Freshwater System; Checking Coolant Level; Filling Coolant - Volvo Penta D7A T Operator's Manual

Freshwater system

Maintenance: Freshwater system

Checking coolant level

WARNING! Never open the pressure cap when
the engine is warm. Steam or hot fluid may spurt
out. Stop the engine and allow it to cool.
When engine is cold the coolant level must be visible
at the lower edge of the filler neck on the expansion
tank.

Filling coolant

The freshwater system (HT) is automatically bled via
the pressure relief spring on the pressure cap on the
expansion tank. Check the closure plug and seal ring
for leaks when the engine is in operation. Tighten the
plug if necessary.
Topping up
IMPORTANT! When topping up, use the same
coolant mixture as already in the system.
Fill the freshwater system (HT) with coolant to the cor-
rect level through the filler opening in the expansion
tank, for correct level, refer to section "coolant level
check". Fill slowly so that evacuated air is able to
pass the filler opening.
NOTE! For coolant specification refer to section
"technical data coolant".
Filling the system when empty
Fill the freshwater system (HT-circuit) with coolant to
the correct level through the filler opening in the ex-
pansion tank, for correct level, refer to section "coo-
lant level check". Fill slowly so that evacuated air is
able to pass the filler opening.
NOTE! For coolant specification refer to section "tech-
nical data coolant".
1. Start the engine and run it under no load until the
thermostat valve opening temperature is reached.
IMPORTANT! The engine must not be
operated under full load before the system has
been bled and topped up.
2. Check air vent for leakage.
3. Stop the engine and allow it to cool. Check the
coolant level and top up if needed.
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