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Hook Timing Inspection/Adjustment
It is recommended that you read the Head Timing Tab section before performing hook timing inspection/
adjustment.
It is possible for the machine rotary hook to slip from the factory-set hook timing. Inadequate timing be-
tween the hook and the needle can be one of the causes of upper thread breaks. The following inspec-
tion procedure will allow you to check the hook timing of your machine(s). If the hook timing position
needs to be adjusted, follow the provided adjustment procedures.
Before making any hook timing changes, you need to perform an inspection to determine if adjustment
is needed.
The procedures below refer to the part of the rotary hook called the “hook point.” See the image below
for the location of the hook point.
List of Tools
• Hex Wrench, 2mm
• Hex Wrench, 2.5mm
• Hex Wrench, 1.5mm bent, short arm
• Magnifying Glass (Optional)
• Flashlight (Optional)
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