Peterbilt 348 2017 - Page 276

BRAKESYSTEM
DrumBrakes
Havebrakedrumliningsanddisc
brakepadsinspectedbyaqualied
mechanicforwearatregularintervals
accordingtothemaintenance
schedule.Insevereserviceor
off-highwayapplicationsinspectthe
liningsmorefrequently.
AutomaticSlackAdjusters
PeriodicallychecktheBrakeChamber
Stroke.Replacetheslackadjusterif
properstrokecannotbemaintained.
Operationalchecksofautomatic
slackadjusters
•Measurebrakechamberstroke
withthespringbrakereleasedand
theairpressurenolessthan100
psi(690kPa).
•BrakeChamberStrokeisthe
differencebetweentheapplied
andtheretractedpositionofthe
airchamberpushrod.
•Acorrectlyinstalledand
functioningautoslackadjusterwill
producethefollowingstrokes:
ChamberTypeStroke
36(rearbrakes)1-1/2"-2-1/4"
(38-57mm)
30(rearbrakes)1-1/2"-2"
(38-51mm)
16,20&24(front
brakes)
1"-1-3/4"
(25.4-44.4mm)
BrakeChamberStroke
5-66Y53-6060-1C1(03/17)
5