Maintenance
2751−4/A1
Winterthur Gas & Diesel Ltd.
1/ 2
Grinding the Seating Surface on the Valve Head
Tools:
1 Feeler gauge 94122
1 Tool valve grinding device 94291
1 Template 94292
1. General
Use only the grinding device 94291 (see Fig.
1) to grind the valve head.
You must grind valve heads that have
damage or corrosion on the seating surface.
If the rotation wing is missing from the valve
spindle, do not grind the valve head.
2. Valve head − grinding
1) Read the data in the manufacturer’s
manual for the grinding device 94291.
2) Put the grinding device 94291 in an
area where there is no vibration.
Note: If necessary, put the grinding
device on a rubber mat. This will
help to prevent rough surfaces
during the grinding procedure.
3) Put the valve spindle in position in the
grinding device 94291, see Fig. 1.
4) Put the template 94292 on the valve
head (1), see Fig. 2.
Note: The data shown on the template
94292 shows the maximum limits
for the valve head.
5) Use the feeler gage 94122 to measure
the values.
6) If the values are less than the limits
given, do the procedure that follows:
a) Use the grinding device 94291 to
grind the surface of the valve
head (1). Remove only the
minimum material necessary to
get a smooth, flat surface.
b) Use an applicable coolant to keep
the valve head (1) cool.
c) Keep the angle of the valve head
1 to between 30°18' and 30°20'.
Note: You can grind off a maximum of
3 mm from the seating surface.
7) Do a check of the valve seat and valve
spindle, see 2751−3, paragraph 5.
Exhaust Valve
2015
WCH03263
a
a = between:
30°14' and 30°16'
WCH02980
1
1
Fig. 1
Fig. 2
94292
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