RING-RETAINING 1852888 - Caterpillar

Illustration 3 g01183121
(7) Pressure switch
Illustration 4 g01183231
(8) Indicator for the stabilizerPressure switches (7) are installed in the stabilizer cylinders. When the cylinders are extended and the stabilizers are supporting a predefined weight, the contacts in the pressure switches will close and indicator (8) on the dash panel will illuminate.
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(9) Switch (fully retracted boom)Switch (9) for the boom retract is installed on the front left side of the fixed boom section. The switch sends a signal to the machine ECM in order to inhibit the function for raising the stabilizer when the boom is extended. This function is available only if the machine ECM is equipped with a feature to inhibit lateral stability.The following text describes the procedure to operate the right stabilizer. The procedure for operating the left stabilizer is the same procedure as operating the right stabilizer.Stabilizer Cylinders (HOLD)
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Hydraulic Schematic for the stabilizers (HOLD) (11) Check valve (12) Lock valve (13) Right stabilizer cylinder (14) Pressure switch for the right stabilizer (15) Lock valve (16) Check valve (17) Load control valve gp (18) Load control valve for the left stabilizer (19) Load control valve for the right stabilizer (20) Valve group (stabilizer control) (21) Flow control valve (22) Pump pressure (23) Return to tankUntil the dash panel switch is depressed, the solenoid in flow control valve (21) is de-energized. The spring in flow control valve (21) causes the spool in flow control valve (21) to move to the left. The supply of pilot oil is now blocked. Spool (19) is spring centered to the HOLD position. In HOLD position, supply oil from the pump is blocked by the closed center of the spool. Check valve (11) and check valve (16) in load control valve (17) is seated. This blocks oil in the head end and the rod end of stabilizer cylinder (12). Oil is also blocked in the rod end of the stabilizer cylinder by the valve stem in lock valve (12). The spring in the lock valve (12) overcomes the pressure of the blocked oil from the rod end of the cylinder. The spool shifts to the left and the oil is blocked at the lock valve.The pressure sensor (14) for stabilizer (13) signals the ECM when the stabilizer is under load.Stabilizer Cylinders (RAISE)
Illustration 7 g01184186
Hydraulic Schematic for the right stabilizer (RAISE) (11) Check valve (12) Lock valve (13) Right stabilizer cylinder (14) Pressure switch for the right stabilizer (15) Lock valve (16) Check valve (17) Load control valve gp (18) Load control valve for the left stabilizer (19) Load control valve for the right stabilizer (20) Valve group (stabilizer control) (21) Flow control valve (22) Pump pressure (23) Return to tankNote: When the right stabilizer is raised the right side of the machine will be lowered to the ground and the stabilizer cylinder will retract.To raise the right stabilizer cylinder, press right stabilizer switch (6) on the dash panel to the left. The switch energizes the solenoid for the load control valve for the right stabilizer