3. Output Insufficient Fuel unit Inspect air cleaner Adjust or replace coupling Inspect fuel supply pump Normal Clean Replace Adjust Retighten Replace Replace Adjust Inspect air leakage of Intercooler Repair Replace Replace Engine disassembly (valve assembly) Disassemble engine or injection pump Repair Replace Disassemble injection pump or engine - 39 - TECHNICAL INFORMATION En gine Installatio n improper Check fo alignemn r coupling t Ot hers C in heck for air mixing fuel mal Clean Insp rod, ect engine co link, cable, e ntrol tc.
Nor mal In of spect air leakage air piping line Insp ect fuel filter over flow valve Nor mal Nor mal Nor mal Che ck valve clearance I nspect injection pipe Nor mal No rmal Ins gas pect cylinder head ket for damage In in at spect injection nozzle, jection pressure, omizing state Nor mal Nor mal Adjust Replace C heck injection timing Nor mal Adjustment Ch eck turbocharger Nor mal