M318F, M320F and M322F Wheeled Excavators Hydraulic System Caterpillar


General Information (Machine System)

Usage:

M320F F2W
The implement systems and travel system use a load sensing system that controls the operation of the implements and travel motor. The main pump and medium pressure pilot pump are mounted to the engine and provide the oil for the systems.

The swing pump is a closed loop hydraulic system that uses a piston pump that is mounted the rear of the main pump. The swing pump provides oil for operation of the swing motor.

The travel system uses a mechanical drive that includes a transmission and axles. The transmission is driven by a hydraulic travel motor.

The machines hydraulic system is controlled by the monitor, multiple ECMs, and various operator controls.



Illustration 1g03700238
Top view of machine
(1) Stabilizer cylinders
(2) Stick lowering control valve
(3) Stick cylinder
(4) Bucket cylinder diverter valves
(5) Bucket cylinder
(6) Work tool manual valves
(7) Stabilizer shutoff valve
(8) Oscillating axle lock cylinders
(9) Steering cylinder
(10) Brake and final drive
(11) Boom lowering control valves
(12) Ride control accumulators
(13) Hydraulic oil cooler
(14) Fan motor
(15) Boom cylinders
(16) Fore boom cylinder
(17) Swivel
(18) Swing drive
(19) Fan hydraulic pump
(20) Swing motor
(21) Anti drift valve
(22) Main control valve
(23) Main hydraulic pump
(24) Swing pump
(25) Swing charge filter
(26) Medium pressure pilot pump
(27) Return filter
(28) Blade cylinders
(29) Hydraulic oil tank
(30) Transmission
(31) Blade shutoff valve
(32) Quick coupler control valve
(33) Control valve for joystick steering
(34) Diagnostic test ports
(35) Smart boom control valve
(36) Travel motor
(37) Joystick pattern change valve
(38) Medium pressure control valve
(39) Pilot manifold
(40) Ride control solenoid valve
(41) Brake system accumulators
(42) Auto-brake valve
(43) Stabilizer and blade control lever
(44) Steering priority valve
(45) Joystick controls
(46) Pilot oil filter
(47) Brake valve
(48) Work tool pedal
(49) Fore boom pedal
(50) Steering valve
(51) Brake pedal
(52) Travel pedal


Illustration 2g03700240
Right side view of machine
(1) Stabilizer cylinders
(3) Stick cylinder
(4) Bucket cylinder diverter valves
(5) Bucket cylinder
(6) Work tool manual valves
(7) Stabilizer shutoff valve
(8) Oscillating axle lock cylinders
(9) Steering cylinder
(10) Brake and final drive
(13) Hydraulic oil cooler
(14) Fan motor
(15) Boom cylinders
(16) Fore boom cylinder
(17) Swivel
(18) Swing drive
(19) Fan hydraulic pump
(20) Swing motor
(21) Anti drift valve
(22) Main control valve
(23) Main hydraulic pump
(24) Swing pump
(25) Swing charge filter
(26) Medium pressure pilot pump
(27) Return filter
(28) Blade cylinders
(29) Hydraulic oil tank
(30) Transmission
(32) Quick coupler control valve
(33) Control valve for joystick steering
(34) Diagnostic test ports
(35) Smart boom control valve
(36) Travel motor
(38) Medium pressure control valve
(39) Pilot manifold
(41) Brake system accumulators
(42) Auto-brake valve
(45) Joystick controls
(50) Steering valve
(52) Travel pedal

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