Peterbilt 348 2017 - Page 268

AIRSYSTEM
andnon-compressingcycle)ina
normalfashionoritmaybedueto
excessiveleaksintheairsystem.
•Inareaswheremorethana30°
F(17°C)rangeoftemperature
occursinoneday,smallamounts
ofwatercanaccumulatein
theairbrakesystemdueto
condensation.Underthese
conditions,thepresenceofsmall
amountsofmoistureisnormal
andshouldnotbeconsideredas
anindicationthatthedryerisnot
performingproperly.
•Anoutsideairsourcehasbeen
usedtochargetheairsystem.
Thisairdidnotpassthroughthe
dryingbed.
Overhaul
Maintenanceintervalstypicalfor
on-highwayoperationwouldbe2-3
years,350,000milesor10,800hours.
Maintenanceintervalstypicalforhigh
dutycycleusagesuchastransitbus,
refusehauler,dumptruck,cement
mixersandoff-highwayoperation
wouldbe1year,100,000milesor
3,600hours.
NOTE
Reviewthewarrantypolicybefore
performinganymaintenanceproce-
dures.Anextendedwarrantymay
bevoidedifunauthorizedmainte-
nanceisperformedduringthispe-
riod.
Bendix®AD-ISSeriesAirDryer
Yourvehiclemaybeequippedwitha
Bendix®AD-ISseriesairdryer.Any
airdryerreplacementshouldbemade
withanidenticalcomponent.
WARNING!
Ifadifferentairdryerbrandormodel
isinstalledonthevehicleotherthan
whatwasoriginallyinstalled,itcould
causetheairsystemtonotperform
correctlyunlessthefullairsystem
designisreviewedandmodica-
tionsmadetocomplywithFederal
MotorVehicleSafetyStandards
(FMVSS)121-AirBrakeSystems.
Failuretoabidebythiswarningand
maintaincompliancetoFMVSS121
couldcauselossofvehiclecontrol
andmayleadtodeathorserious
personalinjury.
TheAD-ISSeriesairdryerhas
incorporatedintoitsdesignvarious
5-58Y53-6060-1C1(03/17)
5