Time Between Inspection Or Overhaul & Expected Life Time - Wartsila ?31DF Series Product Manual

4. Description of the Engine
4.3 Time between Inspection or Overhaul & Expected Life
Time
Component
Piston
Piston rings
Cylinder liner
Cylinder head
Inlet valve
Exhaust valve
Main bearing
Big end bearing
Intermediate gear
bearings
Balancing shaft
bearings
Injection valve
(wear parts)
High Pressure fuel
pump
Main gas admis-
sion valve
LP and the HP tur-
bochargers
4-6
● Time Between Overhaul data can be found in Services Engine Operation and
Maintenance Manual (O&MM)
● Expected lifetime values may differ from values found in Services O&MM manual
● Achieved life times very much depend on the operating conditions, average
loading of the engine, fuel quality used, fuel handling systems, performance of
maintenance etc
● Lower value in life time range is for engine load more than 75%. Higher value
is for loads less than 75%
● Based on the fuel quality, intermediate mechanical cleaning might be necessary
Time between inspection or overhaul
MDF/ GAS opera-
tion
32000
32000
32000
32000
32000
32000
32000
32000
64000
32000
8000
24000
16000
16000
1) For detailed information of HFO1 and HFO2 qualities, please see chapter
NOTE
(h)
1)
HFO operation MDF/ GAS opera-
24000
24000
24000
24000 64000...128000
24000
24000
24000
24000
64000
32000
8000
24000
N/A
16000
NOTE
Wärtsilä 31DF Product Guide
Expected life time (h)
HFO operation
tion
Min. 96000 Min. 72000
32000 24000
128000 96000
48000...96000
32000 24000
32000 24000
64000 48000
32000 24000
64000 64000
32000 32000
N/A N/A
24000 24000
16000 N/A
64000 64000
DBAE248994
1)
6.1.2.3