Pfaff 1540 User Manual
Page 78
76
43. Changing the pressure spring in the handwheel release
Removing the handwheel release
z
Remove plastic cap 141 using clearance gauge 00-880 133-01 (fig. 94).
z
Remove metal screw 142.
z
Pull out handwheel release disk 143 and take out pawl 144, clutch piece 145 and pressure spring 146.
Fitting the handwheel release
z
Turn handwheel 147 and clutch disk 148 until the hole in the handwheel and the cutout in the clutch
disk are facing downwards (fig. 95).
z
Place pressure spring 146 onto the handwheel boss so that its rear side fits into the guide groove (fig.
96).
z
First place clutch piece 145 onto the handwheel boss, then press it towards the back. The pressure
spring is thus placed vertical and the clutch piece is positioned as shown in fig. 97.
z
Push the pin of pawl 144 into the hole in such a way that it is positioned as shown in fig. 98.
z
Push handwheel release disk 143 with its square mark 150 facing up into the handwheel (fig. 99).
z
In order to be able to lock into the catch, handwheel release disk 143 must be turned counter-clockwi-
se by approx. 5 mm.
z
Fit metal screw 142 with washer 151.
z
Hold handwheel in position and turn release disk 143 in sewing direction until you hear it snap in place.
z
Fit the plastic cap.
z
Check the handwheel release by engaging and disengaging it.