Nanni N16.1000 CR3, Руководство оператора, Страница: 80 / 119

80
S08 MAINTENANCE
Internal: Removing oil and grease
ENVIRONMENT
Use a suitable container. Used coolant must be dis-
posed of as specified in national and international laws
and regulations.
Always fit a new thermostat and a new cover to the ex -
pansion tank after cleaning, as the oil in the cooling sys-
tem destroys the seals. If the engine is equipped with a
coolant filter, also renew this filter.
It may be necessary to wash it multiple times if the
cooling system is very dirty. One cause of contamina-
tion can be that oil is lying on top of the coolant and
collecting high up in the cooling system. If several rins-
es are needed, this is not necessarily because work has
been carried out incorrectly. Oil residues often need to
be rinsed repeatedly from the expansion tank and the
external heating system to be completely clean.
Repeated washing is more effective and preferable to
using higher concentrations of detergent (max. 10%) or
cleaning for a longer period (max 30 minutes).
If only a small amount of dirt has collected in the ex-
pansion tank after cleaning, one extra rinse and clean of
the expansion tank only is usually sufficient. There is no
need to clean the whole cooling system again.
1. Run the engine until it has reached operating tem-
perature if possible and then drain the cooling system
following the previous description.
2. Remove the thermostats.
3. Fill the cooling system with clean hot water mixed
with detergent 2 479 017. Detergent # 2 479 017 must
make up 5-10% (depending on the degree of dirt) of the
total coolant volume. If detergent # 2 479 017 is not
available, use a dishwashing detergent for domestic ap-
pliances that does not foam. Concentration 1%.
4. Warm up the engine for approximately 20-30 min-
utes. Remember to switch on the cab heating system,
if one is installed.
5. Drain the cooling system.
6. Fill the cooling system with clean, hot water and run
the engine for about 20-30 minutes.
7. Repeat steps 3-6 if the cooling system is not clean.
8. Drain the water from the cooling system.
9. If necessary, clean the expansion tank by detaching
all hoses and rinsing and cleaning with a degreasing
agent and a dish brush.
Alternatively, dismantle the expansion tank and clean it
with water with 10% of detergent # 2 479 017. Fill the
expansion tank with the mixture, shake it and drain it.
Renew the cover of the expansion tank.
10. Refit the thermostats.
11. Fill the cooling system with new coolant as described
in the next section.
12. Check again whether further dirt or oil has collected
in the expansion tank. Decide whether it it is necessary
to carry out another full cleaning or whether only rinsing
or cleaning of the expansion tank will suffice.
Internal: Removing deposits
ENVIRONMENT
Use a suitable container. Used coolant must be dis-
posed of as specified in national and international laws
and regulations.
1. Run the engine until it has reached operating temper-
ature if possible and then drain the cooling system fol-
lowing the previous description.
2. Remove the thermostats.
3. Fill the cooling system with clean, hot water mixed
with radiator detergent which is based on sulphamic
acid and contains dispersing agents. Follow the manu-
facturer’s instructions for the concentration and clean-
ing period.
4. Run the engine for the specified time. Remember to
switch on the cab heating system, if one is installed.
5. Drain the cooling system.
6. Fill the cooling system with clean, hot water and run
the engine for about 20-30 minutes.
7. Drain the water from the cooling system.
8. Refit the thermostats
9. Fill the cooling system with new coolant as described
in the next section.