Nanni N4.40, Workshop Manual

Page: 76 / 175

ENGINE
03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM
1-S6
The oil pressure is
low The engine oil is not sufficient Fill up again G-8
The oil strainer is clogged Clean 1-S64
The relief valve does not operate with dirt Clean –
The relief valve spring is weak or defective Replace –
The oil clearance of the crankshaft bearing is too
much Replace 1-S70,
1-S94,
1-S95
The oil clearance of the crankpin bearing is too
much Replace 1-S65,
1-S66,
1-S93
The oil clearance of the rocker arm is too much Replace 1-S50,
1-S81
The oil passage is clogged Clean –
The type of oil used is incorrect Use the specified type
of oil I-4, G-10
The oil pump is defective Replace 1-S25,
1-S63,
1-S99
The oil pressure is
high The type of oil used is incorrect Use the specified type
of oil I-4, G-10
The relief valve is defective Replace –
The engine is
overheated The engine oil is not sufficient Fill up again G-10
The fan belt is broken or the fan belt tension is
too loose Replace or adjust G-14, G-23
The coolant is not sufficient Fill up again G-9
The radiator net and the radiator fin are clogged
with dust Clean –
There is corrosion in the inner side of the radiator Clean or replace G-22
There is corrosion in the coolant flow route Clean or replace G-22,
G-23
The radiator cap is defective Replace 1-S26
The load is too much Reduce the load –
The head gasket is defective Replace 1-S51
The injection timing is incorrect Adjust 1-S28,
1-S30
The fuel used is incorrect Use the specified fuel I-4
Symptom Probable Cause Solution
Reference
Page
KiSC issued 06, 2009 A