PROCEDURE
1 Put the template (001, Figure 13-5) on the back of the emery cloth (002).
2 Use the applicable grade of the emery cloth related to the quantity of metal you want to
remove.
3 Use a pencil or a ball pen to make the inner shape.
4 Cut out accurately the shape.
5 Remove the four screws (006) and the grinding tool (94841).
6 Apply Molyslip Copaslip paste to the threads and faces of the four screws (006).
7 Remove the cover (008).
8 Put the emery cloth shape into the grinding tool (004).
9 Put the grinding tool (004), emery cloth and the cover (008) in position on the hydraulic
pipe (003).
10 Torque symmetrically the four screws (006) to 2.0 Nm.
11 Put the hydraulic pipe (003) in a vice, as vertically as possible.
12 Adjust the speed of the hand drill to between 200 rpm and 500 rpm.
13 Align the hand drill and the grinding tool (004) accurately with the hydraulic pipe (003)
as shown.
14 Apply a light pressure and start grinding.
15 Regularly remove the unwanted material from the grinding tool (004).
16 Make sure that the circular marks around the sealing face of the pipe are concentric.
17 Change the emery cloth for a smoother grade, then do Step 1 to Step 16 again until you
get a smooth finish.
18 Replace the emery cloth with a polishing cloth as a last step to polish the hydraulic pipe
(003).
19 Clean the hydraulic pipe (003).
X72DF
AA00-8460-00AAA-655A-A
Maintenance Manual Hydraulic pipe exhaust valve - grind the sealing face
Winterthur Gas & Diesel Ltd.
- 737 - Issue 002 2020-10
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