Brother S-7200B Instruction Manual page 49

B. Oil tank oil quantity (-[]0[], []3[] specifications)
Check the oil gauge window (1), and add more oil if the oil
gauge (2) is below the lower reference line.
(Refer to page 8.)
Upper reference
line
Lower reference
line
3680M
3. Checking
1. Replace the needle if it is bent or if the tip is broken.
2. Check that the upper threads have been threaded
3. Carry out a test sewing.
3681M
S-7200B
correctly. (Refer to page 15.)
11. CLEANING
42