Parallel Guiding Of The Needle Bar - Pfaff 939 U Adjustment Manual

1

Parallel guiding of the needle bar

.05.03
Requirement
Guide bar 5 must be parallel to the needle bar.
4
3
6
5
Fig. 1 - 04
● Bring the needle bar to tdc (hole 2).
● Loosen screws 1,2 and nut 3.
● The largest eccentricity of pin 4 must be facing downwards.
● Bring the groove on guide bar 5 into a position in which it rests against eccentric pin 4,
turn eccentric pin 4 in accordance with the requirement and tighten nut 3.
● Push guide bar 5 downwards and then upwards as far as possible. Bushing 6 must not
move laterally during this movement (readjust eccentric pin 4 if necessary).
● Move guide bar 5 until it rests against eccentric pin 4 and tighten screws 1 and 2.
4
3
2
1
Justierung
2
1
5
9