Volvo TAD941GE, Руководство пользователя и инструкция по обслуживанию

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Maintenance
38
Cooling system, cleaning
Cooling performance is reduced by deposits in the radi-
ator and cooling galleries. The cooling system should
be cleaned out when the coolant is changed.
IMPORTANT! Cleaning must not be done if there
is any risk of the cooling system freezing, since
the cleaning solution does not have any frost
prevention ability.
1. Empty the cooling system. Please refer to “Cool-
ing system, draining”.
2. Put a hose into the filling hole in the expansion
tank and flush with pure water, which complies
with Volvo Penta specifications, please refer to
the “Water Quality” chapter, until the water which
runs out is completely clear.
3. If there should still be some contamination left af-
ter flushing for a long time, cleaning can be done
with coolant. Otherwise, continue as in item 8 be-
low.
4. Fill the cooling system with 15-20% mixture of
concentrated coolant. Only use Volvo Penta rec-
ommended concentrated coolant, mixed with
pure
water.
5. Drain the coolant after 1-2 days of operation.
NOTE! To prevent suspended material from settling
back in the system, emptying should be done rapidly,
within the space of 10 minutes, when the engine has
not been standing still for a long time. Remove the fill-
er cap and possibly the lower radiator hose to in-
crease the speed of emptying.
6. Flush the system at once, very carefully, with
pure hot water to stop dirt from settling on the in-
ner surfaces again. Flush until the water that runs
out is completely clean. Make sure that any
heater controls are set to full heating during emp-
tying.
7. If contamination should still be left after a long pe-
riod of flushing, you can do a clean-out with Volvo
Penta radiator cleaner, followed by finishing-off
with Volvo Penta neutralizer. Carefully follow the
instructions on the package. Otherwise, continue
as in item 8 below.
8. When the cooling system is completely free from
contamination, close the drain taps and plugs.
9. Fill up with Volvo Penta recommended coolant,
following the instructions in the chapters entitled
“Coolant, mixing” and “Coolant, filling”.
IMPORTANT! It is extremely important that the
correct concentration and volume of coolant is
put in the system. Mix in a separate clean ves-
sel before filling the cooling system. Make sure
that the liquids mix.