Brother industrial sewing machine maintenance and specifications
Shop Area: Textiles
Tool: Brother Industrial Sewing Machine
Requires in-person training: Yes
MT 140-01, Rev. 1
Brother Industrial Sewing Machine Model 7200
SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER WITH THREAD TRIMMER
• Turn off the power switch before carrying out cleaning. • Use both hands to hold the machine head when tilting it back or returning it to its original position. • Be sure to wear protective goggles and gloves when handling the lubricating oil and grease.
Daily cleaning procedures
The following cleaning operations should be carried out each day in order to maintain the performance of this machine and to ensure a long service life. If the sewing machine has not been used for a long period of time, carry out the following cleaning procedures before using it again.
1. Raise the presser foot.
2. Remove the two screws (1), and then remove the needle plate (2).
3. Use a soft wire brush to clean any dust from the feed dog (3).
4. Install the needle plate (2) with the two screws (1).
5. Tilt back the machine head.
6. Remove the bobbin case (4).
7. Wipe off any dust from the rotary hook (5) with a soft cloth, and check that there is no damage to the rotary hook (5).
8. Remove the bobbin from the bobbin case (4) and clean the bobbin case (4) with a cloth.
9. Insert the bobbin into the bobbin case (4), and then place the bobbin case (4) back into the machine.
A. Gearbox oil quantity
- Check the quantity of oil in the gearbox immediately after tilting back the machine head. When the machine head is left for long periods in the tilted-back position, the amount of oil in the felt inside the gearbox drops and the oil level seen from the oil window (1) rises, so that it becomes impossible to measure the actual oil level accurately.
- The position of the oil level in the oil window (1) will vary depending on the angle of the machine head. Tilt back the machine head while the head rest (2) is installed in the correct position.
<Checking the oil quantity>
The oil level should normally be approximately 1 mm above the center reference line in the oil window (1).
1. Look at the oil window (1) from directly in front.
2. If the oil level is below the normal level, add more lubricating oil as described in the following procedure.
1. Remove the rubber cap (3).
2. Add lubricating oil until the oil level is approximately 1 mm above the center reference line in the oil window (1). Do not pour all of the lubricating oil in at once at this time. Pour the lubricating oil 10 ml at a time while checking the oil window (1).’’’NOTE:’’’ Do not pour too much lubricating oil into the specified location. If too much oil is added, oil leaks may result.
3. Insert the rubber cap (3) securely.
4. Return the machine head to its original position. ‘’’NOTE:’’’ The rubber cap (3) has a hole in it for adjusting the air pressure.
B. Oil tank oil quantity
Check the oil gauge window (1), and add more oil if the oil gauge (2) is below the lower reference line.
1. Replace the needle if it is bent or if the tip is broken.
2. Check that the upper threads have been threaded correctly.
3. Carry out a test sewing.
Applying grease (When “GREASEUP” appears)
If “GREASEUP" flashes on the main display (1) and a buzzer sounds when the power switch is turned on, it means that grease needs to be applied. (The sewing machine will not operate at this time, even if the treadle is depressed.) Apply grease as required, while referring to the following for details.
<To continue sewing without applying grease>
1. Press the RESET key (2).
2. The main display (1) will change to stitch number display mode, and sewing will be possible when the treadle is depressed. (The power indicator (3) will flash.)
NOTE • If you do not apply grease when the “GREASEUP” notification appears, the notification will continue to appear and the power indicator (3) will flash each time the power is turned on until you reset the notification • If you continue to use the sewing machine after the “GREASEUP” notification appears without applying grease (or without carrying out the reset procedure), “Err100” will appear after a certain period of time and the sewing machine will be forcibly prevented from operating for safety reasons. If this happens, apply grease and carry out the reset procedure.
1. Turn the power switch to “OFF”.
2. Remove the screws and the set screws.
3. Apply grease to each of the holes until the grease overflows slightly.
4. Tighten the screws and the set screws in order to push the grease in.
5. Turn the machine pulley by hand to move the needle bar up and down several times in order to disperse the grease.
6. Use a cloth to wipe away any excess grease from around the screws and set screws and from underneath needle bar bush D.
7. Carry out the reset procedure given below.
<Resetting the cumulative operating time>
After the grease has been applied, carry out the following procedure to reset the cumulative time between grease applications.
1. Turn the power switch to “ON”. “GREASEUP” will flash in the main display (1) and the buzzer will sound.
2. Press the RESET key (2). The main display (1) will change to stitch number display mode.
3. Press the FUNC (Function) key (4). “n.134 xxx” will appear in green in the main display (1). (xxx represents the time between grease applications.)
4. Press the rightmost key (5). The “xxx” will change to “0”.
5. Press and hold the ENTER key (6) for two seconds or more. The buzzer will make a long beep, and then the main display (1) will change to stitch number display mode. (This completes the reset procedure.)
END OF THE PROCEDURE