Adjusting The Rotary Hook Lubrication Amount - Brother Z-8550B Instruction Manual

Adjusting the rotary hook lubrication amount

Use the following procedure to check the amount of oil being supplied to the rotary hook when replacing the rotary
hook or when changing the sewing speed.
• Be careful not to touch your fingers or the lubrication amount check sheet against moving parts such
as the rotary hook or the feed mechanism when checking the amount of oil supplied to the rotary
hook. Otherwise injury may result.
Checking the lubrication amount
1
Remove the thread from all points from the thread
take-up lever to the needle.
2
Use the lifting lever to lift the presser foot.
3
Run the machine at the normal sewing speed for
approximately 1 minute without sewing any
material (following the same start/stop pattern as
when actually sewing).
4
Place the lubrication amount check sheet (1) to the
left of the rotary hook (2) and hold it there. Then
run the sewing machine at the normal sewing
speed for 10 seconds.
Any type of paper can be used as the lubrication
amount check sheet (1).
5
Check the amount of oil which has spattered onto
the sheet.
If adjustment is necessary, adjust the lubrication
amount.
Be sure to repeat this operation three to four times to check average lubrication amounts.
CAUTION
115