Table Of Contents - Pfaff 481 Service Manual

Contents
Checking and adjustment aid ..................................................................................... 3
1 Preliminary adjustment of the needle height .............................................................. 4
2 Zeroing the feed motion .......................................................................................... 5-6
3 Zeroing the needle feed motion (not applicable to PFAFF 483) .................................. 7
4 Feed lifting motion ..................................................................................................... 8
5 Feed dog height ......................................................................................................... 9
6 Feed driving motion ................................................................................................. 10
7 Timing the needle feed motion (not applicable to PFAFF 483) ................................. 11
8 Centering the needle in the needle hole .............................................................. 12-13
9 Eccentric hook shaft bearing and hook-to-needle clearance ..................................... 14
10 Needle rise, final adjustment of needle height and bobbin case positioning finger .. 15
11 Vertical position of bobbin case opener .................................................................... 16
12 Position of bobbin case opener ................................................................................ 17
13 Timing the bobbin case opener ................................................................................ 18
14 Clearance between presser foot and needle plate ................................................... 19
15 Eliminating feed differences (not applicable to PFAFF 483) ..................................... 20
16 Tension release mechanism .................................................................................... 21
17 Thread check spring and thread regulator ................................................................ 22
18 Knee lever resting position ....................................................................................... 23
19 Knee lever play ......................................................................................................... 24
20 Adjusting the knee lever motion .............................................................................. 25
21 Bobbin winder .......................................................................................................... 26
22 Limiting the stitch length .......................................................................................... 27
23 Matching forwards and reverse stitch lengths ......................................................... 28
24 Presser foot pressure .............................................................................................. 29
30