HARNESS AS 7Y5508 - Caterpillar

Illustration 1 g00525183
(1) Generator (2) Generator auxiliary attachment circuit (3) Line relief and makeup valve (4) Priority attachment circuit (5) Main control valve (6) Shock reducing valve (7) Flow limiter valve (8) Generator control valve (9) Priority control valve (10) Compensator valve (11) Pre-selector generator control valve (Auxiliary) (12) Pilot manifold (13) Tank (14) Pre-selector priority control valve (Auxiliary)Note: Refer to Operation and Maintenance Manual, "Implement and Swing Control" for operating your machine with different attachments. Refer to System Operation, "Pilot Control System", System Operation, "Main Control Valve" or any of the other reference material inside this manual.Generator Priority Circuit
Illustration 2 g00525242
Generator (1) is a gear feed pump that provides a constant flow of oil to generator auxiliary attachment circuit (2). Generator (1) also produces the required voltage for a magnet.Priority attachment circuit (4) regulates the main pump oil through the valve. The priority attachment circuit combines some load sensing pressure to compensator valve (10) which meters oil flow. Priority valves are used for implements that operate at a different oil pressure. However, the implements maintain a constant pressure to the prioritized implement.
Illustration 3 g00525181
Flow priority switch (15) and generator switch (16) provides current to the joystick. After flow priority switch (15) and generator switch (16) are in the ON position, the joystick can operate pre-selector generator control valve (11) or pre-selector priority control valve (14) .With flow priority switch (15) in the OFF, the main pump pressure controls the prioritized implement.Magnet Control (If Equipped)
Illustration 4 g00296242
To turn on the magnet, press down the rear button on the right joystick.
Illustration 5 g00296243
Press the rear button that is located on the left joystick in order to turn off the magnet.When the magnet is turned on, pilot oil will flow out of pilot manifold (12). This will help to overcome the spring pressure at generator control valve (8) .Spring centering keeps generator control valve (8) in a neutral position. Pilot pressure moves generator control valve (8) downward. Now, the pump pressure will move compensator valve (10) upward in order to increase the oil flow to the primary consumer.A prioritized implement requires different oil pressure from the other implements. While more than one implement is activated the highest load pressure is directed through internal passages to the spring chamber at the top of all flow compensator valves.