Exhaust System; Diesel Exhaust Fluid (Def) - Kohler 500EOZCS Operation

3.6 Exhaust System

WARNING
Carbon monoxide.
Can cause
fainting, or death.
The exhaust
leakproof and routinely inspected.
Inspecting the exhaust system. Carbon monoxide can
cause severe nausea, fainting, or death. For the safety of
the craft's occupants, install a carbon monoxide detector.
Never operate the generator set without a functioning carbon
monoxide detector. Inspect the detector before each
generator set use.
At the interval specified in the service schedule, inspect
the exhaust system components (exhaust manifold,
mixing elbow, exhaust hose, hose clamps, silencer, and
outlet flapper) for cracks, leaks, and corrosion.
Ensure that the carbon monoxide detector(s) is (1) in the
craft, (2) functional, and (3) energized whenever the
generator set operates.
For your safety: Never operate the generator set
without
monoxide detector(s) for your
safety and the safety of others on
your vessel.
Exhaust System Inspection Points
Check for exhaust leaks and blockages. Check the
silencer and piping condition and check for tight exhaust
system connections.
Check the hoses for softness, cracks, leaks, or dents.
D
Replace the hoses as needed.
Check for corroded or broken metal parts and replace
D
them as needed.
Check for loose, corroded, or missing clamps.
D
Tighten or replace the hose clamps and/or hangers
as needed.
Check that the exhaust outlet is unobstructed.
D
Visually inspect the exhaust system for exhaust leaks
D
(blowby). Check for carbon or soot residue on
exhaust components.
indicates an exhaust leak. Seal leaks as needed.
Check the thermal insulation wraps and secure if
D
needed.
TP-7126 5/20
severe nausea,
system must be
a functioning carbon
Carbon and soot residue

3.7 Diesel Exhaust Fluid (DEF)

Some models are equipped with a DEF tank. DEF is
used as a consumable in selective catalytic reduction
(SCR) systems in order to lower the NO
in the diesel exhaust emissions.
Diesel exhaust fluid from a separate DEF tank is injected
into the exhaust system where the urea/ionized water
solution vaporizes and forms ammonia and carbon
dioxide. Within the SCR catalyst, the NO
is reduced by the ammonia into water and nitrogen and
is expelled out of the exhaust system into the
atmosphere.
SCR systems are sensitive to potential impurities in the
urea solution so keep open containers sealed. The urea
solution is clear and non-toxic but it can corrode some
metals including but not limited to aluminum, copper,
iron, magnesium, nickel, steel, and zinc.
See the generator set spec sheet or engine operation
manual for DEF solution requirements.
recommended that surplus DEF be stored in a cool, dry,
and well ventilated area with a temperature range of
10_C- 30_C (50_F- 86_F) and kept out of direct sunlight
to ensure a one-year shelf life. It should be stored and
transported per the manufacturer's recommendations
in the original purchased container; otherwise,
containers made of polyethylene, polypropylene, or
stainless steel are acceptable.
If the generator set contains a DEF tank, check and fill
the DEF tank as needed during the prestart check and
during regular diesel fuel refill intervals. The DEF level is
reported and displayed on the generator set controller.
When the level falls below 10% a warning symbol is
displayed.
Section 3 Scheduled Maintenance
concentration
x
concentration
x
It is
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