Yanmar ACHILLES A18SE, Owner'S Handbook Manual

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71
If the excavator does not show the desired performance, or when trouble arises, refer to the
table below and undertake appropriate measures.
Trouble Cause Countermeasure
En
gi
n
e
Starting
difficulties
Fuel is too viscous
* Check fuel tank and filter
* Remove impurities and water
* If necessary, replace filter
Air or water in the fuel
system
* Remove water from the fuel tank
* Check fuel pipe joint bolts and nuts for
looseness
* Purging of the fuel system (for fuel filter and
injection pump, see "PURGING OF THE FUEL
SYSTEM" in "OTHER ADJUSTMENTS AND
REPLACEMENTS".)
Oil viscosity is too high
the engine runs
sluggishly in winter
* Pour hot water over the radiator
* Use oils of different viscosities depending on
the ambient temperature. (Use SAE10W,
SAE10W-30 or SAE10W-40)
Battery is almost dead;
insufficient
compression
* Recharge battery
Insufficient
engine power
Low fuel level * Check fuel and add if necessary
Clogged air cleaner * Clean the air filter element
Engine
suddenly stops
Low fuel level
* Check fuel and add if necessary
* Purge the fuel system
Abnormal
exhaust gas
color
Poor fuel * Use high quality fuel
Too much engine oil * Drain engine oil to prescribed oil level
Water
temperature
in red zone
(Overheating)
Defective seal of the water pump * Replace
Worn or torn fan belt * Adjust or replace
Thermostat is defect * Replace
Coolant level too low * Fill to prescribed level
Radiator grill or fins
are clogged
* Clean
Coolant is
contaminated with rust
from the cylinder head
or crank case
* Replace coolant fluid and add anti-rust
Defective radiator cap
(Evaporation)
* Replace
Corroded coolant pipes * Clean
Continuous operation
under full load
* Reduce load
Cylinder head gasket is
damaged (Coolant loss) * Replace
Engine oil level too low * Fill to prescribed level
Maladjustment of fuel injection * Readjust ignition timing
Use of poor fuel
* Use prescribed fuel
TROUBLESHOOTING