Shibaura N843 - Engine Trouble Shooting; Engine Does Not Start; Irregular Engine Speed; Engine Stops During Operation

109823_2/09 6-1
SECTION 6: TROUBLE-SHOOTING
Symptom Cause Remedy
Defective key switch Check electrical connection and contacts.
Insufficient charging or completely dis-
charged battery.
Charge.
No fuel. Check and refill fuel tank.
Air mixed in the fuel system. Tighten all fuel system connections.
Clogged fuel filter. Replace the fuel filter.
Engine does not start Irregular of improper fuel supply. Injection pump malfunction. Repair by
Bosch qualified repair shop.
Defective glow plug. Replace.
Improper viscosity of lubricating oil. Check and change.
Clogged air cleaner. Clean the air cleaner.
Low compression. Check and correct each part.
Defective engine stop solenoid. Check or replace wiring.
Air mixed in the fuel system. Discharge air from the fuel.
Uneven fuel injection. Injection pump problem. Have corrected in
a Bosch qualified repair shop or
replaced.
Irregular engine speed Clogged fuel filter. Replace the fuel filter.
Governor malfunction. Check and adjust.
Improper function of engine main body. Overhaul, check and correct each part.
No fuel in fuel tank. Refill fuel tank.
Engine stops during
operation
Clogged fuel filter. Replace the filter.
Air mixed in the fuel system. Tighten all fuel system connections.
Worn engine. Overhaul, repair or replace worn parts.
Insufficient coolant. Refill with coolant, and check for leaks and
repair.
Loose or slipping fan belt. Clean oil dust, etc. and retighten.
Fan belt failure. Replace.
Clogged radiator. Clean the radiator.
Engine overheats Clogged radiator fins. Clean.
Cooling water passage clogged with dust,
etc.
Flush cooling system.
Thermostat malfunction. Check and replace.
Insufficient lubricating oil. Check and fill as necessary.
Overload. Decrease the load.
Improper engine
exhaust color
Too much engine oil. Check and adjust the quantity.
Too low viscosity of engine oil. Check and change.
Improper injection timing.
Improper fuel. Check and change.
Improper engine
exhaust (black or
dark gray)
Excessive fuel injection.
Improper function of engine main body. Check a correct each part.
Overload. Reduce the load.
Clogged air cleaner. Clean the element.
Loose fan belt. Correct belt tension.
Wiring problem. Check and repair.
Improper charging Defective battery. Replace.
Defective alternator. Replace.
Loose or disconnected wires. Check and install or tighten.