Vetus DT4.70, Руководство по эксплуатации, Страница: 77 / 144

75
6 Maintenance Coolant replacement
Every 1000 operating hours.
51 Drain coolant
Remove the plug (1) and the filler cap (2) •
to allow air into the cooling system.
Remove the hose to the oil cooler (3). • Remove the drain plugs (4) and (5) •
(exhaust manifold and heat exchanger
housing).
Check that all the liquid drains out. •
After draining re-install the drain plugs •
and re-install the hose to the oil cooler.
3 5 4
VD00873
1 2
VD00882
n
ote
Keel cooler
How the cooling system in engines with
keel cooling should be drained depends
on the installation of the keel cooler.
Refer to the keel cooler manufacturer’s
instructions for this.
Check using a coolant hydrometer
whether the coolant is providing sufficient
protection against freezing if total drain-
ing off is not possible.
1,2 x 6,5 7
3 5 4
VD00873
17