Troubleshooting - Kubota U17-3 Tier4 Operator's Manual

TROUBLESHOOTING

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