Wartsila RT-flex50-D User Manual

Maintenance
2751−4/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 2
Tools:
1 Feeler gauge 94122
1 Valve grinding device 94291
1 Gauge 94292
1. General
Grinding in a valve together with its valve seat with grinding paste is not permitted.
Valves which have had the seating surfaces badly damaged by pitting or corrosion
have to be reground by machine. It is strongly recommended that a suitable grind-
ing machine 94291 be made available.
Remark: A valve spindle with missing rotation wing may not be reground. The
wing hub must be shrink-fitted on the valve shaft by heating it to 480 _C. Grinding
may first begin after the whole unit has cooled down.
The machines from the makers HUNGER and CHRIS - MARINE are well proven
for valve grinding and can also be ordered directly from Wärtsilä Switzerland Ltd,
Winterthur.
2. Grinding the seating surface
D Only as little material as necessary should b
e
ground off the valve seating surface to provide
a
clean and smooth finished surface.
Only grind with cooling (wet).
D In order to avoid the appearance of chatter mark
s
on the seating surface, the grinding machin
e
should be placed in an area which is free of vibra
-
tion from running machinery or engines, etc.
If
necessary the grinding machine should be stoo
d
on a rubber mat.
Remark: For the application of the grinding device re
-
fer to the operating instructions.
A
a
016.744/08
SEATING SURFACE
ANGLE ON VALVE
94291
+8’
a = 30 _
+10’
E
xhaust Valve
G
rinding the Seating Surface on the Valve Head
2010-08

Wartsila RT-flex50-D Specifications

General

Brand	Wartsila
Model	RT-flex50-D
Category	Engine
Language	English