8
material.
If
3
inches
(76
mm) clearancecannot
be
maintained, install suitable heat shielding be-
tween tailpipe and combustible material or fuel
tank
to
prevent
excessive
heating.
0
Do
not
terminate the exhaust tailpipe:
A. Under a window, door, or any opening that
might allow exhaust gases to enter the coach
interior.
B.
Ahead of or under the generator compart-
ment air intake to prevent recirculation of
exhaust gases. Terminate tailpipe to the
rear
of the compartment air intake.
C.
Under the fuel tank fill spout to prevent spilled
fuel from being ignited by a hot tailpipe.
D.
Under the vehicle to prevent exhaust gases
from entering the coach interior through
small openings in the underside of the
vehicle.
Extend the tailpipe at least
one inch
(25
mm)
beyond the perimeter of the vehicle. Direct
exhaust gases
down
and
away
from the vehicle
away from windows, doors, or compartment
openings.
0
Do
not connect thegenerator set exhaust tailpipe
to the vehicle exhaust system. Exhaust gases will
be forced into the non-running engine and might
be released through the carburetor air inlet.
Water vapor from the exhaust might also damage
the non-running engine.
COOLING
SYSTEM
A constant airflow is critical for engine and generator
cooling to prevent excessive heat build-up. All Eme-
rald series generator sets use a Vacu-Flo cooling
system to provide the required airflow. With Vacu-Flo
cooling, a flywheel fan draws cool air in from the
generator end of the compartment (see Figure
6-3).
The cool air passes over the cooling fins on the
engine and absorbs the heat. The heated air is then
discharged through the opening in the bottom of the
Vacu-Flo scroll.
Discharged cooling air can confain
k&@&d
poisonous exhaust gases which
present the hazard of severe personalinjury or death.
Never
use
discharged cooling air for heating the
coach interior.
The generator compartment air inlet is sized (see
Section
2
SPECIFICATIONS) to allow the required
flow rate of air. The air inlet opening and the air
discharge opening must be kept free
of
any obstruc-
tions to avoid restricting airflow. Dirt, dust, or other
debris that may clog the air duct openings should be
removed during periodic maintenance. Dirt might
also become lodged between the cooling fins on the
engine block and cylinder heads. If this happens,
-
6-7
CS-1266
v
FIGURE
6-3.
COOLING
AIR
FLOW
heat transfer is greatly reduced and overheating can
occur if the fins are not cleaned.
The cooling system consists of the noise shield,
cylinder air housings, scroll, flywheel, and scroll
backplate. When service is necessary, disassemble
and assemble the cooling system as specified in the
following sections.
Disassembly:
Remove the muffler and tailpipe
assembly (see Exhaust System in this section) to
provide access to the cooling system and then pro-
ceed as indicated.
NOISE
SHIELD
CS-1274
FIGURE
6-4.
COOLING
SYSTEM
Redistribution or publication of this document
by any means, is strictly prohibited.
Redistribution or publication of this document
by any means, is strictly prohibited.
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