WinGD RT-flex50DF, Maintenance Manual, Page: 227 / 586

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 tool (94291, 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 − Grind
1) Read the data in the manufacturer’s
manual for the tool (94291).
2) Put the tool (94291) in an area where
there is no vibration.
Note: If necessary, put the tool on a
rubber mat. This will help to
prevent rough surfaces during the
grinding procedure.
3) Put the valve spindle in position in the
tool (94291).
4) Put the template (94292, Fig. 2 ) on the
valve head (1).
Note: The data shown on the gauge
(94292) shows the maximum limits
for the valve head.
5) Use the feeler gauge (94122) to
measure the values.
6) If the values are less than the limits
given, do the procedure that follows:
a)
Use the tool
(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
°8' and
30
°10'.
Note: You can grind off a maximum of
3.0 mm from the seating surface.
7) Do a check of the valve seat and valve
spindle, refer to 2721 − 3, paragraph 5 .
Exhaust Valve
2016
94291
WCH03196
a
a = between
30
°8' and
30
°10'
Max. 6.0 mm
WCH03196
Max 3.0 mm
94292
Fig. 1
Fig. 2
1
1