Coolant Pump – Relief Bore Check - MTU 12 V 2000 P12 Operating Instructions Manual

7.15.6 Coolant pump – Relief bore check
DANGER
Unguarded rotating and moving engine components.
Risk of serious injury – danger to life!
• Take special care when working on a running engine.
WARNING
Engine noise above 85 dB (A).
Risk of damage to hearing!
• Wear ear protectors.
Coolant pump – Relief bore check
1. Check relief bore for oil and water dis‐
charge.
2. Permissible discharge:
• Up to 10 drops of coolant per hour
• Up to 5 drops of oil per hour
3. If discharge exceeds the specified limits,
contact Service.
4. If relief bore is dirty:
a) Stop engine (→ Page 55) and disable
engine start.
b) Clean relief bore with a wire.
c) Start the engine (→ Page 52) and oper‐
ate it at idle speed for some minutes.
d) Check relief bore again for oil and cool‐
ant discharge.
136 | Task Description | MS150025/02E 2012-10