ETQ 178F User Manual

CHAPTER 5 ENGINE TROUBLESHOOTING
5-1 Engine is not starting
Possible Cause Remedy
Weather is cold. Engine oil may have become
overly
adhesive.
Put engine oil into crankcase after preheated. Put
engine
oil into the inlet manifold. Disconnect the
belts
to the engine and run engine under no load
conditions
until the engine becomes hot. Then
connec
t
the
b
elts
b
ack and star
t
the engine again.
Fuel system may be contaminated with water. Clean the fuel filter and fuel pipe, and then replace
the
fuel with new fuel.
The fuel has thickened and does not permit easy
flow.
Use the correct specific fuel.
There is air in the fuel system. Drain out the air and fuel and tighten the
connectors
of the fuel pipe.
Very little fuel injected into cylinder or the injected
spray
is bad.
Check the position of the speed governor handle
and clean the fuel injector spray nozzle. Check the
fuel
pump and change the pump or fuel nozzle if
necessary.
Incomplete combustion The spray nozzle may be bad, or the delivery angle
may
be incorrect. The gasket of the cylinder head
may
be leaking and the pressure of compression is
not
held. Fix each component that is necessary to
achieve
correct compression and a correct angle of
spray.
Fuel delivery is not constant Fuel level in fuel tank may be to low. Fill the fuel
tank
until it is full. Or the fuel pipe or fuel filter
may
b
e clogged, fix this
b
y replacing them.
Low compression
Replace head gasket or tighten the cylinder head
bolts
in a diagonal line pattern. If changing the
head
gasket, tighten the cylinder head bolts once
again
after running the engine.
Piston rings worn leading to low compression Change the piston rings.
Piston ring gaps may all be set up in a line
Make sure each piston ring gap is off by an angle
of 120 de
g
rees f
r
om each other.
Piston rings are stuck or broken
Clean the rings and cylinder with diesel fuel and or
re
p
lace the
r
in
g
s if necessa
r
y
.
Gas valves are leaking
Grind the gas valves, if the vestige is too deep,
p
lease send i
t
to the factor
y
fo
r
re
p
lacemen
t
Incorrect valve clearance
Adjust the clearance as specified in the technical
s
p
ecifications chart.
The valve stem is clipped on the guide pipe Disassemble the gas valve and clean the stem and
guide
pipe.
5-2 Diesel engine lacks power
50

ETQ 178F Specifications

General

Brand	ETQ
Model	178F
Category	Engine
Language	English