Mercedes-Benz OM 904 LA, Руководство по эксплуатации

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Renewing the coolant
G
WARNING
When opening the coolant expansion tank,
there is a risk of scalding from hot coolant
spraying out. The engine cooling system and
the coolant expansion tank are pressurised
when the engine is at normal operating tem-
perature. Wear gloves and eye protection.
Only open the coolant expansion tank when
the coolant temperature is 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.
Example: coolant drain plug
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 coolant drain
plugs.
X
Place a suitably sized receptacle under-
neath to catch the coolant.
X
Connect the drain hose to coolant drain
plugs
:
on the crankcase.
X
Loosen coolant drain plug
:
and collect
the coolant.
X
If there are additional coolant drain plugs
in the system, open these as well and com-
pletely drain the system.
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
Fit the other drain plugs (without hose con-
nections) with new seals and screw them
in tight. Tightening torque (
Y
page 105).
!
Old coolant and corrosion deposits must
be rinsed out thoroughly.
76
Work schedules
Notes on maintenance