Man D2868 LE426, Operating Instruction

Page: 88 / 134

Maintenance and Care
MAN marine diesel engines D2868 LE4.. / D2862 LE4..
86
Carefully read through the Operating Instructions before starting any work!
This particularly applies to the General Safety Instructions section
and the safety instructions in the various chapters.
8.4.4 Changing the coolant
WARNING
Risk of injury due to hot fluid
Coolant reaches high temperatures during operation and causes scalding if touched.
For this reason:
S
Always wear protective gloves when holding the coolant drain plug.
User tip
Use a container with a capacity of at least 100 litres when changing the coolant.
ENVIRONMENTAL NOTE
Dispose of refrigerant and refrigerant oil correctly.
Draining the cooling system
Only drain the cooling system when the
engine
has cooled down as follows:
S
Open the cover
1
of the filler neck onthe
expansion tank.
S
Unscrew the protective cap from the drain/filler
valve
2 .
S
Connect the hose
3
of the pump at the drain/
filler valve 2 .
S
Hang the hose
4
of the pump into a collecting
container
S
Switch on the pump and pump out the coolant .
S
Switch off the pump.
S
Disconnect the hose
3
of the pump from the
drain/filler valve 2 .
S
Screw the protective cap onto the drain/filler
valve
2
.