Yamaha EDL13000SDE Manuel D'utilisation page 56

TROUBLESHOOTING
38
a When Output is Insufficient
Cause
*Clean orifice and needle valve,
being very careful not to damage
Carbon stuck
the nozzle orifice.
around orifice of
*Check nozzle to see if good. If
nozzle piece
not, replace with new parts.
*Bad valve and excessive wear of
rings, pistons and liners cause
Compression is
insufficient compression. Replace
insufficient.
with new parts.
Leaking valves
*Grind valves.
Fuel is insufficient. *Check fuel system.
*Check lubricating oil system.
*Check to see if lubricating oil
filter is working properly.
*Filter element deposited with
Overheating of
impurities would cause poor
moving parts
lubrication. Change element.
*Check that bearing clearances
are within factory specs.
*Check injection timing.
zEngine model : D1703-EBG,V2203-EBGx
*Adjust valve clearance to 0.18
Valve clearance is
to 0.22 mm with the engine is
cold.
wrong.
zEngine model : V3300-EBGx
*Adjust valve clearance to 0.23 to
0.27 mm with the engine is cold.
*Clean the element every 250
Air cleaner is dirty
hours of operation.
*Adjust to proper pressure.
Fuel injection
13.7 Mpa (140 kgf/cm
pressure is wrong.
*Do not use poor quality fuel as it
will cause wear of the pump.
Only use No.2-D diesel fuel.
Injection pump
*Check the fuel injection pump
wear
element and delivery valve
assembly and replace as necessary.
Countermeasures
2
, 1991 psi)
a When Engine Suddenly Stops
Cause
*Check the fuel tank and refill the
fuel, if necessary.
Lack of fuel
*Also check the fuel system for air
or leaks.
*If necessary, replace with a new
Bad nozzle
nozzle.
*Check amount of engine oil with
Moving parts are
oil level gauge.
overheated due to
*Check lubricating oil system.
shortage of
*At every second oil change, oil
lubrication oil or
filter cartridge should be replaced.
improper
*Check to see if the engine bearing
lubrication.
clearances are within factory specs.
a When Color of Exhaust Smoke is Black
and Excessive
Cause
*Contact dealer for repairs.
Fuel governing
device bad
Fuel is of extremely
*Select good quality fuel
poor quality.
Use No.2-D diesel fuel only.
*If necessary, replace with new
Nozzle is bad.
nozzle.
*Cause is poor atomization,
improper injection timing, etc.
Because of trouble in injection
Combustion is
system or in poor valve
incomplete.
adjustment, or compression
leakage, poor compression, etc.
Check for the cause.
Engine is operating in *Diagnose and eliminate reason
overload condition. for overload.
Countermeasures
Countermeasures