OPERATOR'S MANUAL
Table Of Contents
AIRSYSTEM
TwiceaYear
•Maintaintheaircompressorto
preventexcessiveoilby-pass.
Seeyourmaintenancemanualfor
details.
•Replacewornsealsinvalvesand
airmotorsastheyareneeded.
AirDryer
Thefunctionoftheairdryeristocollect
andremoveairsystemcontaminantsin
solid,liquidandvaporformbeforethey
enterthebrakesystem.Itprovides
clean,dryairtothecomponentsof
thebrakesystem,whichincreases
thelifeofthesystemandreduces
maintenancecosts.
NOTE
Becausenotwovehiclesoperate
underidenticalconditions,
maintenanceandmaintenance
intervalswillvary.Experienceisa
valuableguideindeterminingthe
bestmaintenanceintervalforany
oneparticularoperation.
Every900operatinghoursor25,000
miles(40,200km)oreverythree(3)
monthscheckformoistureintheair
brakesystembyopeningairtanks,
draincocks,orvalvesandcheckingfor
presenceofwater.
NOTE
Asmallamountofoilinthesystem
maybenormalandshouldnot,
initself,beconsideredareason
toreplacethedesiccantcartridge.
Oilstaineddesiccantcanfunction
adequately.
Atablespoonofwaterfoundinthe
airtankwouldpointtotheneedfora
desiccantcartridgechange.However,
thefollowingconditionscanalso
causewateraccumulationandshould
beconsideredbeforereplacingthe
desiccantcartridge.
•Airusageisexceptionallyhigh
andnotnormalforahighway
vehicle.Thismaybedueto
accessoryairdemandsorsome
unusualairrequirementthat
doesnotallowthecompressor
toloadandunload(compressing
5-
50
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