AIRSYSTEM
TwiceaYear
•Maintaintheaircompressorto
preventexcessiveoilbypass.
Seeyourmaintenancemanualfor
details.
•Replacewornsealsinvalvesand
airmotorsastheyareneeded.
AirDryer
Thefunctionoftheairdryeristocollect
andremoveairsystemcontaminantsin
solid,liquidandvaporformbeforethey
enterthebrakesystem.Itprovides
clean,dryairtothecomponentsof
thebrakesystem,whichincreases
thelifeofthesystemandreduces
maintenancecosts.
NOTE
Becausenotwovehiclesoperate
underidenticalconditions,mainte-
nanceandmaintenanceintervals
willvary.Experienceisavaluable
guideindeterminingthebestmain-
tenanceintervalforanyonepartic-
ularoperation.
Every900operatinghoursor25,000
miles(40,200km)oreverythree(3)
monthscheckformoistureintheair
brakesystembyopeningairtanks,
draincocks,orvalvesandcheckingfor
presenceofwater.
NOTE
Asmallamountofoilinthesystem
maybenormalandshouldnot,init-
self,beconsideredareasontore-
placethedesiccantcartridge.Oil
staineddesiccantcanfunctionade-
quately.
Atablespoonofwaterfoundinthe
airtankwouldpointtotheneedfora
desiccantcartridgechange.However,
thefollowingconditionscanalso
causewateraccumulationandshould
beconsideredbeforereplacingthe
desiccantcartridge.
•Airusageisexceptionallyhigh
andnotnormalforahighway
vehicle.Thismaybedueto
accessoryairdemandsorsome
unusualairrequirementthat
doesnotallowthecompressor
toloadandunload(compressing
(03/17)Y53-6060-1C15-57
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