4.4
Overhaul intervals and expected life times
The following overhaul intervals and lifetimes are for guidance only. Achievable lifetimes depend
on operating conditions, average loading of the engine, fuel quality used, fuel handling system,
performance of maintenance etc.
Expected lifetime is different depending on fuel used. For detailed information on fuel qualities,
please see Table Heavy fuel oils.
Table 4-1
Time between Overhaul
Time between inspection or overhaul (h)
Component
HFO2 operation
HFO1 operation
LFO operation
Twin pump fuel injection
- Injection nozzle
12000
12000
12000
- Injection pump element
12000
16000
20000
Cylinder head
- Inlet valve seat
- Inlet valve, guide and rotator
- Exhaust valve seat
- Exhaust valve, guide and rotator
Piston crown, including recondition
Piston skirt
12000
16000
20000
- Piston skirt/crown dismantling one
24000
28000
32000
- Piston skirt/crown dismantling all
Piston rings
12000
16000
20000
Cylinder liner
Antipolishing ring
12000
16000
20000
Gudgeon pin, inspection
12000
16000
20000
Gudgeon pin bearing, inspection
Big end bearing
12000
16000
20000
- Big end bearing, inspection of one
36000
36000
36000
- Big end bearing, replacement of all
Main bearing
12000
16000
20000
- Main bearing, inspection of one
36000
36000
36000
- Main bearing, replacement of all
Camshaft bearing
36000
36000
36000
- Camshaft bearing, inspection of one
60000
60000
60000
- Camshaft bearing, replacement of all
12000
12000
12000
Turbocharger inspection, cleaning
6000
6000
6000
Charge air cooler
Rubber elements for flexible mounting
Table 4-2
Expected Life Time
Expected life time (h)
Component
HFO2 operation
HFO1 operation
LFO operation
Twin pump fuel injection
6000
6000
6000
- Injection nozzle
24000
24000
24000
- Injection pump element
60000
60000
60000
Cylinder head
DAAB605814
4-7
4. Description of the Engine
Wärtsilä 46F Product Guide
Summary of Contents for 46F Series
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