Volvo D 20 Operator's Manual download pdf (Page 40)

Maintenance: Seawater system

Seawater system. Draining

If it is not possible to keep the engine compartment

free of frost, the seawater system must be drained to

prevent freezing damage.

Note that all the seawater must be drained. The type

of drainage must be adapted to the way in which the

engine is installed and any additional equipment that

is connected, for example sea water filter (2), vacuum

valve (8), exhaust riser with drain cock (9), silencer (7)

etc.

WARNING! Risk of water penetration. Close the

sea cock before starting work.

IMPORTANT! If the boat is laid-up for winter or

the off season, the seawater system must be

instead flushed clean and protect against

corrosion according to the instructions in the

previous section.

Draining:

1. Close the seawater cock (1).

2. Remove the cover and sealing plate on the sea

water filter (2).

3. Remove the cover (3) from the seawater pump. Let

the water run out.

4. Open the drain cock (4) on the rear end of the heat

exchanger and drain the water off.

5. Disconnect the hoses where indicated by the

arrows (5). Drain the hoses.

6. Connect a hose to the drain cock on the heat

exhaust riser (9) and lower into a vessel. Open the

drain cock and drain the water. Close the drain

cock.

7. Disconnect the hose (6) on the reverse gear oil

cooler and drain the water off.

8. Drain the silencer (7), the exhaust system and any

other additional equipment connected to the

seawater and exhaust systems.

9. Reinstall all hoses, the cover on the seawater

pump and the cover and sealing plate on the

seawater filter. Close the drain cock on the heat

exchanger.

10.Opened the seawater cock the next time the boat

is used.

WARNING! Check that there is no leakage in

the seawater system.

130S

MS10 / MS15

MS15

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Volvo D 20 Operator's Manual Page 40

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