Yanmar Lx410 Operator's Manual page 155

The problem is:
The engine has no
power
17. TROUBLESHOOTING
The possible cause(s) are:
1. A problem in the fuel
2. A problem in the cooling
3. A problem in the lubrication
4. A problem in the engine mechanical
Remedy:
1. Fuel system
• Check whether the specification of
the fuel used is correct.
• use correct fuel specification
• Check whether there is water in the
sediment bowl.
• remove the water and clean the
sediment bowl
• Check whether the fuel filter is
clogged.
• replace the fuel filter
• Check whether air is present in the
fuel system.
• bleed air from the fuel system
• Check whether the fuel injection
pump is out of timing.
• contact YOUR LOCAL YANMAR
TRACTOR DEALER
• Check whether the fuel nozzles are
faulty.
• contact YOUR LOCAL YANMAR
TRACTOR DEALER
2. Cooling system
• Check whether the air intake for
radiator is clogged.
• clean the air intake for radiator
• Check whether the engine is
overheating.
• contact YOUR LOCAL YANMAR
TRACTOR DEALER
• Check whether the coolant
temperature is too low.
• contact YOUR LOCAL YANMAR
TRACTOR DEALER
3. Lubrication system
• Check whether the engine oil
viscosity is high.
• replace engine oil with the specified
viscosity
• Check for a clogged in the crankcase
ventilation tube.
• contact YOUR LOCAL YANMAR
TRACTOR DEALER
4. Engine mechanical system
• Check whether the valve clearance is
correct.
• contact YOUR LOCAL YANMAR
TRACTOR DEALER
17-4
Lx410/450/490 Operator's Manual