Nanni N4.40, Workshop Manual

Page: 96 / 175

ENGINE
03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM
1-S26
Fan Belt Damage and Wear
1. Examine the fan belt for damage.
2. If the fan belt has a damage, replace it.
3. Examine if the fan belt is worn out and sunk in the pulley groove.
4. If it is, replace it.
M00000003GEG0017US1
CAUTION
• Remove the radiator cap only after you stop the engine for a minimum of 10 minutes to decrease its
temperature. If not, hot water can gush out and cause injury.
M00000003ENS0022US1
Radiator Cap Air Leakage
1. Set a radiator tester and an adaptor on the radiator cap.
2. Apply the specified pressure 90 kPa (0.9 kgf/cm
2
, 10 psi), and
measure the time for the pressure to decrease to 60 kPa
(0.6 kgf/cm
2
, 9 psi).
3. If the measurement is less than the factory specification,
replace the radiator cap.
M00000003ENS0023US1
Radiator Water Leakage
1. Fill a specified quantity of water into the radiator.
2. Increase the water pressure to the specified pressure with the
radiator tester and adaptor.
3. Examine the radiator for water leakage.
4. For water leakages from the pinhole, replace the radiator or
repair with the radiator cement. When water leak is too much,
replace the radiator.
NOTE
• The pressure of the leak test is different for each radiator
specification. Thus, refer to the test pressure of each
radiator specification to do the leakage test.
M00000003ENS0024US1
(A) Good (B) Bad
Pressure decreasing
time
Factory spec.
More than 10 seconds for
pressure decrease from 90
to 60 kPa (from 0.9 to
0.6 kgf/cm
2
, from 10 to
9 psi)
Radiator water leakage
test
Factory spec.
No leak at specified
pressure
KiSC issued 06, 2009 A