Rocker arm axle assembly
1. Knock out the cylindrical locking pin (indicated by the arrow) from one side of the valve rocker arm shaft and remove the spring washer.
2. Remove the rocker arm and rocker arm axle supports. Store them in the proper order for subsequent installation in their original places. If the rocker arm support does not come off, tap it with a soft-faced hammer.
3. Check the rocker shaft and rocker arms for wear. If the surface of the rocker arm that contacts the valve stem is significantly worn, the rocker arm should be replaced. Minor step wear can be eliminated by fine grinding.
4. Lubricate the parts and install them on the corresponding rocker arm axles in their original positions. The mounted rocker arm axles should be positioned so that the lubrication holes are directed downwards towards the cylinder block heads. In doing so, pay attention to the location of the recess (indicated by the arrow) on one end of the rocker arm axle.