Section 4
Section 4
Exhaust SystemExhaust System
Introduction.Introduction. The exhaust system is responsibleThe exhaust system is responsible
for venting exhaust gases, generated by thefor venting exhaust gases, generated by the
engine, to the engine, to the atmosphere. atmosphere. It also It also provides noiseprovides noise
suppression.suppression.
Do not service exhaustDo not service exhaust
system until system until exhaust system exhaust system is cool. is cool. FailureFailure
to do so may result in severe burns.to do so may result in severe burns.
Keep all flammable materialsKeep all flammable materials
away from exhaust components.away from exhaust components.
Avoid breathing toxic exhaustAvoid breathing toxic exhaust
fumes.fumes.
All internal combustionAll internal combustion
engines produce carbon monoxide, which canengines produce carbon monoxide, which can
become concentrated in enclosed areas.become concentrated in enclosed areas.
Exposure to carbon monoxide can result inExposure to carbon monoxide can result in
serious injuries or health hazards, includingserious injuries or health hazards, including
death. death. Properly Properly ventilate work ventilate work areas, ventareas, vent
exhaust fumes, and keep shop clean and dry.exhaust fumes, and keep shop clean and dry.
(A)(A) Initial symInitial symptoms of ptoms of carbon mcarbon monoxideonoxide
poisoning include headaches, dizzi-poisoning include headaches, dizzi-
ness, and ness, and nausea. nausea. The smell The smell of lift of lift trucktruck
exhaust means carbon monoxide isexhaust means carbon monoxide is
present.present.
(B)(B) If you If you experience iniexperience initial symptotial symptoms, shutms, shut
off the lift truck engine, notify youroff the lift truck engine, notify your
6.6. KeeKeep exhp exhausaust syt systestem frm free of ee of debdebrisris..
Exhaust PurifierExhaust Purifier(if equipped)(if equipped).. The The exhaust exhaust puri-puri-
fier converts up to 90% of the harmful dieselfier converts up to 90% of the harmful diesel
exhaust gases, such as carbon monoxide andexhaust gases, such as carbon monoxide and
hydrocarbons, into harmless carbon dioxide andhydrocarbons, into harmless carbon dioxide and
water vapor by forcing the exhaust gases to passwater vapor by forcing the exhaust gases to pass
through a porous ceramic honeycomb configuredthrough a porous ceramic honeycomb configured
catalyst. catalyst. This design This design promotes uniform promotes uniform gas flowgas flow
through the catalyst element while generating onlythrough the catalyst element while generating only
minimal back pressure.minimal back pressure.
Avoid using fuel and oil addi-Avoid using fuel and oil addi-
tives which contain lead, sodium, arsenic,tives which contain lead, sodium, arsenic,
phosphorus, mercury, antimony, zinc, copper,phosphorus, mercury, antimony, zinc, copper,
tin, iron, tin, iron, nickel, and chnickel, and chrome. rome. These additivesThese additives
will poison the exhaust purifier and reduce itswill poison the exhaust purifier and reduce its
useful life.useful life.
Exhaust Purifier MaintenanceExhaust Purifier Maintenance (Illustration 4-1)(Illustration 4-1)..
If the diesel engine is allowed to idle for long peri-If the diesel engine is allowed to idle for long peri-
ods of time, the exhaust purifier may accumulateods of time, the exhaust purifier may accumulate
deposits of deposits of soot. soot. These deposits These deposits can block can block thethe
effectiveness of the exhaust purifier and graduallyeffectiveness of the exhaust purifier and gradually
reduce the engine’s reduce the engine’s power. power. The exhaust The exhaust purifierpurifier
can be removed and cleaned using the proce-can be removed and cleaned using the proce-
dures listed below.dures listed below.
1.1. RemRemove tove the clhe clampamps to res to removmove the ee the exhaxhaustust
purifier from the exhaust system.purifier from the exhaust system.
2.2. RemRemove cove clamlamps to ps to remremove tove the enhe end cond cones toes to
expose the catalyst.expose the catalyst.
33 WaWash tsh the exhe exhausthaust purifpurifier bier by usy using sing steamteam oror
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