MTU 20 V 4000 G23, Technical Publication

Page: 144 / 178

Task Description 139
6.14.4 Engine coolant level – Check
Preconditions
• Engine is stopped and starting disabled.
• MTU Fluids and Lubricants Specification (A001061/..) is available.
WARNING
Coolant is hot and under pressure.
Risk of injury and scalding!
• Let the engine cool down.
• Wear protective clothing, gloves, and goggles / safety mask.
Coolant-level check at filler neck:
1. Turn breather valve of filler neck on coolant expansion tank counterclockwise to first stop and allow pressure
to escape.
2. Continue to turn breather valve counterclockwise and remove.
3. Check coolant level (coolant must be visible at the lower edge of the cast-in eye).
Coolant-level check at external cooler:
1. Check coolant level (coolant must be visible at
marking plate).
2. If required, top up with treated coolant
( → Page 135).
3. Check and clean breather valve.
4. Set breather valve onto filler neck and close it.
Coolant-level check by means of level sensor:
1. Switch on engine control system and check readings on the display.
2. If required, top up with treated coolant (
→ Page 135).
M015715/00E 06-08 © MTU