How to take bumping clearance?

1.     Stop the compressor and (lock off) take out fuse.

2.     Drain the cooling water.

3.     Remove the cylinder cover.

4.     Clean the cylinder head face and piston crown.

5.     Place the lead wire ball on the top face of the piston. That is larger size than expected by clearance.

6.     Cylinder cover is placed on the cylinder with correct joint thickness and tightens the head bolts.

7.     Turn the compressor slowly by hand over top centre so that lead wire ball is pressed.

8.     Then remove cylinder cover again.

9.     Remove the compressed lead wire ball.

10. Take the measurement of lead wire thickness by using micrometer.