraulic controls.