CONTENTS
I.
STANDARD
ADJUSTMENTS
1
II.
MEASURES
TO
ELIMINATE
STITCHING
FAILURES
12
(1) Thread escape 12
(2) Thread breakage 14
(3) Thread trimming failure 17
(4) Needle breakage 18
(5) Precautions when sewingsynthetic materials 19
(6) Loose stitching 19
III.
THINGS
TO
BE
NOTED
WHEN
DISASSEMBLING
AND
ASSEMBLING
THE
MACHINE
20
(1) How to remove the shuttle driver shaft 20
(2) How to remove the main shaft 20
IV.
ELIMINATION
OF
EXCESSIVE
PLAY
20
(1) Excessiveplay in the main shaft 20
(2) Excessive play
of
the feed cam driving worm against the feed cam driving worm wheel 21
(3) Excessive play
of
the feed cam roller 21
(4) Excessive play in the shuttle driver shaft 21
(5) Cork linings
ia
the clutch components 21
V.
DETAILS
OF
ADJUSTMENT
22
(1) Adjustment for starting and stopping 22
(2) Adjustment
of
the pedal pressure decreasing unit 27
(3) Adjustment
of
the thread trimmer components 29
(4) Feed cam components 30
(5) Adjustment
of
the shuttle race 31
(6) Height
of
the work clamp foot 32
(7) Height
of
the wiper 32
(8) Checking the safety device 32
(9) Adjustment
of
the bobbin winder 33
(10) Tension
of
the V-belt 33
(11) Silicone oil lubricator 33
(12) Application
of
"lock-tight" paint 33
(13) Greasing 34
(14) Replacement parts 36
VI.
HINTS
ON
SUBCLASS
MODEL
MODIFICATIONS
38
VII.
UTILIZATION
OF
SPECIAL
COMPONENTS
41
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