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481
Pfaff 481 Service Manual
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18
13
Timing the bobbin case opener
Requirement
In needle bar position
1.8 mm
past b.d.c. (cylindrical pin in hole “4”) bobbin case
opener finger must be at its
right
point of reversal.
●
Adjust bobbin case opener eccentric
1
(screws
2
) according to the requirement.
Adjustment aid:
To facilitate checking insert a screwdriver in the slot of bobbin case opener
3
.
4
1
2
3
17
19
Table of Contents
Notes on Safety
2
Checking and Adjustment Aid
3
Preliminary Adjustment of the Needle Height
4
Zeroing the Feed Motion
5
Zeroing the Needle Feed Motion (Not Applicable to PFAFF 483)
7
Feed Lifting Motion
8
Feed Dog Height
9
Feed Driving Motion
10
Timing the Needle Feed Motion (Not Applicable to PFAFF 483)
11
Centering the Needle in the Needle Hole
12
Eccentric Hook Shaft Bearing and Hook-To-Needle Clearance
14
Needle Rise, Final Adjustment of Needle Height and Bobbin Case Positioning Finger
15
Vertical Position of Bobbin Case Opener
16
Position of Bobbin Case Opener
17
Timing the Bobbin Case Opener
18
Clearance between Presser Foot and Needle Plate
19
Eliminating Feed Differences (Not Applicable to PFAFF 483)
20
Tension Release Mechanism
21
Thread Check Spring and Thread Regulator
22
Knee Lever Resting Position
23
Knee Lever Play
24
Adjusting the Knee Lever Motion
25
Bobbin Winder
26
Limiting the Stitch Length
27
Matching Forwards and Reverse Stitch Lengths
28
Presser Foot Pressure
29
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Pfaff 481 Specifications
General
Brand
Pfaff
Model
481
Category
Sewing Machine
Language
English
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