Singer 7285Q - Origin Point Positioning of Zigzag Bight; Checking Meshing Position of Gears; Disassembling and Re-Assembling

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Original issue
May, 2014
Service Manual
7285Q
Model
14. Origin point positioning of zigzag bight
(A) Checking meshing position of gears
This procedure is needed only when disassembling and re-assembling cams.
Checking
1. Remove face cover and turn off power switch.
2. Rotate gear (a) clockwise until it stops with long projection touched with shaft.
3. Check to see if end (c) of zigzag cam (b) aligns with center of gear (a).
Disassembling and re-assembling
If meshing position of two gears is not correct, remove zigzag cam (b) from shaft and insert it
into correct position.
(B) Origin point positioning of zigzag bight
1. Turn off power switch.
2. Loosen left side of two screws on gear (a).
3. Turn on power switch. Loosen the screw tightened on gear (a) and rotate gear (a) clockwise
until it touches with limiter and tighten two screws securely.
Turn clockwise.
a
b
c
Left side of two screws is
to be loosened.
a
Long projection
concealed inside