Volvo VN - Engine Overspeed; Idling; Low Idle Adjustment

OPERATION301
EngineOverspeed
Thisvehicleisequippedwithadieselengineandshouldnotbeoperatedinanarea
withaconcentrationofhydrocarbonvapors(forexamplegasolineordieselfuel
fumes).Beespeciallycautiousoflow-lyingorclosed-inareas.Thevaporsmaybe
drawnintotheenginethroughtheairintakeandcausetheenginetooverspeed.Hot
carbonandothersparksmaycomefromtheexhaustsystem,andcauseanexplosion
andre.
Ifthevehicleisinanareawherehydrocarbonvaporsmaybepresent,shuttheengine
offimmediatelyifanyabnormalitiesareexperienced.DONOTleaveitunattended.
DANGER
Thedieselenginewilloperateonany
fuelwhichentersthecylinder,whether
itisfromtheinjectorsorfromtheair
intakesystem.Therefore,ifanysolvent
isusedtoushouttheaircleaner
element,theenginemayoverspeed
duringstart-up.Enginedamageand
severeinjuryand/ordeathfromburns
orexplosioncanoccur.
Idling
Dieselenginesareelectronicallygoverned.Theidlespeedispre-programmedfrom
themanufacturer.Lowidlespeedisadjustablewithincertainlimits(formostengines
between600to750rpm).
Thecommonbeliefthatidlingadieselenginecausesnoenginedamageiswrong.
Idlingproducessulfuricacid,whichbreaksdowntheoilandeatsintobearings,rings,
valvestemsandenginesurfaces.
Note:Avoidexcessiveidling.Ifthevehicleisparkedformorethan5minutes,stop
theengine.Anenginecanburnfrom3to5.5liters(0.75to1.5gallons)offuelper
hourwhileidling.Duringlongengineidlingperiods,theenginecoolanttemperature
mayfallbelowthenormaloperatingrange.Incompletecombustionoffuelduringthe
warm-upperiodcancausedilutionoftheoilinthecrankcase,formationoflacqueror
gummydepositsonthevalves,pistonsandrings,andrapidaccumulationofsludge
intheengine.
LowIdleAdjustment
DANGER
Beforesettingtheidle,applytheparking
brakesandplacethetransmissionin
neutral.Failuretodosocanresultin
unexpectedvehiclemovementandcan
causeseriouspersonalinjuryordeath.