TM-9-2320-279-20-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3
TM-9-2320-279-20-1 - Page 36 of 985
TM 9-2320-279-20-1
Vehicle Operation Systems (Cont)
1-16. ENGINE SYSTEMS.
a. Air Intake System.
(fig. 1-10) The air
intake system consists of a dry type air cleaner (1),
turbocharger (2), engine blower (3), and an
aftercooler (4). Engine exhaust gases flow through
the turbocharger (2) driving a turbine wheel. A
compressor wheel on the opposite end of the
turbine wheel shaft rotates and draws in fresh air
through the air cleaner (1), compresses the air and
delivers it to the engine blower (3). Air from the
engine blower (3) flows through the aftercooler (4)
which cools the air before it is delivered to the
engine cylinders.
Figure 1-10. Air Intake System
Figure 1-11. Fuel System.
b. Fuel System.
(fig. 1-11) Fuel drawn from
the fuel tank (1) passes through the supply line (2)
to a fuel-water separator (3), fuel pump (4), and
secondary filter (5) to the engine fuel injectors (6).
Surplus fuel from injectors is returned to the fuel
tank (1) through the return line (7). The fuel-water
separator removes water and large solid particles
from the fuel. The finer particles are removed by
the secondary filter (5) before they can enter the
fuel injectors.
1-1 4
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