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SEWING
MACHINE
DIV.20
MODEL
385.
17822490
MECHANICAL ADJUSTMENT
MOTOR BELTTENSION
TO CHECK:
I. IFTHE MOTOR
BELT TENSION ISTOO TIGHT OR TOO LOOSE, ITMAY
CAUSE BELTNOISE.
ALSO. A TOO TIGHT BELTTENSION CAN
CAUSE THE MACHINE
TO RUN SLOW AND WILL
OVERLOAD
THE MOTOR.
TOO LOOSE A MOTOR
BELT TENSION, HOWEVER,
MAY CAUSE THE BELT TEETH ON THE
MOTOR
PULLEY TO JUMP.
2. THE CORRECT
MOTOR
BELTTENSION ISWHEN
THE BELTPUSHES IN ABOUT 7MM
(0.28") -
9MM
(0.36") U NDER A PRESSURE OF ABOUT 300 GRAMS.
ADJUSTMENT PROCEDURE:
1.
REMOVE THE BELTCOVER.
2.
LOOSEN SCREWS (A) AND (B).
3.
MOVE THE MOTOR UP OR DOWN TO ADJUST THE DEFLECTION TO ABOUT 7MM (0.28") -
9MM (0.36").
4.
TIGHTEN SCREWS (A) AND (B).
_
300g LOAD
DEFLECTION 7-9MM
34
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