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Sewing Machine
438 Series
Pfaff 438 Series User Manual
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25
Lubrication
of
zigzag
eccentric
25.1
Fill
the
zigzag
eccentric
housing
with
abt.
75
c.c.
of
oil.
Note:
Only
use
Pfaff
sewing
machine
oil
having
a
mean
viscosity
of
22.0
mm^/s
at
40°C
and
a
density
of
0.865
gW
at
15°C
(No.
280-1-120144).
25.2
Clean
the
gasket
face
on
the
cover
of
the
zigzag
eccentric
housing
and
the
gasket
of
this
cover.
.3
Screw
on
the
cover,
making
sure
that
the
needle
bar
lubricating
wick
is
still
positioned
in
the
hole
of
the
sealer
plate.
39
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
40
42
Table of Contents
Table of Contents
2
Preparations for Adjusting
4
Centring the Needle in the Needle Hole (in Sewing Direction)
7
Setting the Stabilizing Rod Parallel to the Needle Bar
8
Stitch Width Control
10
Zeroing the Needle for Straight Stitching
10
Stitch Width Scale
11
Limiting the Maximum Stitch Width
12
Adjustung the Locking Lever
13
Adjusting the Needle Inthe Needle Hole (Sideways)
14
Adjusting the Needle Throw
15
Needle Position "Left, Centre, Right
16
Adjusting the Needle Position Lever
18
Adjusting the Stitch Length Scale Ring
19
Adjustment with Closed Gearcase
20
Zeroing the Bottom Feed
20
Adjustment with Open Gearcase
21
Adjusting the Bottom Feed Driving Motion
22
Bottom Feed Lifting Motion 21+22
23
Tensloning the Driving Belt in the Gearcase
25
Adjusting the Hook Bearing Bracket
26
Preliminary Adjustment of Needle Bar Height
27
Oil Distributor Ring
28
Hook Timing and Hook-To-Needle Clearance
29
Final Adjustment of Needle Bar Height
30
Bobbin Case Opener
31
Position of Bobbin Case Opener 29+30
31
Timing the Bobbin Case Opener
33
Adjusting the Slack Thread Control
34
Clearance between Presser Foot and Needle
35
Feed Dog Height 34+35
36
Oil Check Valve
38
Tension Release Mechanism 37+38
39
Lubrication of Zigzag Eccentric
41
Hook Lubrication
42
Knee Lever Stroke Limitation
43
Knee Lever Play
44
Bobbin Winder
45
Presser Foot Pressure
46
Thread Check Spring and Thread Regulator
46
Annex for Machines Equipped with Zigzag Control -716
47
Needle Vibration
47
Left, Center and Right Needle Positions 46+47
48
Needle Position Lever 48+49
50
5
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Pfaff 438 Series Specifications
General
Brand
Pfaff
Model
438 Series
Category
Sewing Machine
Language
English
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