Maintenance2751−4/A1
Winterthur Gas & Diesel Ltd.
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8) If the measured values are more than the limits given on the gage 94122, you can
repair the valve spindle (see the data below).
9) If more than 3 mm is ground off, do the procedure that follows:
d) Use a build-up welding procedure to repair the valve seating surface.
e) Grind the seating surface of the valve spindle again (see paragraph 2).
3. Corrosion
Corrosion can occur at the bottom of the valve plate when engines operate for a long
time (e.g. in rough weather conditions).
If the corrosion is less than or equal to 12 mm (see Fig. 2), the valve spindle can be
repaired.
Note: The repair procedure can only be done in a Wärtsilä Switzerland Ltd
authorized repair workshop.
Valve spindles cannot be repaired when the corrosion is more 12 mm, but can
continue to operate until the corrosion has a depth of 25 mm.
Exhaust Valve: Grinding the Seating Surface on the Valve Head
2015
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