Singer 301 301A Sewing Machine Threading Instructions
UPPER THREADING
See Figs. 6 and 7
Raise take-up lever 8 to its highest point,
Place spool of thread on spool pin 1
Lead thread into thread guide 2
Into thread guide 3
Down into thread guide 4
Down, under and from right to left between tension discs 5 Hold spool tightly and pull thread up against ta_ke-up spring 7 until it enters retaining fork 6
Pass thread up into thread guide 4
From right to left through hole in take-up lever 8
Down through eyelet 9
Into wire thread guide 10
Into wire thread guide 11
Into guide 12 on needle clamp
From right to left through eye of needle 13.
Draw about two inches of thread through eye of needle.
Singer 301 301A Sewing Machine Threading Instructions
You can find the complete instruction manual here.