Singer 620 - Page 23

TROUBLE-SHOOTING GUIDE (Cont'd.)
Remove bottom cover and check that the feed-lift
and feed-rock-throw eccentrics- are correctly assem¬
bled in the machine.
(Lay the machine on its back, panel facing up¬
wards- Rotate the hand wheel until needle is at its
lowest point. The hook point will be near the posi¬
tion finger at the lowest point. In this position, both
throws should be down. If the throws are not down,
reposition as described on pages 13 and 14 of Service
Manual for Class 600 and 603 Machines.)
Check chainstitch performance.
With the bottom cover removed, install a No. 18
needle, and rotate the hand wheel until the needle
bar is at its lowest position, then continue to rotate
until the hook point is directly behind the needle.
Loosen the pull-off finger hinge-screw nut and the
hinge-screw, allowing the pull-off finger to move
freely. Allow the pull-off finger to rest lightly on the
needle; then, holding the nut in position, tighten the
screw.
CAU7ICN: Raise ana lower 'he needle bar by ro¬
tating *he hana wheel forward and back *o
?n s l r s t. d t n ■ i cr*.? 3n in5 ms 3 c r 9 w, ms
cu:!-orf ‘incer vcs ~c: cjusc :ccx :gc:ns;
me deeaie, ecus me *0 dense: deems:
the Hook point, rioia the screw tignt and
draw up the lock nut. Repeat the precau¬
tionary check above, to be sure the pull-
off finger does not deflect the needle. Re¬
place bottom cover.
trademark medallion
Check chainstitch performance.
Trademark Medallion
The trademark medallion on the upright arm can
be removed easily in order to gain access to the
panel and screws. Gently pry the medallion from the
arm with a protected screw-driver point or other long,
slender instrument.
To replace, position stud over hole and gently
ease medallion back into position.
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