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Brother SB3734T User Manual

Brother SB3734T
87 pages
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MODEL :
Home Overlock Machine
SERVICE MANUAL
Nov.,2015
Dec.,2016
Published :
Revised :
c
2015 Brother Industries, Ltd.
All rights reserved.
CONFIDENTIAL
2104D/2104DAV
M343D/4100D/SB3734T
2504D/1034DX

Table of Contents

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Brother SB3734T Specifications

General IconGeneral
Stitch Count37
Buttonhole Styles1-Step
Needle Threading SystemAutomatic
Free ArmYes
Foot ControlIncluded
Bobbin TypeDrop-in
Maximum Sewing Speed (stitches per minute)800

Summary

General Information and Safety Precautions

CAUTIONary Notes for Safe Operation

Important safety and handling instructions for performing adjustments and repairs to avoid damage or injury.

Outline of Machine Mechanisms

Main Mechanisms Overview

Details the primary mechanical assemblies of the overlock machine, including body and tension systems.

Driveline System Explanation

Explains the power transmission from the motor to the various sewing components, detailing movement mechanisms.

Disassembly and Reassembly Procedures

Main Frame, Covers, and Thread Guide Disassembly

Step-by-step guide for removing and reattaching the machine's outer casing and thread guidance parts.

Presser Foot Unit Disassembly

Procedure for taking apart and putting back together the presser foot assembly.

Upper Blade, Lower Blade, and Looper Disassembly

Guide to disassembling the cutting blades and the looper mechanisms.

Feed Mechanism Disassembly

Steps for dismantling and reassembling the feed dog and related components.

Driving Mechanism Disassembly

Instructions for disassembling and reassembling the machine's drive shafts, gears, and pulleys.

Needle Bar Assembly Disassembly

Procedure for disassembling and reassembling the needle bar and its connecting parts.

Machine Adjustment Procedures

Presser Bar Height Adjustment

Adjusts the height of the presser bar to ensure proper fabric feeding and stitch formation.

Needle Bar Height Adjustment

Sets the correct vertical position of the needle bar relative to the needle plate.

Lower Looper Position and Timing Adjustment

Aligns the lower looper's position and timing with the needle for accurate stitching.

Feed Dog Height Adjustment

Sets the correct vertical height of the feed dogs for fabric feeding.

Thread Tension Adjustment

Calibrates thread tension settings for optimal stitch quality across different threads.

Stitch Width Dial Adjustment

Adjusts the stitch width dial to control the lateral movement of the needles and loopers.

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