Pfaff select 150 Owner's Manual page 42

Machine does not feed or feeds irregularly
Sewing lint has collected between the feed
dog teeth rows.
Feed dogs are lowered, slide C (see page
21) at right.
Machine is running with dif culty
There are thread remnants in the hook
race.
Important note!
Before you replace sewing feet or needles, you must switch off the main switch.
Do not start the threaded machine without fabric in it.
If you leave the machine, even for a short time, do not forget to switch off the main
switch. This is important if children are nearby.
42 Maintenance and trouble-shooting
Remove needle plate, remove lint with
brush.
Push slide C (see page 21) to left.
Remove the threads.