Brother S-7200C User Manual

 

 

S-7200C

 

130

１０

-１９. Adjusting the rotary hook lubrication amount 

          CAUTION 

 

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. 

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. 

If the sewing machine is sub-class -[]5[], it is a fully dry-type machine and so adjustment of the rotary hook lubrication 
amount is not necessary. 

 

<Checking the lubrication amount> 
1.  Remove the thread from all points from the thread take-up 

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) underneath 

the rotary hook (2) and hold it there. Then run the sewing 
machine at the normal sewing speed for 8 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, carry out the following operations 
in “Adjusting the lubrication amount”. 
 
NOTE: 

If the lubrication amount does not match the correct 
amount shown in the illustration at left (if the amount of 
spattered oil is too much or none at all), turn the adjusting 
screw (3) clockwise to fully tighten it, turn it back 
counterclockwise by 2 1/2 turns, and then carry out the 
following adjustment. 

 
 
 

<Adjusting the lubrication amount> 
1.  Tilt back the machine head. 
2. Turn the adjusting screw (3) to adjust the lubrication 

amount. 
・ 

If the rotary hook adjusting screw (3) is turned 
clockwise, the lubrication amount becomes greater. 

・ 

If the rotary hook adjusting screw (3) is turned 
counterclockwise, the lubrication amount becomes 
smaller. 

NOTE: 
Do not remove the rubber cap (4). 

3. Check the lubrication amount again according to the 

procedure given in “Checking the lubrication amount” 
above. 
*  Turn the adjusting screw (3) and check the lubrication 

amount repeatedly until the lubrication amount is 
correct. 

4. Check the lubrication amount again after the sewing 

machine has been used for approximately two hours. 

 2127B 

2303M 

2304M 

0935M 

Approx. 25mm 

Approx. 70mm 

Too little 

Spattered oil 

Too much 

Correct 

Bed 

5–10mm 

Less oil 

More oil