PIPE 4W3945 - Caterpillar

Illustration 1 g03384759
Schematic for the hydraulic system (1) Main control valve (2) Line relief valve for rod end of tilt cylinder (3) Line relief valve for head end of tilt cylinder (4) Pressure tap for rod end of tilt cylinder (5) Tilt cylinder (6) Lift cylinder (7) Ride control accumulator (8) Pressure tap for head end of tilt cylinder (9) Ride control diverter valve (10) Front wheel brakes (11) Lift circuit relief valve (12) Ride control relief valve (13) Ride control solenoid valve (14) Brake release cylinder (15) Pressure tap for the brake release system (16) Brake release sequence valve (17) Main relief valve (18) Line to STIC steering pilot valve (19) Implement and steering solenoid valve (20) Parking brake control valve (21) Seat swivel gear motor (22) Lift arm positioner valve (23) Parking brake oil pressure switch (24) Shuttle valve (25) Shuttle valve (26) Pilot control valve (27) Parking brake oil pressure sensor (28) Seat brake (29) Float sequence valve (30) Shuttle valve (31) Line from steering circuit (32) Service brake and transmission neutralizer pedal (33) Residual brake oil pressure switch (34) Service brake oil pressure switch (35) Residual brake oil pressure switch (36) Directional solenoid valve (37) Check valve (38) Pressure tap for the parking brake circuit (39) Control solenoid valve (40) Brake accumulator oil pressure switch - alert indicator (41) Brake accumulator oil pressure switch - brake application (42) Brake accumulator (43) Check valve (44) Service brake control valve (45) Screen (46) Seat swivel control valve (47) Pilot relief valve (48) Check valve (49) Pilot oil filter (50) Brake accumulator relief valve (51) Pressure tap for the brake accumulator circuit (52) Brake accumulator charging valve (53) Breaker relief valve (54) Pressure tap for the pilot system (55) Portable hydraulic pump quick connect coupler (56) Rear wheel brakes (57) Pilot and braking pump (58) Steering pump (59) Implement pump (60) Hydraulic filters (61) Hydraulic tank (62) Check valve (63) Portable hydraulic pump quick connect couplerThe main components of the pilot operated swivel seat are: seat swivel gear motor (21), seat swivel control valve (46) and seat brake (28).