FRAME AS-LH 4682930 - Caterpillar

Illustration 1 g02670789
Electrohydraulic system schematic
(1) Hydraulic oil cooler
(18) Implement pump
(19) Hydraulic oil filter
(30) Bank valve
(39) Implement lift and tilt control
(40) Blade angle thumb wheel
(41) Increment/Power pitch extend switch
(42) Decrement/Power pitch retract switch
(43) Blade Shake & Auto/Manual switch
(44) Implement lockout switch
(45) Stable blade switch
(47) Machine ECM
(52) Diverter valve
Illustration 2 g02670796
Electrohydraulic system schematic
(1) Hydraulic oil cooler
(15) Hydraulic block
(29) Pilot solenoid valve
(30) Bank valve
(31) Line relief valve
(32) Main relief valve
(33) Makeup check valve
(34) Load sensing valve
(35) Drift reduction valve
(36) Hydraulic tank The implement hydraulic system is a load sensing system that controls the operation of the bulldozer blade and the operation of the ripper or winch (if equipped). A gear pump that is mounted to the engine timing gear housing provides the high-pressure oil for the system. The charge pump of the front piston pump provides the pilot oil for the operation of the bank valve. The implement hydraulic system is controlled by the machine ECM, implement ECM, and various operator controls.Refer to Troubleshooting, KENR5648, "Connector Contact Description" for pin descriptions on electrohydraulic schematics.