Chapter 1 Malfunction and Troubleshooting for Diesel Engine
1. Causes and Troubleshooting for the Engine Not Being Started
It is cold
Machine oil is viscous
Fill machine oil into crankcase after warming-up.
Fill machine oil into inlet pipe
Remove the connection belt from the machine
Start the engine and stop it when it is heating, assemble the belt
and then restart the engine.
Failure of fuel system
Water mixed in the fuel
Clean fuel tank, fuel filter and fuel pipe, then change the fuel.
The fuel get thickening and can’t flow
Use prescribed brand fuel
Air exists in fuel system
Emit the air, tighten each connect part to the fuel pipe
Injection fuel is little or the spray is not
Check the position of governing handle or check and clean the
fuel nozzle, change the nozzle if necessary.
Mainly by ill spray
Incorrect delivery angle
Leakage in gasket of cylinder head
Deficiency in pressure of compression
Interrupted of diesel fuel
Lack of oil, should fill fuel into the fuel tank. If have obstruction
or leakage in the fuel pipe and fuel filter, drain out them with the
Deficiency in pressure of compression;
Loosen in the nut of cylinder head;
Damage or leakage in the gasket of cylinder
Tighten the nut of cylinder head in the diagonal sequence; check
the gasket of cylinder as per the standard requirement. When the
engine with the new gasket is heating, tighten the nut of cylinder
Big gap in the piston ring due to wear and
Change the piston ring
Leakage caused by each gap of piston ring
lined in one direction
Make each gap of piston at angle of 120
Serious stickiness or breakage in piston
Clean it by diesel fuel or change the piston ring.
Leakage in gas valves
Skive the gas valve, or send it to repair factory if the vestige is
Incorrect in valve clearance
Adjust the gap as specified.
The valve stem is clipped in the guide pipe Disassemble the gas valve, clean