OPERATION287
Thereareseveralwaystodetermineiftheparkingbrakeshavebeenset.Bypulling
outtheyellowknob:
•Anaudiblerushofairwillbeheardwhentheparkingbrakeknobispulled.The
airexhaustsfromtheparkbrakevalveitselfandfromthespringbrakechambers
ontherearaxle(s).
•Ablackringaroundthebaseoftheyellowcontrolknobwillbeseen.
•Theenginewillstallifanattemptismadetosetthevehicleinmotion.
•Therewillbeauctuationintheairpressuregaugeneedles.
•Theknobcannotbepulledoutanyfurther.
DANGER
DONOTattemptinanywayto
disassembleortamperwiththespring
brakechamber.Theforcestoredinthe
spring,ifsuddenlyreleased,cancause
seriouspersonalinjuryordeath.
DANGER
DONOTapplytheparkingbrakewhile
thevehicleismoving.Therearwheels
maylockupcausinglossofvehicle
controlleadingtoanaccident,personal
injuryordeath.
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