7-6
EXHAUST SYSTEM
The genset exhaust system must be gas-tight and
prevent entry of exhaust gases into the vehicle inte-
rior.
WARNING
EXHAUST GAS IS DEADLY! Keep
exhaust gases from entering the vehicle — Do
not terminate the exhaust tail pipe underneath
the vehicle or closer than 6 inches (153 mm) to
openings into the vehicle. Route the exhaust
system such that it is protected from damage
(Figures 7-8, 7-9 and 7-10). Use approved mate-
rials only.
CAUTION
Unauthorized modifications or re-
placement of fuel, exhaust, air intake or speed
control system components that affect engine
emissions are prohibited by law in the State of
California.
Failure to provide and maintain an approved spark
arresting exhaust system can be a violation of the
law. Liability for damage, injury and warranty ex-
pense due to the modification of the exhaust system
or to use of unapproved parts is the responsibility of
the person performing the modification or installing
the unapproved parts. Contact an Onan dealer for
approved exhaust system parts.
Removing Exhaust Manifold
1. Remove the generator/engine assembly from
the genset. See REMOVING / INSTALLING
GENERATOR / ENGINE ASSEMBLY, Sec-
tion 9. Engine.
2. Remove the eight fan shroud bolts and remove
the fan shroud (Figure 7-1).
3. Remove the two flange bolts in each of the two
exhaust outlet flanges and remove the man-
ifold (Figure 7-4).
Installing Exhaust Manifold
Installation is the reverse of removal. Always install
new flange gaskets when reinstalling the exhaust
manifold and torque the flange nuts to 20 lb-ft
(26 N-m).
MODELS
HGJAC, HGJAF
MODELS
HGJAA, HGJAB,
HGJAD, HGJAE
FIGURE 7-4. EXHAUST MANIFOLD
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