MTU 20 V 4000 G23 Technical Publication page 141

136
Filling coolant with pump
1. Connect appropriate pump with hose to drain
valve.
2. Open drain valve and pump coolant into engine
at 0.5 bar minimum.
3. Fill expansion tank until overflow edge is reached.
4. Close drain valve.
5. Check proper condition of breather valve, clean
sealing faces if required.
6. Set breather valve onto filler neck and close it.
7. Start engine (→ Page 49).
8. After the engine has run at unloaded condition for
10 seconds, stop engine (→ Page 52).
9. Turn breather valve of filler neck on coolant
expansion tank counterclockwise to first stop and
allow pressure to escape.
10. Continue to turn breather valve counterclockwise
and remove.
11. Check coolant level (→ Page 139) and top up if
required:
11.1. Fill in coolant in expansion tank until the
coolant level at top edge of filler neck
remains constant.
11.2. Set breather valve onto filler neck and
close it.
11.3. Repeat the steps from "Start engine" →
7. until coolant is no longer needed to be
topped up.
11.4. Disconnect pump and hose.
Filling coolant through filler neck
1. Alternatively: Fill in coolant in expansion tank until the coolant level at top edge of filler neck remains constant.
2. Check proper condition of breather valve, clean sealing faces if required.
3. Set breather valve onto filler neck and close until first stop is reached.
4. Start engine (→ Page 49).
5. After the engine has run at unloaded condition for 10 seconds, stop engine (→ Page 52).
6. Turn breather valve counterclockwise and remove.
7. Check coolant level (→ Page 139) and top up if required:
7.1. Repeat the steps from "Start engine" → 4. until coolant is no longer needed to be topped up.
7.2. Check proper condition of breather valve, clean sealing faces if required.
7.3. Set breather valve onto filler neck and close it.
Final steps
1. Start the engine and operate it at unloaded condition for some minutes.
2. Check coolant level (→ Page 139) and top up if required.
M015715/00E 06-08
Task Description
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