18
The hook timing is that amount of ascending travel of the needle bar from its lowest
position to where the tip of the rotary hook meets the left side of the needle should be
3.25 to 3.55 mm.
1. Remove the needle plate and bobbin holder.
2. Remove the bed cover.
3. Turn the handwheel toward you, and set the needle bar at the lowest position.
4. Loosen the setscrews on the lower shaft timing gear.
5. Raise the needle bar between 3.25 - 3.55 mm from the lowest position of the needle bar.
6. Turn the lower shaft timing gear until the tip of hook meets with the right side of needle.
7. Tighten the setscrews on the lower shaft timing gear.
8. Attach the bed cover, bobbin holder and needle plate.
NEEDLE TO HOOK TIMING
Needle plate
Bobbin holder
Setscrew
Lower shaft gear
Match the tip of
hook at the right
side of needle
Needle #14
3.25–3.55 mm
Lower needle position
MECHANICAL ADJUSTMENT
Summary of Contents for HD718
Page 1: ...SERVICE MANUAL PARTS LIST MODEL HD718 First Edition 19 May 2017...
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