TM 9-2320-273-20
CHAPTER 2
PRINCIPLES OF OPERATION
2-1. OVERVIEW.
This chapter explains the functioning of chassis components you will be maintaining at the Organiza-
tional level, and how these components relate to each other. The explanation is broken down into the
following sections:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
n.
o.
p.
q.
r.
s.
t.
u.
v.
w.
x.
y.
z.
aa.
bb.
Truck/Tractor Chassis (para 2-2 thru 2-5).
Engine (para 2-6, 2-7).
Engine Controls (para 2-8 thru 2-10).
Transmission and Controls (para 2-11, 2-12).
Power Transfer Case and Rear Axle Differential Lockup (para 2-13, 2-14).
Pusher Axle and Controls (para 2-15, 2-16).
Front Axle and Suspension (para 2-17 thru 2-19).
Rear Axle (para 2-20 thru 2-22).
Fuel and Air Intake System (para 2-23 thru 2-25).
Engine Oil System (para 2-26 thru 2-28).
Exhaust System (para 2-29, 2-30).
Cooling System (para 2-31 thru 2-33).
Relays, Circuit Breakers, and Wire Identification (para 2-34 thru 2-36).
Starting and Starting Control System (para 2-37, 2-38).
Ether Quick-Start (para 2-39, 2-40).
Batteries and Power Generating System (para 2-41, 2-42).
Service Lighting System (para 2-43 thru 2-49).
Blackout Lighting System (para 2-50, 2-51).
Instrumentation (para 2-52).
Electric Horn (para 2-53, 2-54).
Cab Heating and Ventilating Systems (para 2-55 thru 2-58).
Compressed Air System (para 2-59, 2-60).
Brake System (para 2-61 thru 2-70).
Auxiliary Air-Powered Systems (para 2-71 thru 2-74).
Steering System (para 2-75, 2-76).
Power Takeoff (para 2-77, 2-78).
Winch (para 2-79, 2-80).
Winterization Kit (para 2-81, 2-82).
2-1
