TM 9-2330-390-14&P2-2. CONTROLS AND INDICATORS (Con't).BRAKE SYSTEMKeyControl or Indicator3Airbrake Control KnobFunctionApplies or releases front and rear dolly service brakes whenemergency air line is disconnected from towing vehicle.4Parking Brake LeverApplies and releases parking brakes on rear dolly.(Rear Dolly)5Air Reservoir DraincockReleases compressed air and drains condensation andcontaminants from each air reservoir.2-3
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