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Singer 620 Service Manual page 3

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INDEX
Bobbin Driver
Adjustment....
Removal and Replacement..—.
Bobbin Push-Button
Removal and Replacement__—.---
Chainstitch Adjustments.........
Hinge Assembly...-.
Hoolc, Rotating
Positioning...-.
Removal.
Replacing...-.
Timing...
Inspection and Lubrication...—.....
Needle-Threader Storage and Use...
Selector Systems
Release Mechanism.. .....—-
The Cam Stack...-.-
Bight-Amplitude and Pattern Selector.
Needle-Bar Driving Arm.
Tension, Needle Thread
Adjustment.
Removal and Disassembly.
Reassembly and Reolacement.
Throat-Plate Position Bracket
Remove i ana R ss icc oment.
Winding Mechanism.
•Viring Dicgram.
9
9
9
20
5
8
6
6
7
3
22
12
14
17
19
10
10
10
PROPERTY OF
THE SINGER COMPANY
This is a private and confidential communication to and for the use only
of the employees of The Singer Company and its affiliated companies.
Reproduction, sale, distribution, or publication thereof to the public is
forbidden.
2

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