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Documents & Manuals

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Tensioning Guide
Belt-diagram
C-120 pulleys
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Work Order Templates

Pre-built workflows to keep your asset running smoothly.

Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Procedures

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Motion Industries
Applied Industrial Technologies
Electrical Brothers
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Parts

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Drive Motor
B2 Rollers
Tensioning System
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Brother Sewing Machine SN-7220D-405

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Maintenance Plans for Brother Sewing Machine Model SN-7220D-405

Integrate maintenance plans directly into your work orders in MaintainX.

Sewing Machine Adjustment

Warning: This adjustment requires trained personnel with PPE!

Is the power switch turned off and the power cord disconnected?

If power switch is not turned off, stop the procedure and disconnect the power cord.

Is the clearance between the machine bed and the table hole 1.5mm?

Enter the clearance between the machine bed and the table hole

Is the safety switch installed?

Is the stroke of the spring small?

Is the distance from needle plate mounting surface A to the bottom edge of the needle bar the same as the height of surface B on the accessory timing gauge?

Is the rotary hook tip aligned with the center of the needle?

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1 Daily Sewing Machine Cleaning

CAUTION: Turn off the power switch and disconnect the power cord before carrying out these operations.

Secure the table so that it will not move when tilting back the machine head.

Use both hands to hold the machine head when tilting it back or returning it to its original position.

Wear protective goggles and gloves when handling the lubricating oil and grease.

Power switch turned off and power cord disconnected

Table secured

Machine head tilted back using both hands

Protective goggles and gloves worn

Machine cleaned

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Sewing Machine Lubrication

Warning: This procedure requires trained personnel with PPE!

Use only the lubricating oil <JXTG Energy Sewing Lube 10N; VG10> specified by Brother. If this type of lubricating oil is difficult to obtain, the recommended oil to use is <Exxon Mobil Essotex SM10; VG10>.

Is the lubricating oil level above the bottom reference line (2) of the oil gauge window (1)?

Check the quantity of oil in the gearbox immediately after tilting back the machine head.

Is the oil level approximately 2mm above the center reference line in the oil window (1)?

If the oil level is below the normal level, add more lubricating oil.

Remove the rubber cap (3).

Add lubricating oil until the oil level is approximately 2mm above the center reference line in the oil window (1).

Pour the lubricating oil 10 ml at a time while checking the oil window.

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Sewing Machine Maintenance

Checking the condition of the needle and upper thread

1 Replace the needle if it is bent or if the tip is broken.

2 Check that the upper thread has been threaded correctly.

3 Carry out a test sewing.

Replacing parts

Points to note when replacing parts

CAUTION

• Turn off the power switch and disconnect the power cord before carrying out these operations. The machine may operate if the treadle is depressed by mistake, which could result in injury.

• Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

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