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Check and Secure Flats and Screws
The Janome QMP16SU uses flats and special screws to help prevent loop lift timing from slipping, except at
the hook. (If the hook cannot slip then something has to break when something goes wrong. The hook is
designed to be adjusted without removing the front cover.)
Check #1:
Check the
Assembly Torque Specifications
chart in section 2,
General Specifications
, this manual. Then
check the following locations, making sure that the first screw of a timed component is firmly fixed on the
respective flat on the shaft. If not, then tighten it.
Check #2: Pitman Crank
Adjust if necessary
Tool: 5mm hex tool
• Make sure the first screw (tapered screw)
has been fixed firmly into the hole in the
main shaft.
Check #3: Take-up Lever Driving Link
Adjust if necessary
Tool: 3 mm handle hex wrench
• Make sure the first screw has been fixed
firmly on the flat.
Pitman Crank
First Screw
First Crank
Screw
Â
IMPORTANT
: The screws are generally positioned 120 degrees apart. When the first screw (Position
1) has been located and tightened on a flat, the second screw is then tightened, compounding the
tightness of the first screw, thus securing and assuring that timing will not change. Always fully tighten
first the screw on the flat.
