L O C A T I O N O F T H E C O N T R O L K N OB

AIR CIRCUIT FOR THE EMERGENCY AND PARKING BRAKE

QUICK RELEASE VALVE FOR EMERGENCY AND PARKING BRAKE

TM-5-3805-258-24-1 Loader Scoop Type DED 4x4 Articulated Frame Steer 2 1/2 Cubic Yard Bucket (CCE) Airborne/Airmobile Manual
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A I R S Y S T E M A N D B R A K E S A I R C I R C U I T F O R T H E E M E R G E N CY A N D P A R K I N G B R A K E TM 5-3805-258-24-1 S Y S T E M S O P E R A T I O N WARNING L O C A T I O N O F T H E C O N T R O L K N OB 2. Knob. If the knob moves back out immediately after it is pushed in, the pressure in the air system is not enough to release the parking brake. Do not move the machine until the air pressure is at the correct pressure for operation. Operation of the machine with the parking brake engaged will destroy the brake and cause a fire. Air from the reservoir goes through orifice (8) and outlet port (7) to the parking brake. The pressure in port (7) will hold valve (9) against cover (10) which closes exhaust port (11). The parking brake is now released. When the brake air pressure indicator goes off and the fault alarm stops (operating pressure is reached), When knob (2) is pulled out again, the pressure in the operator must push in and hold knob (2) (move outlet port (7) will release through exhaust port (11). knob to OFF position) to release the parking brake. The parking brake is again activated. The control valve for the emergency and parking brake will activate automatically when the pressure of the air system goes below approximately 280 kPa (40 psi). At this pressure, spring (5) moves valve (9) in an up position against valve body (4) and the parking brake is activated. When the control knob is moved to the ON position, the transmission is auto- matically disengaged. AIR PRESSURE SWITCH FOR EMERGENCY AND PARKING BRAKE L O C A T I O N O F T H E A I R P R E S S U R E S W I T CH 1. Switch. Air pressure switch (1) is activated when the air pressure to the parking brake gets below approxi- mately 450 kPa (65 psi). The switch causes the parking brake indicator in the dash to come ON. C O M P O N E N T S O F T H E C O N T R O L V A L V E 3. Plunger. 4. Valve body. 5. Spring. 6. Inlet port from air Switch (1) is fastened to the quick release valve r e s e r v o i r . 7 . O u t l e t p o r t t o e m e r g e n c y a n d p a r k i n g of the brake chamber for the emergency and park- brake. 8. Orifice. 9. Valve. 10. Cover. 11. Exhaust port to ing brake. open air. 3-75

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