3.
Open vent points on intercooler, exhaust tur-
bochargers, and on plate-core heat exchang-
er (arrowed).
4.
Fill coolant through filler neck on expansion
tank.
5.
When coolant escapes at the vent points,
close vent points one by one, proceeding
from the lowest point upwards.
6.
Fill expansion tank until overflow edge is
reached.
7.
Start engine with open expansion tank
(→ Page 72) and operate it in idle mode.
8.
Open vent points one by one, starting at the
lowest point and proceeding upwards.
9.
Close vent points.
10.
Fill expansion tank until overflow edge is
reached.
11.
When coolant temperature (T-Coolant)
reached 40 °C, increase the engine speed to
1000 rpm for approx. 2 minutes.
12.
With the engine idling, fill expansion tank un-
til overflow edge is reached.
13.
With the expansion tank open, run the engine
up to nominal speed (full load) under load.
14.
Leave the engine idling for approx. 5 minutes
until the coolant temperature stabilizes.
15.
Check coolant level in expansion tank:
• Level ≥ 50%: Close valve cover.
• Level ≤ 50%: Stop engine and fill expan-
sion tank until overflow edge is reached.
16.
Close valve cover on expansion tank and run
engine up to full load again.
17.
After the engine has cooled down, top up
coolant up to overflow edge in expansion
tank.
18.
Check proper condition of valve cover and
clean sealing faces if required.
19.
Fit and close valve cover on expansion tank.
Variant 2: Filling with coolant
using a pump
1.
Connect appropriate pump (pressure at least
0.5 bar) with hose to filling connection (ar-
rowed) on A side or B side. Alternatively:
204 | Coolant System, General, High-Temperature Circuit | MS150046/03E 2018-08
TIM-ID: 0000014571 - 005
Summary of Contents for 20V4000M73 series
Page 1: ...Operating Instructions Diesel engine 20V4000M73x MS150046 03E...
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