INDEX
WHAT TO DO WHEN ...................................................................................................... 1-5
SERVICE ACCESS
Face plate unit and belt cover ....................................................................................... 6
Machine base ................................................................................................................ 7
Side cover ..................................................................................................................... 8
Looper cover unit .......................................................................................................... 9
Front panel unit ........................................................................................................... 10
MECHANICAL ADJUSTMENT
Gauge for servicing ................................................................................................ 11-12
Needle bar height ........................................................................................................ 13
Presser bar height ...................................................................................................... 14
Feed dog height .......................................................................................................... 15
Feed timing ................................................................................................................. 16
Upper knife timing ....................................................................................................... 17
Lower looper height .................................................................................................... 18
Clearance between needles and lower looper / needle guards ............................ 19-20
Clearance between needle and the fixed needle guards ............................................ 21
Lower looper timing .................................................................................................... 22
Upper looper position .................................................................................................. 23
Upper & lower loopers timing ...................................................................................... 24
Clearance between loopers ........................................................................................ 25
Clearance between needle and upper looper ............................................................. 26
Position of knives ........................................................................................................ 27
Replacement of knives ............................................................................................... 28
Position of looper thread guides .................................................................................. 29
Differential feed ratio ................................................................................................... 30
Clearance between main & sub feed dogs ................................................................. 31
Stitch length ................................................................................................................ 32
Play of main shaft ....................................................................................................... 33
Belt tension ................................................................................................................. 34
Replacement of motor ................................................................................................ 35
Replacement of lamp .................................................................................................. 36
Oiling ................................................................................................................................ 37
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