Singer 601 - Page 12

The timing mark on the thread puller action cam X must align with the timing mark orTthe thread puller action
plate V when distance trom top ot needle bar connecting stud, needle bar on its downward stroke, to underside of
aim at needle end is Mi.hmm (2.622 ) in “BD. BF. GD and GF" varieties of 591 D200/2 1 0 /215/240 and 601D
's’.nnt’i.RtvnV "Y B ° ' Y' G ° a " d GF ” Varieties ° f 591D300/3 10/315 machines and 70.0mm
(- ■ 7X s ) in ;>9l D3 18BD/BF machines. (Figs. 76 and 77)
On compound feed machines, the timing mark on the thread puller action cam X must align with the timing mark
on the thread puller action plate Y when distance from top of needle bar connecting stud.^ needle baron its down
stroke, to lower end ot need! bar frame is 81 , 8mm (3.220") in “BD, BF. GD and GF" varieties of 591C200/210/240
( ? ' ° 31 ' " B I X BF - GD andGF ” varieties of 591C300/310 machines and 76.0mm (2.992”) in
591C318BD/BF machines. (Figs. 76 and 78) v
Adjust timing as instructed below.
1. Loosen the two set screws Z holding the thread puller action cam X.
2. Turn machine pulley over toward front of machine until the needle bar go beyond its upper deal point and
descend to the point shown in Fig. 75.
3. T urn thread puller action cam X until its timing mark is aligned with the timing mark on the thread puller action
plate Y and while holding the thread puller action cam X pressed lightly against the tension release action cam B2
firmly tighten the two set screws A2.
TIMING TENSION RELEASE ACTION CAM
The tension release action cam C2 must be set so that the tension release action plate pin D2 is disengaged from
the tension release action cam C2 immediately after thread trimming is completed. (Fig. 79)
fo make this adjustment, follow the instructions noted below.
1. Loosen two set screws A2. Fig. 76 and turn the tension release action cam C2 as required.
2. When correct position has been located, firmly tighten the two set screws A2, Fig. 76 while holding the tension
release action cam C2 pressed lightly against the thread puller action cam X.
CORRECT POSITION OF KNIVES
IMMEDIATELY AFTER THREAD
TRIMMING
Fig. 79
NOTE: When replacing the feed dog with a new one, be sure to check the
and readjust if necessary.
timing of tension release action cam