Maintenance
Drive unit/diesel engine
BA RD18 en 01
137
Correct coolant level: Centre of fill level indicator [2]. Do not exceed
this level!
If there is insufficient coolant, only fill up coolant in the mixing
concentration through filling opening [1] on the compensation tank.
If there is a considerable loss of coolant, determine the cause and
rectify.
4.03.11 Changing the coolant
& Only lubricants with this symbol are permitted ("Technical data",
page 161 et seq.).
Switch off the diesel engine and remove the ignition key.
Open the sealing cap [1] on the compensation tank.
Remove the drain plug [4] from the radiator and discharge the coolant
in a container provided for this purpose.
Remove the lower coolant hose [3] and allow the coolant to drain into
a container provided for this purpose.
Screw the drain plug [4] back on and mount the coolant hose [3] on
pipe brackets.
Open the bleed screw [5] on the radiator by two turns (do not remove
it!).
Open the banjo bolt [6] of the vent line on the engine block by two
rotations (do not remove it!).
Fill the compensation tank [1] with coolant until coolant flows out of
the bleed screw [5] on the radiator.
Tighten the bleed screw [5] on the radiator.
Fill the compensation tank [1] with coolant until coolant flows out of
the banjo bolt [6] on the engine block.
Tighten the banjo bolt [6].
Fill the compensation tank [1] with coolant until it reaches the middle
of the fill level indicator [2].
Close the filling opening with the sealing cap [1].
Start the diesel engine and bring it to operating temperature
(thermostat opens).
Switch off the diesel engine and remove the ignition key.
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