SDMO RENTAL POWER R550C2 User And Maintenance Manual page 201

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Coolant Filter, Change
NOTICE! Only applies to engines using Volvo Penta
Coolant (green). Engines using Volvo Penta Coolant
VCS are not fitted with coolant filters.
1 Turn the tap (1) 90° to stop the flow through the
coolant filter.
2 Remove the coolant filter with a suitable extractor.
Make sure that no residue from the old seal
remains in the housing.
3 Put a thin layer of engine oil on the new coolant
filter seal. Screw the coolant filter on by hand until
the seal comes into contact with the mating surface
of the filter bracket. Then tighten the coolant filter
a further 1/2 turn.
4 Turn the tap (1) 90° to release the flow through the
coolant filter again.
5 Start the engine and perform a leakage check.
6 Switch the engine off and check the coolant level.
Refer to Coolant Level, Checking and Topping
Up page 68.
Cooling System, Cleaning
Cooling performance is reduced by deposits in the
radiator 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.
IMPORTANT!
It is extremely important that the correct concentration
and volume of coolant is put in the system. Mix in a
separate clean vessel before filling the cooling system.
Make sure that the liquids mix.
1 Empty the cooling system. Refer to Coolant, Drain-
ing page 70.
2 Put a hose into the expansion tank filling hole and
flush with clean water, as specified by Volvo Penta–
refer to section Water quality in Technical
Data page 84 until the water draining out is com-
pletely clear.
3 If there should still be some contamination left after
flushing for a long time, cleaning can be done with
coolant. Otherwise, continue as in item 8 below.
4 Fill the cooling system with 15-20 % mixture of con-
centrated coolant. Use only Volvo Penta recom-
mended concentrated coolant mixed with clean
water.
Maintenance
71