MTU 12 V 2000 P12 Operating Instructions Manual page 62

Engine does not reach rated speed
Component
Fuel supply
Air supply
Fuel injection equip‐
ment
Engine wiring
Engine
Engine speed not steady
Component
Fuel injection equip‐
ment
Speed sensor
Fuel system
Engine governor
Charge-air temperature too high
Component
Engine coolant
Intercooler
Engine room
Charge-air pressure too low
Component
Air supply
Intercooler
Exhaust turbocharger Faulty
Coolant leaks at intercooler
Component
Intercooler
62 | Troubleshooting | MS150025/02E 2012-10
Cause
Fuel inlet blocked
Fuel prefilter clogged
Easy-change fuel filter contaminated
Air filter clogged
Injector faulty
Injection pump defective
Faulty
Overloaded
Cause
Injector faulty
Injection pump defective
Faulty
Air in fuel system
Faulty
Cause
Engine coolant treatment incorrect
Contaminated
Air-intake temperature too high
Cause
Air filter clogged
Contaminated
Cause
Leaking, major coolant discharge
Measure
Completely open shutoff valve up‐
stream of fuel prefilter.
Replace (→ Page 117).
Replace (→ Page 110).
Check signal ring position of contami‐
nation indicator (→ Page 121).
Replace (→ Page 102).
Replace (→ Page 98).
Check (→ Page 144).
Contact Service.
Measure
Replace (→ Page 102).
Replace (→ Page 98).
Contact Service.
Vent fuel system (→ Page 109).
Contact Service.
Measure
Check (MTU test kit).
Contact Service.
Check fan;
check air inlet/outlet ducts.
Measure
Check signal ring position of contami‐
nation indicator (→ Page 121).
Contact Service.
Contact Service.
Measure
Contact Service.