Troubleshooting - Kubota u25 Operator's Manual

TROUBLESHOOTING

If the excavator dose 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
too high
(Overheating)
Boom, arm, bucket,
drive, swing and
dozer power is too
Hydraulic
low
System
Swing motor and
front attachment
does not work
Deviation of drive
direction
Drive
System
Drive lever does
not move
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
Worn or torn fan belt
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
Engine oil level too low
Use of poor fuel
Hydraulic oil level too low
Leakages of hoses and /
or joints
Lock lever in "LOCK"
position
Blocked through stones
Track too loose or too
tight
Lock lever in "LOCK"
position
TROUBLESHOOTING
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
*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
*Adjust or replace
*Fill to prescribed level
*Clean
*Replace coolant fluid and add anti-rust
*Replace
*Clean
*Reduce load
*Fill to prescribed level
*Use prescribed fuel
*Add oil
*Replace hose or joint
*Bring lock lever into "UNLOCK" position
*Remove
*Adjust accordingly
*Bring lock lever into "UNLOCK" position
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