4.4 Overhaul inter vals and expected life times
The following component lifetimes are for guidance only. Actual figures will be different
depending on operating conditions, average loading of the engine, fuel quality used, fuel
handling system, performance of maintenance etc.
Expected component lifetimes have been adjusted to match with Time between overhaul data.
Table 4-1 Expected times between overhauls (TBO) and expected lifetimes (ELT)
Expected life time (h)
LFO/HFO operation
Maintenance interval (h)
LFO/HFO operation
Expected lifetime (h)
LFO/GAS operation
Maintenance interval (h)
LFO/GAS operation
Component
36000160003600020000- Big end bearing
6000012000 (HFO2)
16000 (HFO1)
60000...7200018000...20000- Cylinder head
1800001600018000024000- Cylinder liner
12000...1800012000...180003600012000...18000- Exhaust valve
320008000- Inj. valve complete ² ) ³)
8000800080008000- Injection nozzles ¹ )
2400012000 (HFO2)
16000 (HFO1)
--- Injection pump (Twin
Pump)
20000 (LFO)
24000240002400024000- Injection pump, pilot
2400012000...180003600012000...18000- Inlet valve
36000240003600024000- Main bearing
--1800018000- Main gas admission
valve
3600016000 ¹) / 24000 ²)12000024000 ¹) / 48000 ²)- Piston
16000160002400024000- Piston rings
NOTE
1) Inspection of one
2) Inspection of all
3) 3000 hours maintenance interval in the first installation required, Needle Operating
Pressure (NOP) test to be performed
4.5 Engine storage
At delivery the engine is provided with VCI coating and a tarpaulin. For storage longer than 3
months please contact Wärtsilä Finland Oy.
4-8 DBAD209883
Wärtsilä 46DF Product Guide4. Description of the Engine
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