LINK GP-STEERING 3108145 - Caterpillar

Hydraulic Schematic for the Travel System
Illustration 1 g01953316
(1) Left travel motor (2) Right travel motor (3) Swivel (4) Drain from travel motors (5) Pilot oil for two-speed valves on travel motors (6) Left travel control valve (7) Right travel control valve (8) Main control valve (9) Oil that is supplied to the main control valve (10) Drive pump (11) Idler pump (12) Pilot pump (13) Auxiliary pump (14) Right travel control lever (15) Left travel control lever (16) Oil supply from hydraulic tank (17) Solenoid for two speedLeft travel motor (1) is supplied with oil from drive pump (10). Right travel motor (2) is supplied with oil from the idler pump (11). The oil is directed through the main control valve (8) and the swivel (3).
Illustration 2 g01165340
Travel motor (1) Left travel motor (18) Counterbalance valve
Illustration 3 g01165341
Travel drive (19) Left track (20) Sprocket (21) Left travel driveOil is supplied to left travel motor (1) by drive pump (10) through the swivel. Oil is supplied to right travel motor (2) by idler pump (11) through the swivel. When the drive pump supplies hydraulic oil to the left travel motor, the motor rotates and the motor torque is transferred to final drive (21). The final drive reduces the output speed of the travel motor and the final drive increases the output torque of the travel motor. Final drive (21) transfers the increased torque to left track (19) through sprocket (20).
Illustration 4 g01165342
Cab floor (22) Two-speed travel pedalThe travel speed can be controlled through fine movements of the travel levers/pedals. The travel speed can also be set to LOW SPEED or HIGH SPEED through the use of the two-speed travel pedal (22). The machine will travel at LOW SPEED until the operator steps on the pedal. The machine will then move into HIGH SPEED mode. The HIGH SPEED mode is recommended for travel on a flat surface. During gradual downhill travel, the mode may be set to HIGH SPEED for high mobility.
Illustration 5 g01165345
Travel operation (1) Left travel motor (2) Right travel motor (14) Right travel control lever (15) Left travel control lever (22) Two-speed travel pedal (23) Forward direction (24) Reverse direction (25) IdlerThe direction of machine movement is determined by the direction of the machine's lower structure. For normal operation, the idlers (25) are toward the front of the machine and travel motors (1) and (2) are toward the rear of the machine. When the machine is arranged for normal travel and control levers (14) and (15) are pushed forward, the machine moves forward. The machine travels backward when the control levers are pulled backward. If the upper structure is turned 180 degrees, the operating directions for the travel levers are reversed.When the machine is in the normal travel position and when one of the travel levers/pedals is moved forward, the respective track travels forward. The machine turns because the stationary track acts as the pivot point. This type of turn is called a pivot turn.The machine will perform a spot turn