SEWINGMACHINE
SOURCE385
PAGE19
DIV. 20
MODEL 385. 11602090
385. 12708090
385. 12710090
385. 12712090
385. 12714090
MOTOR BELT TENSION
CHECK:
I. TOO TIGHT OR TOO LOOSE MOTOR BELT TENSION MAY CREATE BELT NOISE AND
ALSO TOO TIGHT MOTOR BELT TENSION CAN CAUSE THE MACHINE TO RUN SLOW
AND WILL OVERLOAD THE MOTOR.
TOO LOOSE MOTOR BELT TENSION MAY CAUSE JUMPING OF THE BELT TEETH ON
THE MOTOR PULLEY.
2. THE CORRECT MOTOR BELT TENSION IS THAT THE DEFLECTION OF MOTOR BELT
IS ABOUT 7 MM (0.28")- 9 MM (0.36") WHEN PUSHING THE MOTOR BELT BY
FINGER AT ABOUT 300 GRAMS LOAD.
ADJUSTMENT:
I. PHEMOVE THE BELT COVER.
2. LOOSEN THE SCREWS (A) AND (B).
3. MOVE THE MOTOR UP OR DOWN TO ADJUST THE DEFLECTION ABOUT
7 MM (0.28")- 9 MM (0.36").
4. TIGHTEN THE SCREWS (A) AND (B).
300g load
Deflection 7-gmm
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