MTU M015710/04E Operating Instructions Manual page 166

Alternatively: Filling with coolant
through filler neck
1. Undo the vent line union at the distributor
piece (arrowed).
2. Top up coolant in expansion tank via filler
neck until coolant level at top edge of filler
neck remains constant.
3. Tighten the union (arrowed) if coolant leaks
out at the loose union.
4. Check proper condition of breather valve on
coolant expansion tank, clean sealing faces
if required.
5. Fit breather valve and close it.
6. Start engine (→ Page 69).
7. After 10 seconds of running the engine
without load, shut down the engine
(→ Page 73).
8. Turn breather valve of coolant expansion
tank counterclockwise until the first stop
and allow pressure to escape.
9. Turn breather valve counterclockwise and
remove.
10. Check coolant level (→ Page 176) and top
up with coolant through the filler neck if re‐
quired:
a) Top up coolant in expansion tank via
filler neck until coolant level at top edge
of filler neck remains constant.
b) Fit breather valve and close it.
11. Repeat the steps from "Start engine"
(→ Step 6) until coolant is no longer needed
to be topped up.
Final steps
1. Start the engine and run it without load for some minutes.
2. Check coolant level (→ Page 176) and top up engine coolant as required.
M015710/04E 2012-09 | Task Description | 181