7
6. NOISY 1. BACKLASH BETWEEN SEE MECHANICAL P.18
OPERATION SHUTTLE HOOK GEAR AND ADJUSTMENT “CLEARANCE
LOWER SHAFT GEAR IS TOO BETWEEN NEEDLE AND HOOK
BIG. (NO.2)”.
2. INAPPROPRIATE BELT SEE MECHANICAL P.26
TENSION. ADJUSTMENT “MOTOR BELT
TENSION”.
3. NOT ENOUGH OIL. APPLY OIL. P.28
7. DEFORMATION 1. INAPPROPRIATE NEEDLE SEE MECHANICAL P.15
PATTERN SWING TIMING. ADJUSTMENT “NEEDLE
SWING”.
2. INAPPROPRIATE SEE MECHANICAL P.25
DISENGAGEMENT OF CAM ADJUSTMENT
FOLLOWER. “DISENGAGEMENT OF CAM
3. UPPER THREAD TENSION ADJUST UPPER THREAD P.12
IS TOO STRONG. TENSION CORRECTLY.
CONDITION CAUSE HOW TO FIX REFERENCE
FOLLOWER”.
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