CONTENTS
TROUBLESHOOTING ...........................................................................................
1–3
SERVICE ACCESS
FACE COVER / TOP COVER ..............................................................
4
BELT COVER .......................................................................................
5
BASE ....................................................................................................
5
FRONT COVER ....................................................................................
6
MECHANICAL ADJUSTMENT
TOP TENSION .....................................................................................
7
BOBBIN TENSION ...............................................................................
8
PRESSER BAR HEIGHT AND ALIGNMENT .......................................
9
NEEDLE SWING ..................................................................................
10
NEEDLE DROP ....................................................................................
11
CLEARANCE BETWEEN NEEDLE AND HOOK (NO. 1) .....................
12
CLEARANCE BETWEEN NEEDLE AND HOOK (NO. 2) .....................
13
FEED DOG HEIGHT ............................................................................
14
NEEDLE BAR HEIGHT ........................................................................
15
NEEDLE TIMING TO SHUTTLE ..........................................................
16
BUTTONHOLE FEED BALANCE .........................................................
17
FEED BALANCE ON STRETCH STITCH ............................................
18
BARTACK FEED OF BUTTONHOLE ...................................................
19
DISENGAGEMENT OF CAM FOLLOWER ..........................................
20
NEEDLE SWING IN STRAIGHT STITCH SEWING .............................
21
BUTTONHOLE LENGTH ......................................................................
22
MOTOR BELT TENSION .....................................................................
23
WIRING
..............................................................................................................
24
Summary of Contents for 415
Page 1: ...SERVICING MANUAL 419S 423S 415...
Page 26: ...24 WIRING FOR 110 120V FROM LAMP SOCKET FROM MOTOR FROM MOTOR FROM LAMP SOCKET FOR 220 240V...
Page 27: ...PARTS LIST MODEL 423S 419S...
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