Engine Coolant - Level Check - MTU 12V4000M73 series Operating Instructions Manual

7.16.2 Engine coolant – Level check
Preconditions
☑ Engine is stopped and starting disabled.
☑ MTU Fluids and Lubricants Specifications (A001061/..) are 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.
Checking coolant level at filler neck:
1. Turn cap on coolant expansion tank counterclockwise to the first stop and allow pressure to escape.
2. Continue to turn cap counterclockwise and remove.
3. Check engine coolant level (engine coolant must be visible at bottom edge of cast-in eye of filler neck).
Checking coolant level at exter-
nal cooler:
Note: Engine coolant must be visible at marker
plate.
1. Check engine coolant level.
2. Top up engine coolant as necessary
(→ Page 232).
3. Check and clean cap.
4. Place cap on filler neck and close.
Checking coolant level with level sensor:
Note: Engine coolant level is automatically monitored by the engine control system.
1. Switch on engine control system and check readings on the display.
2. Top up engine coolant as necessary (→ Page 232).
228 | Coolant System, General, High-Temperature Circuit | MS150045/03E 2018-08