COOLING GP-SUPPLEMENTAL 3899491 - Caterpillar

Stick Out
Illustration 1 g03696307
Hydraulic schematic for STICK OUT
(1) Main control valve
(2) Return passage
(3) Stick cylinder
(4) Line
(5) Line
(6) Line relief valve (stick cylinder rod end)
(7) Line relief valve (stick cylinder head end)
(8) Pilot line
(9) Stick control valve
(10) Passage
(11) Passage
(12) Pilot line
(13) Passage
(14) Passage
(15) Parallel feeder passage
(16) Line
(17) Pressure switch (main pump)
(18) Main pump
(19) Hydraulic tank
(20) Pilot Manifold
(21) Return line
(22) Line
(23) Pilot control valve
(24) Hydraulic lockout switch During a STICK OUT operation, the oil delivery from main pump (18) flows through line (16) to parallel feeder passage (15) in main control valve (1). Oil flows to stick control valve (9).Main pump (18) supplies oil to pilot manifold (20). Pilot manifold (20) supplies oil to pilot control valve (23) and through line (22). When the joystick for the stick is moved to the full STICK OUT position, the pilot oil flows from pilot control valve (23) through pilot line (12). The pilot oil flows to stick control valve (9).The pilot oil flow shifts stick control valve (9) for STICK OUT operation. The oil delivery in parallel feeder passage (15) flows through passage (14), passage (13), passage (11), and through stick control valve (9). The oil delivery from main pump (18) then flows through line (4) to the rod end of stick cylinder (3).Return oil from the head end of stick cylinder (3) flows through line (5) to stick control valve (9). The oil then flows through passage (10), return passage (2), return line (21), and back to hydraulic tank (19).Stick In
Illustration 2 g03696308
Hydraulic schematic for STICK IN
(1) Main control valve
(2) Return passage
(3) Stick cylinder
(4) Line
(5) Line
(6) Line relief valve (stick cylinder rod end)
(7) Line relief valve (stick cylinder head end)
(8) Pilot line
(9) Stick control valve
(10) Passage
(11) Passage
(12) Pilot line
(13) Passage
(14) Passage
(15) Parallel feeder passage
(16) Line
(17) Pressure switch (main pump)
(18) Main pump
(19) Hydraulic tank
(20) Pilot Manifold
(21) Return line
(22) Line
(23) Pilot control valve
(24) Hydraulic lockout switch During a STICK IN operation, the oil delivery from main pump (18) flows through line (16) to parallel feeder passage (15) in main control valve (1). Oil flows to stick control valve (9).Main pump (18) supplies oil to the pilot manifold (20). Pilot manifold (20) provides oil to pilot control valve (23) and through line (22). When the joystick for the stick is moved to the full STICK IN position, the pilot oil flows from pilot control valve (23) through pilot line (8). The pilot oil flows to stick control valve (9).The pilot oil flow shifts stick control valve (9) for STICK IN operation. The oil delivery from main pump (18) in parallel feeder passage (15) flows through passage (14), passage (13), passage (11), and through stick control valve (9). The oil delivery from main pump (18) then flows through line (5) to the head end of stick cylinder (3).Return oil from the rod end of stick cylinder (3) flows through line (4) to stick control valve (9). The oil then flows through passage (10), return passage (2), return line (21) and back to hydraulic tank (19).