Pfaff 3117 Instruction Manual page 70

Adjustment
14 - 26
Release the pressure from the knife pawl from time to time while carrying out
the following adjustments by pulling pin 9 in direction of arrow.
Bring thread monitor wire 10 to its front position and secure it.
Loosen nut 11 and turn screw 12 so that recess 13 is centered with respect to the
engaging lever 2.
Pull lever 14 by hand in direction of arrow until the engaging lever 2 falls onto catch 15.
Bring lever 14 back to its basic position (i.e. let go of it).
Turn the handwheel in direction of rotation until knife pawl 16 has engaged in drive
dog 17.
Turn screw 12 so that there is a clearance of approx. 0.5 mm between the engaged
engaging lever 2 and the catch 15.
Tighten nut 15.
Bring engaging lever 2 to its basic position by pulling pin 9 in direction of arrow.
Turn adjusting screw 18 (M6 x 30 of cover retainer) in lever 14.
Turn the hand crank or the handwheel until lever 14 is at its furthest from the housing (=
highest point of the knife trip).
Loosen screw 19 and turn adjusting screw 18 until the engaging lever 2 has fallen onto
catch 15.
Turn adjusting screw 18 one more turn.
Put downward pressure on clamp 20 and tighten screw 19.
Remove adjusting screw 18.
Turn the handwheel until the engaging lever 2 has engaged fully in the open jaw of the
stop axle.
Keep on turning the handwheel until the knife is back in its basic position.
Carry out a check.
Remove the blocking mechanism on the thread monitor wire.
Lever 8 (see fig. 14 - 23) remains dismounted for further adjustments.