HARNESS ASSEMBLY-FRONT 1748661 - Caterpillar

Illustration 1 g00671568
Hydraulic schematic (1) Stick cylinder (2) Line (3) Line (4) Stick lowering control valve (5) Relief valve (6) Pilot valve (7) Check valve (8) Line (9) Pilot line (10) Pilot line (11) Pilot line (12) Valve (13) Stick drift reduction valve (14) Main control valve (15) Line (16) Passage (17) Passage (18) Passage (19) Return passage (20) Passage (21) Center bypass passage (22) Control valve (stick II) (23) Passage (24) Control valve (stick I) (25) Parallel feeder passage (26) Check valve (27) Pilot line (28) Pilot line (29) Center bypass passage (30) Check valve (31) Drain line (32) Shuttle valve (33) Solenoid valve (fine control) (34) Pilot line (35) Shuttle valve (36) Pilot line (37) Pilot control valve (38) Pilot line (39) Pilot line (40) Upper pump (41) Return line (42) Lower pump (43) Pilot pumpStick Control
Introduction
Illustration 2 g00671806
Main control valve (22) Control valve (stick II) (24) Control valve (stick I)
Illustration 3 g00671807
Main control valve (lower view) (13) Drift reduction valve (stick)When the stick is moved to the STICK IN position or the STICK OUT position, control valve (22) is used. Control valve (24) is used in conjunction with control valve (22) when the stick is moved to the STICK OUT position. When control valve (22) and control valve (24) are activated, oil flow from upper pump (40) and from lower pump (42) flows to stick cylinder (1) .Stick drift reduction valve (13) is located in the circuit between main control valve (14) and stick cylinder (1). When all control levers are in the NEUTRAL position, stick drift reduction valve (13) stops oil leakage from the rod end of the stick cylinder. Stopping oil leakage prevents stick drift. The stick drift reduction valve also contains a relief valve that controls the pressure in the rod end of the stick cylinder.Stick lowering control valve (4) is located on the