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 44 of 481
TM 9-2320-272-10
1-27
This section explains how components of the 5-ton M939/A1/A2 series vehicles work
together. A functional description of these components and their related parts will
be covered in the following paragraphs. To find the operation of a specific system or
component, see the principles of operation reference index below.
1-16. PRINCIPLES OF OPERATION REFERENCE INDEX
1-15. GENERAL
1-17
Control System Operation
1-27
1-18
Power System Operation
1-36
1-19
Electrical Systems Operation
1-47
1-20
Compressed Air and Brake System Operation
1-57
1-21
Hydraulic System Operation
1-73
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The control system includes those controls and their related parts that are
essential to the operation of the vehicle. These controls are common to all vehicles
with the exception of the transmission and transfer case power takeoff controls. All
originate from the cab. Each of these controls and their related parts will be
described as part of the following systems:
a.
Starting and Ether Starting System Operation (page 1-28).
b.
Accelerator Controls System Operation (page 1-30).
c.
Parking Brake System Operation (page 1-31).
d.
Steering System Operation (page 1-32).
e.
Transmission Control System Operation (page 1-33).
f.
Transfer Case Control System Operation (page 1-34).
1-17. CONTROL SYSTEM OPERATION (Contd)
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