SHAFT AS 5Y0134 - Caterpillar

Medium Pressure Circuit
The medium pressure circuit is an option. The medium pressure circuit is used for rotating a tool or swivelling a tool. The medium pressure circuit is used during use of the double action hydraulic attachment circuit. The working pressure for the medium pressure circuit is 2000 kPa (290 psi).
Illustration 1 g00416519
Medium Pressure (Side View) (1) Auxiliary pump (2) Line from hydraulic tank (3) Line to medium pressure solenoid valve (4) Return line to hydraulic tank (5) Medium pressure solenoid valve (6) Pressure solenoid (7) Pressure switch (8) Front linesThe medium pressure circuit is activated by a switch on the left implement control lever in the cab. The auxiliary hydraulic controller activates pressure solenoid (6) . Oil is drawn by pump (1) from the hydraulic tank through line (2) . The hydraulic oil is supplied to medium pressure solenoid valve (5) through line (3) . Front lines (8) connect with the hydraulic lines which control the movement of the tool. Oil returns from the tool through front lines (8) . Oil returns to the hydraulic tank through return line (4) .The pressure switch (7) signals the main controller when the medium pressure circuit is active. The main controller assigns a percentage of max power to the medium pressure circuit. The flow to the other implements should not be affected. The main controller maintains constant power control to the other implements.