Brother DB2-B773 User manual

DB2−B773, B774, B7740, B7741 1/21
2002.1
DB2-B773 

B774
DB2-B7740 

B7741
Single Needle Adjustable Top and Bottom
Feed Lock Stitcher
Single Needle Adjustable Top and Bottom
Feed Lock Stitcher
with Thread Trimmer
Single Needle Adjustable Top and Bottom
Feed Lock Stitcher
with Thread Trimmer and Ply Sensor
Single Needle Adjustable Top and Bottom Feed Lock Stitcher
with Thread Trimmer and Programmable Shirring Device
Specifications
Model DB2-B773 B774 B7740 B7741
Subclass – □□3–□□6
Use Thin medium heavy materials
Sewing speed 4,500 rpm
Max. stitch length 5.0 mm
Feed method Top & bottom feed
Height of presser foot
Knee : 13 mm
Manual : 6 mm
Automatic : 8 mm
Needle bar stroke 31.0 mm
Thread take-up stroke 57.4 mm
Height of feed dog 0.8 mm
Max. upper feed amount 6.0 mm 8.0 mm
Intermediate gathering – {
Needle DB ×1 #11

DB2−B773, B774, B7740, B7741 2/21
2002.1
Thread
trimmer Ply sensor Programmable shirring device Application
B773 - - -
B774 ○--
Men’s wear: seaming sleeves, attaching facings, sewing up whole
linings, seaming back centers, seaming backs, lining
centers, seaming side, matching shoulders
Slacks: seaming sleeves, matching shoulders, attaching fasteners,
seaming sides, attaching and seaming sleeves, rolled-
hemming linings, attaching yokes, attaching cuffs, joining
waists
Leather jumper: seaming necks, attaching facing at back centers, lining
jeresy fonts, lining jeresy rounds
Ski anorak: sewing inside cotton for front & back shirts, front & back
shirts, sides, necks, outer & inner sleeves and front & back
bodies, attaching fasteners
B7740 ○○ -Same applications as B773 and B774.
Especially attaching pockets, stitching collars.
B7741 ○-○Same applications as B773 and B774.
Especially attaching sleeves (easing).

DB2−B773, B774, B7740, B7741 3/21
2002.1
DB2-B773-00
DB2-B774-0
DB2-B7740- 2
DB2-B7741-46
Gathering
3 – (Standard)
6○(Gathering type)
Shirring
3 – (Standard)
6○(Shirring type)
Function
Thread
trimmer Thread wiper Quick back Automatic presser foot lifter
3○–○–
4○○ ○ –
9○○ ○ ○
(Solenoid)
Function
Thread
trimmer Thread wiper Quick back Automatic presser foot lifter
4○○ ○ –
9○○ ○ ○
(Solenoid)
Shirring device
3 – (Standard)
6○(Shirring type)
Function
Thread
trimmer Thread wiper Quick back Automatic presser foot lifter
4○○ ○ –
9○○ ○ ○
(Solenoid)

DB2−B773, B774, B7740, B7741 4/21
2002.1
Feedguidedevice [DB2−B773, B774]
Ref. No. Part name Part code Q’ty
1 FG guide assy S16125−001 1
Feed guide base device [DB2−B773, B774]
Ref. No. Part name Part code Q’ty
2 FG guide base assy S16126−001 1

DB2−B773, B774, B7740, B7741 5/21
2002.1
Waistbeltdevice [DB2−B773, B774]
Ref. No. Part name Part code Q’ty
3 WB device assy 183553−001 1

DB2−B773, B774, B7740, B7741 6/21
2002.1
Edge guide device [DB2−B774, B7740, B7741]

DB2−B773, B774, B7740, B7741 7/21
2002.1
Edge guide device [DB2−B774, B7740, B7741]
Ref. No. Part name Part code Q’ty
1 Edge guider set S16040-009 1
1-1 Guide base assy 154635-001 1
1-1-1 Rubber cushion 154637-000 3
1-1-2 Reflection plate 154638-000 1
1-2 Guide plate lower 154639-001 1
1-3 Guide plate upper 154640-001 1
1-4 Guide cover 154641-009 1
1-5 Guide block 154642-001 1
1-6 Screw, pan M3.57 – 40 ×10 062671-012 2
1-7 Bearing support 154643-001 2
1-8 Screw, flat M3.57 102843-001 4
1-9 Guide bearing (R) 102843-004 2
1-10 Guide bearing (L) 154644-001 2
1-11 Screw, pan M3.57 – 40 ×7 154645-001 8
1-12 Space screw 062670-712 2
1-13 Knob 154646-001 2
1-14 Closing screw 154647-000 1
1-15 Spring 154648-001 3
1-16 Screw 2.38 154649-001 6
1-17 Adjust screw 122771-001 1
1-18 Point adjust shaft 154650-001 1
1-19 Spring 154651-001 1
1-20 Lever guide 156453-000 1
1-21 Screw, flat M2.38 100191-005 2
1-22 Screw, flat M3.57 102843-004 1
1-23 Screw, pan M3.57 – 40 ×5 062670-512 2
1-24 Washer, plain S3.5 025350-132 2
1-25 Guide bracket 154654001 1
1-26 Auxiliary upper plate 154655-000 1
1-27 Upper plate collar 154656-001 1
1-28 Spacer 154657-001 1
1-29 Screw 154623-001 1
1-30 Screw, flat M2.38 100191-005 2
1-31 Washer, spring 2 – 3.5 028350-242 2
1-32 Screw, pan M3.57 – 40 ×7 062670-712 2
1-33 Closing lever supporter S15904-001 1
1-34 Closing lever S15905-001 1
1-35 Screw, pan M3.57 – 40 ×8 062670-812 1
1-36 Screw, pan M3.57 – 40 ×4 062670-412 1

DB2−B773, B774, B7740, B7741 8/21
2002.1
Gauge parts list
For topstitching [DB2−B773, B774, B7740, B7741]
Gauge type Presser foot assy Upper feed dog Needle plate Feed dog Use
A 183558-101 151277-201 S13256-001 159288-201 159301-001
Free presser foot
Exchange parts assy
for thin and medium
materials
Men’s and lady’s wear etc.,
stitching sleeve caps, basting
under sleeves, seaming back
center, joining shoulders, sewing
sides
AC1 183579-101 159447-201
Free presser foot
Exchange parts assy
for thin and medium
materials
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(1mm right compensating foot)
AC1.5 183615-101 S13745-101
Free presser foot
Exchange parts assy
for thin and medium
materials
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(1.5mm right compensating foot)
ACL1 183587-101 S14317-101
Free presser foot
Exchange parts assy
for thin and medium
materials
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(1mm left compensating foot)
AC2 183580-101 S01041-201
Free presser foot
Exchange parts assy
for thin and medium
materials
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(2mm right compensating foot)
ACL2 183588-101 S14321-101
Free presser foot
Exchange parts assy
for thin and medium
materials
Oblique type teeth φ1.6
Oblique type teeth
P1.15
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(2mm left compensating foot)

DB2−B773, B774, B7740, B7741 9/21
2002.1
For topstitching [DB2−B773, B774, B7740, B7741]
Gauge type Presser foot assy Upper feed dog Needle plate Feed dog Use
AC3 183581-101 S01044-201 S13256-001 159288-201 159301-001
Free presser foot
Exchange parts assy
for thin and medium
materials
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(3mm right compensating foot)
ACL3 183589-101 S14323-101
Free presser foot
Exchange parts assy
for thin and medium
materials
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(1mm left compensating foot)
AC5 183616-101 S13748-101
Free presser foot
Exchange parts assy
for thin and medium
materials
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(5mm right compensating foot)
ACL6 183617-101 S13754-101
Free presser foot
Exchange parts assy
for thin and medium
materials
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(6mm left compensating foot)
ACL7 183618-101 S13758-101
Free presser foot
Exchange parts assy
for thin and medium
materials
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(7mm right compensating foot)
AC9 183619-101 S13751-101
Free presser foot
Exchange parts assy
for thin and medium
materials
Oblique type teeth φ1.6
Oblique type teeth
P1.15
Dress, shirt, blouse etc.,
topstitching edge, sewing pocket
(9mm left compensating foot)

DB2−B773, B774, B7740, B7741 10/21
2002.1
For topstitching [DB2−B773, B774, B7740, B7741]
Gauge type Presser foot assy Upper feed dog Needle plate Feed dog Use
AM 159421-201 S13256-001 159295-201 159305-001
Free presser foot
Medium materials
AS 183573-101 154698-201
Free presser foot
Exchange parts assy
for medium materials
φ1.6
Parallel type teeth
P1.15 Dress, shirt, knitshirt ect., sewing
pocket, sword polo-stitching,
topstitching front
AT 183572-101 154445-201 159289-001 159301-001
Free presser foot
Exchange parts assy
for medium materials
Oblique type teeth
φ1.2 Lady’s wear etc., stitching sleeve
caps of face and lining cloth,
seaming back center, joining
shoulder, sewing sides
A22 S13781-201
Heavy materials Whole A type
φ2.2
Oblique type teeth
P1.15
The needle plate has a bigger
needle hole for thick materials
F 183563-001 151292-201 S13260-001 159295-201 159305-001
Fixed presser foot
Exchange parts assy
for medium materials
Collared shirt etc., topstitching
neck, stitching cuffs, side pucker
type
FD 183570-001 153983-101
Fixed presser foot
Exchange parts assy
for medium materials
Cross-shaped type
teeth φ1.6
Parallel type teeth
P1.15
Collared shirt etc., topstitching
neck, stitching cuffs, side pucker
type (max. stitch width 12mm)
“FD” is “F” the thickness presser
(183066-001) to “F”