PIPE-EXHAUST 1165240 - Caterpillar

Illustration 1 g06213523
Main control valve
(1) Stick drift reduction valve
Illustration 2 g06243701
Stick drift reduction valve
(2) Passage to head end of stick cylinder
(4) Stick cylinder
(7) Spool
(9) Passage
(11) Spring
(13) Drift reduction valve
(14) Passage to rod end of stick cylinder
(15) PassageStick Out
Illustration 3 g06214783
Stick drift reduction valve (STICK OUT)
(2) Passage to head end of stick cylinder
(3) Passage from stick cylinder retract solenoid
(4) Stick cylinder
(5) Passage from stick 1 control valve
(6) Drain passage
(7) Spool
(8) Passage from stick cylinder extend solenoid for drift reduction spool shift
(9) Passage
(10) Passage
(11) Spring
(12) Spring chamber
(13) Drift reduction valve
(14) Passage to rod end of stick cylinder
(15) Passage
(16) Passage from stick 2 control valve
(17) Passage from stick cylinder extend solenoid for stick control valveWhen the joystick is moved to the STICK out position, pilot oil is not sent from the pilot manifold to passage (8) of stick drift reduction valve (1). Spool (7) does not shift.The oil flow from the stick 2 control valve in passage (16) and stick 1 control valve in passage (5) combines in the main control valve at the boom drift reduction valve passage (15). As the oil pressure in passage (15) increases, valve (13) shifts against the force of spring (11). The oil in spring chamber (12) flows through passages (10) and (9) to passage (15). The oil in passage (15) now flows to the rod end of the stick cylinder through passage (14).Stick In
Illustration 4 g06279218
Stick drift reduction valve (STICK IN)
(2) Passage to head end of stick cylinder
(3) Passage from stick cylinder retract solenoid
(4) Stick cylinder
(5) Passage from stick 1 control valve
(6) Drain passage
(7) Spool
(8) Passage from stick cylinder extend solenoid for drift reduction spool shift
(9) Passage
(10) Passage
(11) Spring
(12) Spring chamber
(13) Drift reduction valve
(14) Passage to rod end of stick cylinder
(15) Passage
(16) Passage from stick 2 control valve
(17) Passage from stick cylinder extend solenoid for stick control valveWhen the joystick is moved to the STICK IN position, pilot oil is sent from the pilot manifold to passage (8) of stick drift reduction valve (1). Spool (7) shifts. The oil in spring chamber (12) flows through passage (10), the orifice in spool (7), and drain line (6) to the hydraulic tank.The return oil from the stick cylinder rod end enters port (14). Since the pressure in spring chamber (12) is low, the oil in passage (14) shifts valve (13) against the force of spring (11). The oil from the rod end of the stick cylinders flows through passage (15), and passage (5) to the stick 1 control valve.