TM-9-2320-272-10
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; OPERATOR'S MANUAL
SEPTEMBER 2004
CHANGE 2
TM-9-2320-272-10 - Page 77 of 481
TM 9-2320-272-10
1-60
1-20. COMPRESSED AIR AND BRAKE SYSTEM OPERATION (Contd)
(2)
The constant air pressure supply is distributed to the primary service
airbrake system (para e.) and secondary airbrake system (para c.) through a shutoff
and check valve. Air pressure can either be fed from or supplied to another vehicle
through the emergency couplings.
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