Brother International T-8420B Instruction Manual - English - Page 44

Instruction Manual, T-8420b, 8450b, Sa2762-401, 04.b 1

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INSTRUCTION MANUAL http://www.brother.com/ T-8420B, 8450B, 8720B, 8750B SA2762-401 2005.04.B (1)

Section	Page
COVER	1
SAFETY INSTRUCTIONS	2
CONTENTS	6
1. NAMES OF MAJOR PARTS	7
2. MACHINE SPECIFICATIONS	8
3. TABLE AND MOTOR	9
4. INSTALLATION	10
4-1. Installation	11
4-2. Lubrication	17
4-3. Checking the machine pulley rotating direction	19
4-4. Alarm display (Semi dry type)	19
5. PREPARATION BEFORE SEWING	20
5-1. Installing the needle	20
5-2. Removing the bobbin	21
5-3. Winding the lower thread	22
5-4. Installing the bobbin	23
5-5. Threading the upper thread	25
5-6. Adjusting the stitch length	27
5-7. Using the knee lifter	27
5-8. Corner sewing method (T-8450B, 8750B)	28
5-8-1. To stop the needle bars (right and left)	28
5-8-2. Number of stitches: quick-reference guide	28
6. SEWING	29
6-1. Sewing	29
6-2. Backtacking	29
6-3. Sewing condensed stitches	30
7. THREAD TENSION	31
7-1. Adjusting the thread tension	31
7-2. Adjusting the presser foot pressure	32
7-3. Adjusting the thread take-up amount	33
8. CLEANING	34
8-1. Daily cleaning procedures	34
8-2. Lubricating via the oil cover (every 6 months)	35
8-3. Applying grease - When the GREASE indicator illuminates (Semi dry type)	36
9. ADJUSTING THE ROTARY HOOK LUBRICATION AMOUNT	39
10. TROUBLESHOOTING	40

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INSTRUCTION MANUAL

T-8420B, 8450B, 8720B, 8750B

SA2762-401

2005.04.B (1)