Viking Huskylock 936 User Manual

—56—

Under normal conditions, if you carefully follow instruction for operating, no diffi cult or special ad-

justment is necessary for this machine.

Following cases are not failure of machine. Check your machine before you call service.

PROBLEM

CORRECTION

REFERENCE

PAGE

CAUSE

• Plug cord into electrical outlet and 

machine properly

• Increase pressure by setting lever to 

(N~5)

• Adjust differential feed

• Insert new needle
• Reset needle
• Do not pull fabric

• Re-thread machine
• Reset thread tension(s)
• Reset needle / change to new needle

• Insert new needle
• Reset needle
• Re-thread machine

• Check thread tensions

• Loosen needle thread tensions

• Re-thread machine
• Set differential feed 0.5-N 

• Not plugged in properly

• Pressure on presser foot 

insuffi cient

• Differential feed not set cor-

rectly

• Bent or blunt needle
• Needle inserted incorrectly
• Pulling fabric while sewing

• Improper threading
• Thread tension(s) too tight
• Incorrect tension setting of 

needle

• Bent or blunt needle
• Needle inserted incorrectly
• Improper threading

• Tension not adjusted properly

• Needle thread tensions are 

too tight

• Improper threading
• Need differential feed

4

19

23

6
6

26

16

19~21

6

6
6

16

19~21

19~21

16
23

Machine does 

not sew

Machine does 

not

feed properly

Needle

breaks

Puckering

Irregular 

stitches

Breaking 

threads

Skipping 

stitches