TM 5-3805-258-24-1
OPERATOR’S STATION
INDIVIDUAL ClRCUIT DESCRIPTION
C. Parking Brake (Transmission in Neutral)
The parking brake circuit has a normally open 9G8009 Pressure Switch in
the air line to the parking brakes. When the pressure in the air line to release the
parking brakes is over approximately 517 kPa (75 psi), the switch is closed and
the parking brake indicator on the operator panel is OFF. If the air pressure
goes below approximately 448 kPa (65 psi), because of an application of the
parking brake or because of a loss of system pressure, the switch opens and the
indicator on the operator panel turns ON. The circuit connects to Pin 19 of the
operator panel.
SYSTEMS OPERATION
P A R K I N G B R A K E S W I T CH
1. Parking brake “ON” switch.
P A R K I N G B R A K E I N D I C A T OR
2. Parking brake indicator.
Parking Brake Pressure Circuit
3-152
