VALVE 1C4057 - Caterpillar

Illustration 1 g02065556
Pressure circuit for SWING RIGHT (partial schematic) (1) Passage (supply oil) (2) Makeup port (3) Relief valve (4) Passage (5) Motor rotary group (6) Swing motor (7) Passage (return oil) (8) Relief valve (9) Passage (10) Makeup line (11) Check valve (12) Port (supply oil) (13) Port (return oil) (14) Check valve (15) Check valve (16) Return line (17) Swing control valve (18) Slow return check valve (19) Return lineWhen the swing joystick is moved to the NEUTRAL position during the swing right operation, the swing control valve shifts to the NEUTRAL position. Since the swing control valve is in the NEUTRAL position, the oil delivery through port (12) to motor rotary group (5) is blocked at the swing control valve. The return oil from