WinGD X62DF - Valve Seat - Lap

12.6 Turn the rod (001) back to release the tension in the spring (006).
12.7 Remove the dismantling and assembling tool and the bracket from the bush
(007).
12.8 Remove the cover and the spring.
13 Lap the valve seat as follows:
13.1 Remove the valve spindle (004).
13.2 Apply lubricating oil to the valve spindle (004).
13.3 Put the valve spindle (004) into the valve guide (003).
13.4 Attach the handle (001) to the valve spindle (004).
13.5 Apply oil base lapping paste of corn size between 0.5 microns to 4.0 microns to
the valve seat.
13.6 Turn the handle clockwise and counterclockwise some times.
13.7 Remove the handle (001) from the valve spindle (004).
13.8 Remove the lapping paste from the valve seat.
Fig 7-21 Valve seat - lap
14 Assemble the spring as follows:
14.1 Put the cover and the spring in position.
14.2 Install the dismantling and assembling tool to the bush (007).
14.3 Install the bracket (015) to the bush (007) with the screws (009).
14.4 Turn fully in the special screw (008).
14.5 Turn the rod (001) to compress the spring (006).
14.6 Attach the valve cotter (003) to the valve spindle (011).
X62DF
AA00-2140-00AAA-362A-A
Maintenance Manual Gas admission valve - do a check for gas leakage
Winterthur Gas & Diesel Ltd.
- 212 - Issue 002 2020-10