7-MAINTENANCE
Enginebelts
NOTE:Checktheconditionofthefanandairpumpbeltsafterevery50hoursofoperation.Checkbelttensionafter
every300hoursofoperation.
Fanandalternatorbelt
Thebelt-(1)thatdrivesthecoolingfanandalternatoris
locatedatthefrontoftheengine.
When5
kg(11
lb)ofpressureisappliedmidwaybetween
thebeltpulleys,acorrectlytightenedbeltwilldeect5
mm
(0.2
in).atpoint(A).
Ifthefanbeltisslipping,fanefciencyislowered,resulting
intheenginerunningtoohot.orthealternatornotcharging
Ifthebeltistootight,thelifeofthealternatorbearingwill
beshortened.Ifthefanbeltshowssignsofcrackingor
fraying,installanewone.
NHIL13CT01234AA1
Airpumpbelt
Thebelt(2)thatdrivestheengineairpumpislocatedat
thefrontoftheengine.
When5
kg(11
lb)ofpressureisappliedmidwaybetween
thebeltpulleys,acorrectlytightenedbeltwilldeect
10
mm(0.4
in).atpoint(A).
Iftheairpumpbeltisslipping,pumpefciencyislowered.
Resultinginthe(DPF)burningnotoperatingatahigh
enoughtemperatureordifcultyinstartingburner.Ifthe
beltistootight,thelifeofthepumpbearingwillbeshort-
ened.Ifthefanbeltshowssignsofcrackingorfraying,
installanewone.
NHIL13CT01234AA2
7-21