Pfaff 441-O - Page 33

21 Final worksteps
21.1 Screw on the two covers on the back of the machine arm.
21.2 Replace the left upper plastic plug on the back of the arm standard.
21.3 Screw on the face cover.
21.4 Make a sewing test and at the same time turn regulating screw 4 (Fig. 9.0.1) to adjust the
presser foot pressure so that the fabric is fed properly even at top speed.
CONTENTS
1 Scale ringinreverse-feedcontrol
2 Zeroing the bottomfeed
3 Bottom feed driving motion
4 Lower
needle bar driving crank
5 Counter-balance
6 Bottom feed liftingmotion
7 Clearancebetweenpresserfootand needleplate
8 Feed dog height
9 Centering the needlesinthe needle holes
10 Preliminary adjustmentof needle bar height
11 Hook timing, hook-to-needle clearanceand needle barheight
12 Bobbin case openers
13 Oil check valve
14 Tension release mechanism
15 Knee leverplay
16 Knee lever stroke limitation
17 Most favourable knee leverposition
18 Hook lubrication
19 Bobbin winders
20 Thread check spring
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From the library of: Superior Sewing Machine & Supply LLC