TROUBLESHOOTING
TROUBLESHOOTING OF THE ENGINE AND OTHER SYSTEMS
If the machine does not show the desired performance, or when trouble arises, see the following table and undertake
appropriate measures.
Trouble Cause Countermeasure
Engine
Starting difficulties
Fuel is too viscous.
• Check the fuel tank and the filter.
•
Remove the impurities and the water.
• If necessary, replace the filter and the fuel.
Air or water in the fuel system
• Remove the water from the fuel tank.
• Check the bolts and nuts of the fuel-pipe joint for
looseness.
• Purging of the fuel system.
(For fuel filter and supply pump, see Bleeding the fuel
system on page 123)
Fuse is blown out.
• Check the fuse and replace it with a same-capacity
one as required.
Oil viscosity is so high that the engine
runs sluggishly in winter.
• Use the engine-block heater (option).
Battery is almost dead and insuffi-
cient compression.
• Recharge or replace the battery.
Insufficient engine power
Low fuel level • Check the fuel and add if necessary.
Clogged air cleaner • Clean the air-cleaner element.
Engine suddenly stops. Low fuel level
• Check the fuel and add if necessary.
• Purge the fuel system.
Abnormal exhaust gas
color
Poor fuel • Use high-quality fuel.
Too much engine oil • Drain the engine oil to prescribed oil level.
Water temperature in red
zone (overheating)
Damaged seal of the water pump • Replace.
Worn or torn V-belt • Adjust or replace.
Thermostat is damaged. • Replace.
Coolant level is 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 the coolant fluid and add anti-rust.
Damaged radiator cap (causing evap-
oration)
• Replace.
Corroded coolant pipes • Clean.
Continuous operation under full load • Reduce the load.
Cylinder-head gasket is damaged
(causing coolant loss).
• Replace.
Engine-oil level is too low. • Fill to prescribed level.
Maladjustment of fuel injection • Readjust ignition timing.
Use of poor fuel • Purge and use prescribed fuel.
Hydraulic system
Power of lift arms, buck-
et, or drive unit is too low
.
Hydraulic-oil-level is too low. • Add oil.
Leakages of hoses and / or joints • Replace hose or joint.
Hydraulic-unlock-switch is not press-
ed.
• Press the hydraulic-unlock-switch.
(Continued)
TROUBLESHOOTING TROUBLESHOOTING OF THE ENGINE AND OTHER SYSTEMS
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