SERV1851 02/08
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Text Reference Travel System
LEFT TRAVEL MOTOR SLOW SPEED
Two Speed Travel Switch
Actuator Parking Brake
Displacement Change Valve
Brake Pilot Valve
Two Speed Travel Solenoid Valve Crossover Relief Valves
Machine ECM
Pilot Pump
Counterbalance Valve
>
167
Travel System Operation When the operator selects the low speed mode, the Machine ECM will not energize the two speed travel solenoid valve. The displacement change valve does not shift. Some of the supply oil to the motors is sent by the displacement change valve to the actuator piston on the left and drains the passage to the actuator on the right. The motor swashplate is moved to the maximum angle.
