4. MAINTENANCE 6. Engine (Continued) 66 Problem Cause Remedy Engine overheated Engine oil insufficient Replenish. Fan belt broken or elongated Change or adjust. Cooling water insufficient Replenish. Radiator net and radiator fin clogged with dust Clean. Inside of radiator corroded Clean or replace. Cooling water flow route corroded Clean or replace. Radiator cap defective Replace. Overload running Lessen the load. Head gasket defective Replace. Incorrect injection timing Adjust. Unsuitable fuel used Use the specified fuel. Deficient output Incorrect injection timing Adjust. Engine’s moving parts seem to be seizing Repair or replace. Uneven fuel injection Repair or replace injection pump.
Deficient nozzle injection Repair or replace nozzle. Compression leak Replace head gasket, tighten cylinder head bolt, glow plug and nozzle holder. Battery quickly discharges Battery electrolyte insufficient Replenish distilled water recharge. Fan belt slips Adjust belt tension or charge. Wiring disconnected Connect. Rectifier defective Replace. Alternator defective Replace. Battery defective Change.