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| Illustration 1 | g03258199 |
Example of a front travel motor and final drive (1) Port for park brake | |
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| Illustration 2 | g03342008 |
Control manifold and solenoid (park brake, travel speed) (2) Park brake solenoid (3) Ports for the park brake hydraulic lines | |
Park brake hydraulic lines are connected to ports (3), which are labeled "BR".
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| Illustration 3 | g03342016 |
Partial schematic showing the park brake solenoid and one travel motor (shown with brake released) (2) Park brake solenoid (3) Ports for park brake hydraulic lines (4) Spring brake (5) Relief valve (6) Park brake pressure sensor | |
When there is a request to disengage the parking brake, the IQAN system sends a signal to park brake solenoid (2). This action will send pilot oil to spring brake (4) hydraulically releasing the spring pressure at each final drive.
Park brake pressure sensor (6) sends an electrical signal to Lower controller 1. Lower controller 1 will monitor the pressure of the park brake system.