Elna 683-686 Sewing Machine Service Manual Plus Parts
* Needle bar height.
* Feed dog lift.
* Projection of the upper looper.
* Radius of the lower looper.
* Needle bar timing.
* Thread tension.
* Feed dog height.
* Upper and lower looper take up lever.
* Needle guard.
* Presser bar height.
* Timing between upper and lower looper.
* Frame dismantling including: Bulb cover, front panel, belt cover,
back cover plus extension table.
20 page service manual.
Also includes 16 page parts diagram manual including parts list.
This is a service and parts manual only. If you need the instruction manual, you can find one here.