Singer 20U - How to Set Knee Lifter When Used Only for Lifting Presser Foot

HOW TO SET KNEE LIFTER WHEN USED ONLY FOR LIFTING PRESSER FOOT
Move lifting arm C to the position where bell crank A
which is connected to lifting lever can be operated. Then
tighten screw D.
Make certain that the point end of the lifting arm C does
not interfer with the oil pan, and then fix rock shaft stop dog
F.
Raise presser foot with presser bar lifter and push knee
plate E to the right until the presser bar lifter comes down
(height of presser foot above throat plate approximately
9 mm). Make certain that the knee plate does not move any
further and secure rock shaft stop dog G.
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