CONTROL GP-SERVICE BRAKE 5490059 - Caterpillar

Travel Hydraulic System
The travel hydraulic system utilizes seven major components in the machine hydraulic system to provide machine travel, which includes:
Two bi-directional, two-speed travel motors, which propel the final drives and the attached track sprockets
The main hydraulic pumps, which supply oil for travel motor operation
Three control valve spools in the main control valve, which control the flow of oil to the travel motors from the main hydraulic pumps
Two pilot valves, which are connected to the operator controls, for controlling machine movement forward, rearward, and turning
The pilot manifold, which enables the distribution of pilot oil for operation of the pilot operated travel levers/pedals
The control manifold, which contains the two-speed travel solenoid valve
The swivel, which is the rotating connection for all travel system hydraulic oil lines between the rotating upper structure (carbody) and the stationary lower structure.Other components of the travel system include:
Straight travel solenoid
Left and Right travel pressure switches
Two-speed travel solenoidNote: Refer to the appropriate sections in this manual for more information.