Mercedes-Benz OM 904-926 LA BlueTec, Руководство по эксплуатации

Страница: 77 / 112

X
Check the coolant level and correct if nec-
essary.
X
Replace coolant expansion tank cap and
tighten it.
Renewing the coolant
G
WARNING
When opening the coolant expansion tank,
there is a risk of scalding, due to hot coolant
spraying out. The cooling system and coolant
expansion tank are pressurised when the
engine is at operating temperature. Wear
gloves and eye protection.
Open the coolant expansion tank only at a
coolant temperature below 50 † .
G
WARNING
Coolant contains glycol and is therefore toxic.
Do not swallow the coolant. See a doctor
immediately if you swallow coolant.
Make sure that coolant does not come into
contact with skin, eyes or clothing. In case of
contact with eyes, rinse immediately with
plenty of clean water. Clean affected areas of
skin and clothing with soap and water imme-
diately. Change any affected clothing imme-
diately.
Before renewing the coolant, check the cool-
ing and heating system for leaks and condi-
tion. Have the coolant renewal confirmed in
the Maintenance Booklet.
Draining the coolant
H
Environmental note
Dispose of used coolant in accordance with
current local regulations.
X
Undo the engine cooling system cap slowly,
relieving the excess pressure, and remove
it.
X Heating systems: open the heating system
temperature control (control valve).
X Cover the lines etc. under the drain plugs.
X
Place a suitably sized receptacle under-
neath to catch the coolant.
X Plug the drain hose onto coolant drain
plug
:
on the crankcase.
X
Release drain plug
:
and collect the cool-
ant.
X
Clear blocked drainage openings of depos-
its.
X
Tighten coolant drain plug
:
on the engine
with a new seal (tightening torque:
60 Nm).
X
Screw in other drain plugs (without hose
connection) with new seals (tightening tor-
que (
Y
page 105)).
! Old coolant and corrosion deposits must
be rinsed out thoroughly.
If the cooling system is heavily contamina-
ted, flush it thoroughly before refilling.
Work schedules
75
Notes on maintenance
Z