New Holland Workmaster 50 Operator's Manual page 162

Problem
The engine stops after
ignition
The engine does not reach
the operating speed
Emission of black smoke
from the exhaust pipe
Light emission of white
smoke from the exhaust
pipe
Abundant emission of
white smoke from the
exhaust pipe
The pressure gauge
shows a too low engine
oil pressure and the
corresponding warning
light comes on
The oil pressure warning
light comes on
The coolant temperature
warning light comes on
8 - TROUBLESHOOTING
Possible Cause
The electric cables are disconnected or
they do not guarantee continuity
Clogged fuel filter
Presence of air in the fuel supply circuit
Injection pump malfunction
Dirty or faulty injectors
Water and/or impurities in the fuel
Clogged air filter
Insufficient combustion air flow
Engine overheating
Overload
Dirty or faulty injectors
Faulty turbocharging turbine
oil level too high
Worn segments
Worn valve guideways
Burnt gasket head
Water pump malfunction
Thermostat valve malfunction
Coolant too low
Failure of pressure gauge
Oil level too low
Oil pump failure
Faulty sensor
Engine oil filter blocked
Engine oil pressure too low
Coolant too low
Stuck overpressure valve of the load plug Replace the plug
Water pump malfunction
Thermostat valve malfunction
Check the electric connections
Replace filter (See "Fuel filter replace-
ment.")
Carry out bleeding (See "Fuel supply circuit
bleeding")
Apply to a service workshop
Replace the injectors
Apply to a service workshop
Apply to a service workshop
Clean or replace the filter
Apply to a service workshop
Apply to a service workshop
Reduce the load
Replace the injectors
Apply to a service workshop
Replace the turbine
Apply to a service workshop
Adjust the oil level
Check compression
Apply to a service workshop
Check wear
Apply to a service workshop
Apply to a service workshop
Replace the pump
Apply to a service workshop
Replace the belt (See "Changing the belt
(type Poly-V)")
Replace the valve
Apply to a service workshop
Top up, if necessary (See "Engine coolant
level check")
Check or replace the pressure gauge
Apply to a service workshop
Adjust the oil level (See "Engine oil level
control")
Check or replace the pump
Apply to a service workshop
Check and, if appropriate, replace the sen-
sor.
Apply to a service workshop
Replace the engine oil filter (See "Oil filter
cartridge replacement")
Turn off the engine. Apply to a service
workshop
Adjust the engine coolant level (See "En-
gine coolant level check")
Replace the pump
Apply to a service workshop
Replace the valve
Apply to a service workshop
8-2
Correction