MTU 12 V 4000 G73 Operating Instructions Manual page 152

Alternatively: Filling coolant
through filler neck
1. Open venting point at distributor (arrow).
2. Fill in coolant in expansion tank via filler
neck until coolant level at top edge of filler
neck remains constant.
3. Close venting point when coolant emerges.
4. Check proper condition of breather valve,
clean sealing faces if required.
5. Set breather valve onto filler neck and turn
until the first stop.
6. Start engine (→ Page 31).
7. After the engine has run at unloaded condi-
tion for 10 seconds, stop engine
(→ Page 34).
8. Turn breather valve counterclockwise and
remove.
9. Check coolant level (→ Page 147) and top
up coolant as required:
a) Repeat the steps from "Start engine"
(→ Step 6) until coolant no longer
needs to be topped up.
b) Check proper condition of breather
valve, clean sealing faces if required.
c) Place breather valve on filler neck and
close.
Final steps
1. Start the engine and operate it unloaded for some minutes.
2. Check coolant level (→ Page 147) and top up if required.
152 | Task Description | MS150029/02E 2013-03