Troubleshooting - Kubota Super Series 2 KX 91-3 Operator's Manual

TROUBLESHOOTING

If the mini-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.
Engine
Abnormal
exhaust gas
color
Water
temperature
in red zone
(Overheating)
Cause
Lock levers in "UNLOCK"
position
Fuel is too viscous.
Air or water in the fuel
system
Oil viscosity is so high that
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
Countermeasure
* Bring lock lever into "LOCK" position.
* 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 FUEL SYSTEM" in the chapter.
"OTHER ADJUSTMENTS AND REPLACEMENTS".)
* Pour hot water over the radiator.
* 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.
TROUBLESHOOTING 65