In this post, spindle bearing replacement for HSD ES 368L spindle described.
A similar spindle, ES 369L, repair process shown in other post here
The main difference between this spindle and ES 369L was the speed encoder.
Because of that, we had to open the spindle top first and remove the magnetic sensor gear, without touching the reader itself. Please pay attention to spindle sensor and move them away before pulling the gear out.
This spindle has 2 big 50BNR19H like and 2 small 7006 like bearings. HY KH 61910 2RZ for bottom and KH 6006 2RZ for top were originally used.
On this ES 368L spindle needs 2 bearings bottom and 2 for top, but ES 369L had 4 for bottom and 2 for top, because of lighter load for aluminium milling.