PROCEDURE
1 Make sure that the stop sleeve (009, Figure 7-38) is attached to the spindle (010) of the
grinding device (001).
2 Use the applicable grade of emery cloth related to the quantity of metal you want to
remove.
3 Put the stencil (003) on the emery cloth.
4 Use a pencil or a ball-point pen to make the inner shape (004).
5 Cut out accurately the shape (004).
6 Attach the shape (004) to the grinding device (001) with the clamp (006) and the Allen
screw (005).
7 Torque the Allen screw (006).
8 Attach the grinding device (001) to the prechamber (007) with the two bolts (002).
9 Attach an electric drill to the spindle (010).
10 Operate the electric drill at a maximum speed of 500 rpm.
11 Apply a light pressure and start grinding.
12 Regularly remove the unwanted material from the grinding device (001) and the bore
(008).
13 Make sure that the circular marks around the sealing face are concentric.
14 Change the emery cloth for a smoother grade, then do Step 2 to Step 13 again until you
get a smooth finish.
15 Remove the grinding tool (001).
16 Clean the bore (008).
Fig 7-38 Grind the sealing face for prechamber
001
002
002
003
004005006
008
007
010
009
X72DF
AA00-2708-00AAA-655C-A
Maintenance Manual Cylinder cover - grind the sealing face for prechamber
Winterthur Gas & Diesel Ltd.
- 249 - Issue 002 2020-10
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