Seawater System, Draining - Volvo Penta D1 Series Operator's Manual

47711262 01-2019 © AB VOLVO PENTA

Seawater System, Draining

WARNING!
Risk of water entry. Close the seawater cocks before
doing any work on the seawater system.
To prevent freeze bursting, the raw water system must
be drained during cold weather when there is a risk of
freezing. An alternative to draining is to keep the
engine bay warm using an approved heater fan.
NOTICE!
Do not connect the hose to the oil cooler on the reverse
gear (6) for D1–13 and D1–20 engines. The oil cooler
is only active for larger engines.
Note that all raw water must be drained and that the
draining process must be adapted to suit the engine
installation and any auxiliary equipment connected to
it, such as a raw water filter (2), vacuum valve (8),
exhaust riser and drain tap (9) and silencer (7) etc.
1 Close the sea cock (1).
2 Remove the cover and the sealing plate on the raw
water filter (2).
3 Remove the cover (3) from the raw water pump and
let the water run out.
4 Open the drain tap (4) on the heat exchanger side
panel and drain off the water.
5 Loosen the hoses at the arrows (5) and empty them
of water.
6 Connect a hose to the drain tap on the riser (9) and
lead it into a container. Open the tap and drain off
the water. Close the tap.
7 Remove the hose (6) on the reverse gear oil cooler
and drain off the water.
8 Drain the silencer (7), the exhaust system and other
auxiliary equipment connected to the raw water and
exhaust systems.
9 Reinstall all hoses, the raw water pump cover and
the raw water filter cover and sealing plate. Close
the heat exchanger drain tap.
10 Open the raw water tap when the boat is returned
to operations.
Check that no leakage exists in the raw water
system.
Maintenance
61