5
CONDITION
CAUSE
HOW TO FIX
REFERENCE
6. NOISY
1. BACKLASH BETWEEN SEE MECHANICAL
P.14
OPERATION SHUTTLE HOOK GEAR AND ADjUSTMENT “CLEARANCE
LOWER SHAFT GEAR IS TOO BETWEEN NEEDLE AND
GREAT.
SHUTTLE (NO.2)”.
2. LOWER SHAFT GEAR IS ELIMINATE THE LOOSENESS.
LOOSE.
3. INAPPROPRIATE BELT
SEE MECHANICAL
P.22
TENSION.
ADjUSTMENT “MOTOR BELT
TENSION”.
4. UPPER SHAFT GEAR IS LOOSE. ELIMINATE THE LOOSENESS.
5. NOT ENOUGH OIL.
OIL ALL MOVING PARTS.
7. DEFORMATION 1. INAPPROPRIATE ZIGZAG SEE MECHANICAL
P.11
PATTERN
SYNCHRONIZATION.
ADjUSTMENT “NEEDLE
SWING”.
2. INAPPROPRIATE
SEE MECHANICAL
P.21
DISENGAGEMENT OF CAM ADjUSTMENT
FOLLOWER.
“DISENGAGEMENT OF CAM
FOLLOWER".
3. UPPER THREAD TENSION ADjUST UPPER THREAD
P.8
IS TOO STRONG.
TENSION CORRECTLY.
WHAT TO DO WHEN