TM 5-4930-218-14
(6) Remove the starting motor (para 4-24) and
that secure the engine to the engine base (87); lift off
generator (para 4-25).
the engine and set it on blocks.
(12) Remove the pipe cap (67) from the nipple
(7) Remove the drive belts and guard (para 4-36).
(8) Remove the drive pulley and adapter shaft
(70), draining the oil in a container. Loosen the cap
screw (68) and pull the engine oil trough (69) from the
(9) Disconnect the air piston (27, fig. 4-4) from
pipe nipple. Remove the pipe nipple (70) and adapter
(71).
the throttle control mechanism.
(10) Disconnect the oil pressure tube from be-
(13) Refer the engine to higher echelon main-
tween the engine and the manifold on the engine
tenance for repair.
base (para 4-26a).
b. Installation. Engine installation is the reverse of
(11) Wrap a sling around the engine (76) and sup-
removal, Refer to figure 4-4. Make all adjustments in-
port the engine weight. Remove the four cap screws
dicated in the installation portion of the referenced
(72), nuts (73), lock washers (74), and flat washers (75)
paragraphs before starting the engine.
Section XIV. AIR SYSTEM
4-39. General.
dispenser is used when you are operating at less than
32F (0C). It adds alcohol vapor to the air system,
a. Air pressure for your lubricating and servicing
preventing accumulations of moisture from freezing
is supplied by an engine-driven compressor that is
in the air-operated equipment and causing you
mounted on the air reservoir. Air is forced into the
trouble. Air from the reservoir is also applied to one
reservoir through an aftercooler line that helps to
of the hose reels at the rear of the lubricating and
dissipate heat of compression before it enters the
servicing unit to help you when inflating tires, for
reservoir. A check valve is connected between the af-
cleaning parts, and for other applications requiring
tercooler and the reservoir to prevent reverse flow of
compressed air. A reservoir drain valve is installed at
air to the air compressor. The air reservoir is protec-
the lower rear of the unit, You can operate this valve
ted by a safety valve which prevents excessive
with an operating handle at the rear of the unit.
pressures in the air system in the event of failure of
the compressor unloader system.
b. Air pressure from the air reservoir is applied to
an air manifold through an air plunger valve and
WARNING
alcohol dispenser. From the manifold it is applied to
Drain all air from air system before
the air-driven lubricant pumps. The pumps operate
disconnecting piping.
when there is air pressure in the reservoir and the air
plunger valve control knob is pulled out. The alcohol
and proceed as follows:
