Kenmore 16677 Service Manual - Page 14

To Adjust, Timing, Of The, Needle, Upper, Knife

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TO ADJUST THE TIMING OF THE NEEDLE AND THE UPPER KNIFE CORRECT SETTING: THE UPPER KNIFE TIMING IS THE SAME AS THAT OFTHE NEEDLE BAR. THE UPPER KNIFE SHOULD BE ALSO AT ITS HIGHEST POSITION WHEN THE NEEDLE BAR IS AT HIGHEST POSITION. TO ADJUST: 1.REMOVE THE BACK COVER UNIT. 2.LOOSEN TWO SETSCREWS (A), AND MOVE THE BALANCE WEIGHT TO LEFT. 3.LOOSEN TWO SETSCREWS (B), AND ADJUST THE NEEDLE AND UPPER KNIFE TIMING. # TURN THE UPPER KNIFE DRIVE CAM TO THE DIRECTION (C) WHEN THE UPPER KNIFE TIMING IS DELAYED. # TURN THE UPPER KNIFE DRIVE CAM TO THE DIRECTION (D) WHEN THE UPPER KNIFE TIMING IS TOO SOON. 4.TIGHTEN TWO SETSCREWS (B) FIRMLY. MOVE THE BALANCE WEIGHT TO RIGHT. MATCH THE GUIDE LINE ON THE BALANCE WEIGHT WITH THE ONE ON THE MAIN SHAFT CORRECTLY. THEN TIGHTEN THE TWO SCREWS (A). 5. TURN THE HANDWHEEL TOWARD YOU ONE CYCLE, AND RECHECK THE NEEDLE AND THE UPPER KNIFE TIMING. 6. ATTACH THE BACK COVER UNIT. WHEN THE NEEDLE BAR GOES UP, THE UPPER KNIFE GOES UP. WHEN THE NEEDLE BAR GOES DOWN, THE UPPER KNIFE ALSO GOES DOWN. @0 UPPER KNIFE DRIVE CAM GUIDE LINE ON MAIN SHAFT \ DIRECTION (D) --(£_ ..... DIRECTIO (C_) SETSCREW(B) SETSCREW (A) 12

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TO ADJUST
THE
TIMING
OF THE
NEEDLE
AND
THE
UPPER
KNIFE
CORRECT
SETTING:
THE UPPER KNIFE
TIMING
IS THE SAME AS THAT OFTHE
NEEDLE BAR.
THE UPPER KNIFE SHOULD BE ALSO AT ITS HIGHEST POSITION WHEN THE NEEDLE BAR IS AT
HIGHEST POSITION.
TO ADJUST:
1.REMOVE THE BACK COVER UNIT.
2.LOOSEN TWO SETSCREWS
(A), AND MOVE THE BALANCE WEIGHT TO LEFT.
3.LOOSEN TWO SETSCREWS
(B), AND ADJUST THE NEEDLE AND UPPER KNIFE TIMING.
#
TURN THE UPPER KNIFE DRIVE CAM TO THE DIRECTION (C) WHEN THE UPPER KNIFE TIMING
IS DELAYED.
#
TURN THE UPPER KNIFE DRIVE CAM TO THE DIRECTION
(D) WHEN THE UPPER KNIFE TIMING
IS TOO SOON.
4.TIGHTEN TWO SETSCREWS
(B) FIRMLY. MOVE THE BALANCE WEIGHT TO RIGHT.
MATCH THE GUIDE LINE ON THE BALANCE WEIGHT WITH THE ONE ON THE MAIN SHAFT
CORRECTLY. THEN TIGHTEN THE TWO SCREWS
(A).
5. TURN THE HANDWHEEL TOWARD YOU ONE CYCLE, AND RECHECK THE NEEDLE AND THE
UPPER KNIFE TIMING.
6. ATTACH THE BACK COVER UNIT.
WHEN THE NEEDLE BAR GOES UP,
THE UPPER KNIFE GOES UP.
UPPER KNIFE DRIVE CAM
WHEN THE NEEDLE BAR GOES DOWN,
THE UPPER KNIFE ALSO GOES DOWN.
@0
GUIDE LINE ON MAIN SHAFT
\
DIRECTION
(D)
--(£_
.....
DIRECTIO (C_)
SETSCREW(B)
SETSCREW
(A)
12