EXHAUST SYSTEM
See Figure 6-1. The exhaust system consists of the
exhaust manifold, muffler, tailpipe adapter and tail-
pipe. The muffler is mounted inside the genset
housing. The tailpipe is supplied by the customer.
lA wARNlNG!
Exhaust
gas
is
deadly. The
exhaust
system
must
not
leak
and
must
discharge
all
en-
gine
exhaust
away
from
the vehicle.
Liability
for
injury, death, damage
and
warranty
expense due
to
the use
of
an
unapproved
muf-
fler
or
due
to
modifications
becomes the re-
sponsibility
of
the
person
installing
the unap-
proved
muffler
or
performing
the modifications.
Use Onan
approved
exhaust
system
parts.
Repair the exhaust system before running the gen-
set
if there is damage
or
leaks. Do not try to weld a
broken or leaky tailpipe, muffler
or
manifold.
Tailpipe
If it is necessary to replace the tailpipe, use 1-3/8
inch
I.
D.
j8
gauge steel tubing. Because the tail-
pipe is connected rigidly to the engine (via the muf-
fler) and the engine
is
mounted on vibration isola-
tors, flexible shock-mount hangers must be used
to
support the tailpipe. Important safety warnings and
instructions regarding the routing and termination
of
the tailpipe are included in the Installation Manual.
Muffler
It will probably be necessary
to
remove the genset
from the vehicle. See
Section
5.
Preparing to Ser-
vice.
Remove the
top
panel (see COOLING SYSTEM in
this section). Then remove the two flange bolts
of
the joint between the manifold and the muffler and
the four mounting bracket screws on the ends
of
the
muffler and withdraw the muffler.
When installing the muffler make sure the
self~
aligning joint between the manifold and the muffler
lines up properly for a leak-free joint before tighten-
ing the bracket mounting screws.
Exhaust
Manifold
To
remove the exhaust manifold first remove
the
muffler. On gensets equipped
for
liquid-withdrawal
6-6
of
LPG, disconnect both ends
of
the LPG vaporizer
tubing clamped to the manifold. Remove the four
exhaust manifold bolts and then the manifold and
gaskets. Be sure to cover the openings in the block
to
prevent loose parts and dirt from entering the en-
gine.
IAWARNINGI
Bending
the
fuel
vaporizer
tubing
can weaken
it
to
the
point
that
it
can
crack
allow-
ing
LPG
under
high
pressure
to
escape, result-
ing
in
possible
severe
personal
injury
or
death.
Large volumes
of
LPG
can
be
released
in
the
process
of
disconnecting
a liquid-withdrawal
type
of
LPG
supply
system. See Section
5.
Pre-
paring
to
Service
for
proper
procedures
and
precautions.
When installing an exhaust manifold, always use
new
gaskets and torque the manifold bolts accord-
ing to
Section
4.
Torque Specifications. If the man-
ifold has an LPG vaporizer tube clamped
to
it, con-
nect the tubing ends before tightening the manifold
bolts. Also, if necessary, loosen
the
tubing clamps
to
make the tubing connections easier and then re-
tighten the clamps.
EXHAUST
MUFFLER
ATIACHMENT
MUFFLER
MANIFOLD
FLANGES
MUFFLER
BOTTOM-EXIT
SUPPORT
TAILPIPE
ADAPTER
TAILPIPE
FIGURE 6-1. EXHAUST SYSTEM
-~
To Next Page
Loading...
Need help?
General
