Travel System
The travel system utilizes seven major components in the machine hydraulic system to provide machine travel. The seven major components are the following:
- Four bi-directional travel motors
- The main hydraulic pumps which supply oil for travel motor operation
- Four control valve spools in the lower main control valve, which control the flow of oil to the travel motors from the main hydraulic pumps
- Travel propel solenoid valves, used for controlling machine movement forward and rearward
- The pilot manifold, which contains the travel displacement solenoid valve and the park brake solenoid valve
- The swivel, which is the rotating connection for all travel system hydraulic oil lines and electrical lines between the rotating upper structure "carbody" and the stationary lower structure
- The oscillating axle solenoid valves which control oil in the oscillating axle cylinders
Note: Refer to the appropriate sections in this manual for more information.
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| Illustration 1 | g03342854 |
Top view of MH3049 (1) Travel pedal (2) Final drive (3) Travel motor (4) Swivel (5) Hydraulic oil tank (6) Oscillating cylinder (7) Main control valve (lower) (8) Manifold and valve (load sensing, travel) (9) Flow diverter valves (optimal steering) (10) Control manifold and solenoid (park brake, travel speed) (11) Control manifold and solenoid (lower hydraulic shutoff) (12) Main hydraulic pumps (13) Case drain filter for lower components | |
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| Illustration 2 | g03342856 |
Right side view of MH3049 (1) Travel pedal (2) Final drive (4) Swivel (5) Hydraulic oil tank (6) Oscillating cylinder (7) Main control valve (lower) (8) Manifold and valve (load sensing, travel) (9) Flow diverter valves (optimal steering) (10) Control manifold and solenoid (park brake, travel speed) (11) Control manifold and solenoid (lower hydraulic shutoff) (12) Main hydraulic pumps (13) Case drain filter for lower components | |