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CHAPTER5 MALFUNCTION AND REMEDY OF DIESEL ENGINE
5-1 Cause and Remedy for the Engine Not Being Started
CAUSE
REMEDY
The weather is cold, machine oil
become more adhesive
Fill machine oil into crankshaft case after pre-
heated.
Fill machine oil into inlet manifold.
Disassemble the connection belt of matching
machine and then start the diesel engine. Stop
the engine when the engine becomes hot and
ressemble the belt. Start the engine again.
Malfunction of fuel system.
The fuel is mixed with water.
Clean fuel tank filter and fuel pipe, change fuel.
The fuel become thickening and
easy to flow.
Use the specific fuel.
There is air in the fuel system.
Drain out the air and tighten each connector of
fuel pipe.
Combustion is not complete
The spray nozzle is not good, delivery angle is
not correct, gasket of cylinder head is leaky and
the pressure of compression is not enough.
Remedy with its cause.
Diesel fuel delivery is inter-
rupted.
Diesel fuel is too little in the fuel tank. Fill the
fuel into the fuel tank. If the fuel pipe and fuel
are obstructed or leaky, remedy them.
Compression pressure is not
enough in the cylinder, the nut of
cylinder head is not tighten or
gasket of cylinder is damaged or
leaky.
Tighten the nut of cylinder head, according to di-
agonal line sequence and standard require-
ment, check gasket of cylinder, if changing the
gasket, tighten the nut of cylinder head once
again after prerunning the diesel engine
The gap of piston ring is too big
because of wear.
Change the piston ring.
Each gap of piston rings line up
and cause leakage.
Set each gap of piston at angle of 120°
The piston rings are sticked seri-
ously or broken.
Clean with diesel fuel or change rings.
Gas valves leakage
Grind the gas valves, if the vestige is too deep,
please send it to factory for temedy.
The valve stem is clipped on
guide pipe.
Disassemble the gas valve and clean the stem
and guide pipe.
