MTU 20 V 4000 M93 Operating Instructions Manual page 125

Filling with coolant using a pump
1. Connect appropriate pump with hose to fill‐
ing connection (arrow) on A side or B side.
Alternatively:
2. Connect a suitable pump with a hose to
drain valve (arrowed).
3. Pump coolant into engine at 0.5 bar mini‐
mum until coolant emerges from the loos‐
ened unions at the coolant distributor.
4. Tighten the union for coolant line at the
coolant distributor (→ Page 120).
5. Fill expansion tank until overflow edge is
reached.
6. Check proper condition of breather valve
and clean sealing faces if required.
7. Place breather valve on filler neck and
close.
8. Continue filling process until coolant emerg‐
es from the loosened unions at the two tur‐
bochargers.
9. Tighten the coolant line union on both tur‐
bochargers (→ Page 120).
10. Start engine (→ Page 53).
11. After the engine has run at idling speed for
10 seconds, stop engine (→ Page 61).
12. Turn breather valve of coolant expansion
tank counterclockwise to first stop and allow
pressure to escape.
13. Continue to turn breather valve counter‐
clockwise and remove.
14. Check coolant level (→ Page 121) and top
up engine coolant as required:
a) Fill in coolant in expansion tank until the
coolant level at top edge of filler neck
remains constant.
b) Place breather valve on filler neck and
close.
c) Repeat the steps from "Start engine"
(→ Step 10) until coolant no longer
needs to be topped up.
d) Disconnect pump and hose.
MS150048/03E 2012-07 | Task Description | 125