Adjustment Of Feed Dog Height - Pfaff Select 1520 Service Manual

4. Adjustment of feed dog height

Requirement:
At the highest working position of the feed dog, the tips of the feed dog teeth must protrude above the
needle plate surface by 0.9 mm (fig. 6).
Check:
Remove the needle.
Remove the presser foot.
Set the maximum stitch length.
Place bridge gauge (63-112120-08) over the feed dog onto the needle plate.
Turn the handwheel until the feed dog has reached its highest working position.
Carry out a visual check.
The feed dog must not touch the gauge, but must clear it by 0.1 mm.
Adjustment:
Loosen screw 19 by just 1/8 of a turn (fig 7).
Turn eccentric stud 20 until the eccentric is facing the rear part of the housing (basic position)
Turn the eccentric stud to the left until the feed dog height is properly set.
Tighten screw 19.
Cross-check
Turn the handwheel and check the feed dog height at its highest working position.
Make sure that the feed-dog lowering mechanism neither binds nor hits against anything when the
handwheel is turned.
Lower feed dog and check the function.
18