Ventingofthefueloilsystem
Ifthefuelinthetankisusedup,itislikelythatairhasbeensuckedintothefu鄄
eloilsystem.Ifitisthecase,fueloilwillnotbeabletogetsuckedintotheen鄄
gine.Topreventsuchphenomenon,ventingmustbedoneforthefueloilsys鄄
tem.
ForventingoftheHFC4DA1seriesdieselengine,loosenthenutofhighpres鄄
surepipeofCylinder4,usethestartertostarttheengineforabout10seconds
beforetightenthenut.
1.Pressupanddownthehandleofthemanualoilpumpfixedontheoil/water
separatorforseveraltimes,toleadthefuelcontainingairfromthefueloilsys鄄
temintothejetpump.
2.Aftertheventingofthefueloilsystemisfinished,starttheenginewiththe
startswitch.
3.Iftheenginefailstostartwithin10seconds,thenrepeatStep1and2.
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OWNER爷SMANUAL
JACHighendLightTrucks
Oil/waterseparatoranddrainage
Whentheindicatorlightoftheoil/waterseparatorison,drainageofwatermust
bedoneasperthestepsbelow.
1.Findasafeplacetoparkthetruck.
2.Opentheenginehood,loosenthedrainageplugcounterclockwise,andpush
upanddownthehandleofthemanualpumpontheoil/waterseparatorforsev鄄
eraltimes,untilabout0.1Lwaterisdrained.
3.Afterdrainage,tightenthedrainageplugclockwise,andpushupanddown
thehandleofthemanualpumpontheoil/waterseparatorforseveraltimes.
4.Aftertheengineisstarted,checkifanyfuelisleakingfromthedrainage
plug.Meanwhile,checkiftheindicatorlightofthefuelfilterisoffornot.
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