Kubota Z751KWi, Operator'S Manual

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TROUBLESHOOTING
ENGINE TROUBLESHOOTING
If something is wrong with the engine, refer to the following table for the cause and its corrective measure.
Symptom (if) Cause Remedy
The engine is difficult to start or
will not start. • No operator on the seat. • Sit on the operator's seat.
• Parking brake lever not in the proper position. • Apply the parking brake.
• PTO switch not in the proper position. • Make sure the PTO switch is in the “DISEN-
GAGED” (OFF) position.
• The motion control levers not in the proper po-
sition. • Make sure motion control levers are in the
“NEUTRAL LOCK” position.
• The key switch not in the proper position. • Make sure the key switch is in the “ON” posi-
tion.
• No fuel. • Fill with fuel.
• Improper or stale fuel. (Fuel quality is poor.) • Replace fuel and the fuel filter.
• Water or dirt in the fuel system. • Replace fuel and consult your local KUBOTA
Dealer.
• Fuel hose or fuel filter clogged or damaged. • Clean or replace fuel lines and consult your lo-
cal KUBOTA Dealer.
• Air cleaner clogged. • Clean or replace the air cleaner.
• Spark plug damaged. • Adjust the spark plug gap or replace the spark
plug.
• Check the spark plug wire connection.
• Fuse blown. • Replace the fuse.
• The engine oil viscosity is wrong. • Use oils of different viscosities, depending on
the ambient temperature.
• The battery becomes weak and the engine
does not turn over quick enough. • Clean battery cables and terminals.
• Charge the battery.
• In cold weather, always remove the battery
from the engine, charge and store it indoors.
Install it on the machine only when the ma-
chine is going to be used.
Insufficient engine power. • Insufficient or dirty fuel. • Check the fuel system.
• Fuel filter clogged. • Replace the fuel filter.
• Air cleaner clogged. • Clean or replace the air cleaner.
• Spark plug damaged. • Adjust the spark plug gap or replace it.
The engine stops suddenly. • Insufficient fuel. • Refuel.
• Check the fuel valve position.
Rough engine running. • Spark plug damaged. • Adjust the spark plug gap or replace it.
• Spark plug wire damaged. • Consult your local KUBOTA Dealer.
• Ignition coil damaged. • Consult your local KUBOTA Dealer.
(Continued)
TROUBLESHOOTING ENGINE TROUBLESHOOTING
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Z751KWi,Z781KWi,Z781KWTi