Brother T8452C Parts Book

	T-8452C
		PARTS BOOK

2

TWIN NEEDLE DIRECT DRIVE SPLIT NEEDLE BAR LOCK STITCHER WITH THREAD TRIMMER

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BROTHER INDUSTRIES, LTD.

T-8452C-40

3:

5:

7:

Description of model plate

BROTHER INDUSTRIES, LTD.

T-8452C-40

3: Medium-weight materials

5: Heavy-weight materials

7: Heavy-weight materials (For extra-thick thread)

4.

A.	1
B.	3
C.	5
D.	9
E.	11
F.	13
	15
H.	17
	19
	21
	25
	27
M.	29
N.	33
P.	35
Q.	37
R.	41
S.	43
1.	45
2.	47
3.	49
U.	51
	53
W.	55
Z1.	57
Z2.	59
Wa.	61
Sp.	63
Ga.	64
	68

Notes for using this parts book

1.This book was prepared based on information available in May 2010.

2.Parts are subject to changes in design without prior notice.

3.Parts supplied as complete assemblies are circled by a dotted line.

4.The part which has the symbol "+" on its number (REF.NO) in the figure differs depending on the specification. For details, refer to the parts list.

CONTENTS
A. Machine body ..............................................................….......	1
B. Upper shaft mechanism .....................................................…	3
C. Needle bar rocking mechanism .............................................	5
D. Needle bar flip-up mechanism ..............................................	9

E.Presser foot mechanism ....................................................…. 11

F.Feed mechanism ............................................................….... 13

Quick reverse mechanism .......….......….......….......….......…	15
H. Feed shaft mechanism ......................................................….	17
Gauge parts ...............................................................….......	19
Rotary hook mechanism ........................................................	21
Rotary hook mechanism ........................................................	25
Lower shaft mechanism .....................................................…	27

M.Lubrication .........................................................................…. 29

N.Threading mechanism .......................................................…. 33

P.	Bobbin winder mechanism ...................................................	35
Q.	Thread trimmer mechanism ............................….......….......	37
R.	Tension release mechanism ..................................................	41
S.	Thread wiper mechanism ..................................….......….....	43
1.	Control box and motor mechanism ............................….......	45
2.	Control box mechanism ............................….......….......…....	47
3.	Control box mechanism ............................….......….......…....	49
U.	Quick reverse switch mechanism .......….......….......….......…	51
V.	Power supply equipment mechanism ....................................	53
W.	Presser foot lifting solenoid set mechanism (Option parts) ....	55
Z1.	Accessories ...............................................................….........	57
Z2.	Accessories ...............................................................….........	59
Wa. Warning labels ...............................................................….....		61
Sp. Different parts list .....................................................….......…		63
Ga. Gauge parts list .................................….................…...........		64
	Index .............................................................................…......	68

A .	/ Machine body
	6		8
			9
		22
	7
	12	11
	5
			23
		26	1
		2
	4	25
	3		24
			27
		14
			13
			17
			21
		15
		19
			20
			T-8452C-050
1

A .	/ Machine body
REF.NO	CODE	Q'TY			NAME OF PARTS	RM
1	140063001	2			DOWEL PIN
2	SA3924001	1			POSITIONING PIN
3	SB1311001	1			FACE PLATE ASSY
4	104449001	1			RUBBER CAP, 15.5
5	062501416	2			SCREW PAN M5X14
6	SA2441101	1			REAR COVER
7	062501216	7			SCREW PAN M5X12
8	SA2442201	1			MOTOR COVER
9	062501416	3			SCREW PAN M5X14
11	SA4370101	1			DUST PROTECTOR
12	062500616	2			SCREW PAN M5X6
13	SA2444101	1			BED LEG L
14	SA2445101	1			BED LED S
15	SA2448101	1			SLIDE PLATE LA
17	SA2450101	1			SLIDE PLATE R
19	S36663001	1			SLIDE PLATE F ASSY
20	S34438001	4			SCREW, FLAT SM3.18-40X4
21	116010001	1			SET SCREW, SM5.16-40X4
22	SA2929001	2			RUBBER CAP, 12.5
23	S37060001	1			LABEL, GROUNDING
24	SA9826001	1			LABEL CAUTION
25	062500816	2			SCREW PAN M5X8
26	SA9957001	1			INJURY MARK
27	SA9957002	1			INJURY MARK

T-8452C-050

2

B ./ Upper shaft mechanism

				1		9
	8		3				10
		4
7	6
	5	2
	11	12
		25
					14+
		13
					15
	27
	26				16		23
			17	18	18		21
	28
							22
31		24				33	20
	29				18	19
	32
	30
							T-8452C-109
3

B .	/ Upper shaft mechanism
REF.NO	CODE	Q'TY				NAME OF PARTS	RM
1	SA4551001	1				UPPER SHAFT, DD
2	SA4373001	1				THREAD TAKE-UP CRANK
3	SB1485001	1				BALL BEARING, 6004ZZ
4	SB1484001	1				BALL BEARING, 6004ZZNR
5	SA6166001	1				CRANKSHAFT
6	117006001	1				WICK, L=60
7	113014000	1				PUSHER
8	S25260001	2				SET SCREW SOCKET (FT) M6X5
9	SA1120001	1				BOBBIN WINDER DRIVING WHEEL
10	S23651001	2				SET SCREW SOCKET (FT) M6X6
11	S25235001	1				SCREW M8
12	S25236001	1				SET SCREW SOCKET (FT) M6X10
13	SA2861101	1				THREAD TAKE-UP S-SHAFT UNIT
			<-		>	<For -403>
14+	SA2935101	1				THREAD TAKE-UP LEVER ASSY, S3-L
			<-	, -	>	<For -405, -407>
14+	SA2936101	1				THREAD TAKE-UP LEVER ASSY, S5-L
15	S13160001	1				T-TAKE-UP SLIDE BLOCK ASSY, 2
16	SA2460101	1				PRESSER ADJUSTING UNIT
17	SB1536001	1				BALL BEARING, 6204ZZNR
18	S23651001	4				SET SCREW SOCKET (FT) M6X6
19	SA2461001	1				TIMING PULLEY, U DD
20	S38713100	1				FAN
21	062403512	3				SCREW PAN M4X35
22	028040242	3				WASHER SPRING 2-4
23	025040232	3				WASHER PLAIN M 4
24	SA2463001	1				TIMING BELT
25	012061036	2				SET SCREW SOCKET (FT) M6X10
26	SA2469101	1				THREAD TAKE-UP LEVER COVER
27	062500816	2				SCREW PAN M5X8
28	SA4537001	1				DUST COVER
29	SA4376101	1				SHELTER PLATE
30	SA3065001	1				FELT
31	SA3059101	1				HOLDER, SHELTER PLATE
32	062500816	1				SCREW PAN M5X8
33	SA2462001	1		U		PULLEY U FLANGE

T-8452C-109

4

C . / Needle bar rocking mechanism

							47
				48
										50
										51
43	43										49
	44
44										53
43	43
30	30					3			54
	31									55	55
31					4
				33	35					52
			34						58		57
											58
									59	56	53
	42	40
			41
				29	29				60
				28	28
				39
										46	45
										61
			2
										62
										26
	23						36	24
									25
					6					27
				5		37	38			7
		22	32						20
									19
									18
									17
							9		9	21
							10
										21
							16			8
									16
							15	13		8
									11	12
	1								14	14
											T-8452C-115
5

C.	/ Needle bar rocking mechanism
REF.NO	CODE	Q'TY		NAME OF PARTS	RM
1	SA8738101	1		NEEDLE BAR ROCKER SHAFT UNIT
2	SB1434001	1		NEEDLE BAR BASE ASSY
3	SB1425001	1		SLIDE BLOCK SLIDER
4	018401036	2		BOLT SOCKET M4X10
5	SA4382001	1		NEEDLE BAR ASSY L
6	SA4385001	1		NEEDLE BAR ASSY R
7	SA8749001	1		NEEDLE BAR CLAMP ASSY <Mark Z>
8	149604001	2		PIN, 1.5X5.8
9	149605001	2		SPRING, CLUTCH LEVER
10	149827001	1		PIN, 2X15.8
11	S34561101	1		CLUTCH STOPPER L
12	S34562101	1		CLUTCH STOPPER R
13	149608001	1		PIN, 2X17.8
14	112609001	2		SPRING
15	SA4391101	1		SPRING HOLDER
16	062260316	2		SCREW PAN M2.6X3
17	149610001	1		PIN
18	149611101	1		SPRING, RELEASE PIN
19	SA4392001	1		PIN COVER
20	062260516	1		SCREW PAN M2.6X5
21	SA4389101	2		CLUTCH LEVER ASSY
22	SA4395001	1		SLIDE BLOCK GUIDE PLATE
				Need check the "Mark" the following parts before ordering
23	S07575000	1		SLIDE BLOCK ASSY, 25 <Mark 25>
23	S07575001	1		SLIDE BLOCK ASSY, 30 <Mark 30>
23	S07575002	1		SLIDE BLOCK ASSY, 35 <Mark 35>
23	S07575003	1		SLIDE BLOCK ASSY, 40 <Mark 40>
23	S07575004	1		SLIDE BLOCK ASSY, 45 <Mark 45>
23	S07575005	1		SLIDE BLOCK ASSY, 50 <Mark 50>
23	S07575006	1		SLIDE BLOCK ASSY, 55 <Mark 55>
23	S07575007	1		SLIDE BLOCK ASSY, 60 <Mark 60>
23	S07575008	1		SLIDE BLOCK ASSY, 65 <Mark 65>
23	S07575009	1		SLIDE BLOCK ASSY, 70 <Mark 70>
23	S07575010	1		SLIDE BLOCK ASSY, 75 <Mark 75>
23	S07575011	1		SLIDE BLOCK ASSY, 80 <Mark 80>
24	SA4583001	2		STOPPER, N-BAR
25	149622001	2		SPRING, N-BAR STOPPER
26	SA4396001	1		SPRING COVER
27	060350616	1		SCREW BIND M3.5X6
28	SA4397001	2		ROTATE STOPPER, N-BAR
29	SA4398001	2		SCREW, SM3.5
30	060350616	2		SCREW BIND M3.5X6
31	SA4399001	2		WASHER, PLANE
32	062350816	2		SCREW PAN M3.5X8
33	112728001	1		WICK, L=50
34	SA4393101	1		CRANK ROD, N-BAR
35	SA4394001	1		SLIDE BLOCK
36	SA4401001	1		FELT SUPPORT, D
37	062350516	2		SCREW PAN M3.5X5
38	SA4400001	1		FELT
39	107155001	2		FELT
40	SA5155001	1		FELT SUPPORT
41	SA5237101	1		FELT
42	062350516	1		SCREW PAN M3.5X5
43	014080831	4		SET SCREW SOCKET (CP) M8X8
44	154567000	2		SPACER, 5.3
45	SA2485001	1		SET SCREW COLLAR
46	S25260001	2		SET SCREW SOCKET (FT) M6X5
47	SA2486101	1		BUSH, R
48	062061616	1		SCREW PAN M6X16
49	SA2489001	1		NEEDLE BAR ROCKER LEVER

T-8452C-115

6

C . / Needle bar rocking mechanism

							47
				48
										50
										51
43	43										49
	44
44										53
43	43
30	30					3			54
	31									55	55
31					4
				33	35					52
			34						58		57
											58
									59	56	53
	42	40
			41
				29	29				60
				28	28
				39
										46	45
										61
			2
										62
										26
	23						36	24
									25
					6					27
				5		37	38			7
		22	32						20
									19
									18
									17
							9		9	21
							10
										21
							16			8
									16
							15	13		8
									11	12
	1								14	14
											T-8452C-115
7

C.	/ Needle bar rocking mechanism
REF.NO	CODE	Q'TY		NAME OF PARTS	RM
50	018062032	1		BOLT SOCKET M6X20
51	118735002	1		WASHER
52	SA2490101	1		ROCKER LINK N-BAR
53	S23460001	2		SCREW PAN M6X5
54	SB1437001	1		LINK SHAFT, N-BAR ROCKER
55	012060636	2		SET SCREW SOCKET (FT) M6X6
56	SB1438001	1		ZIGZAG LINK BUSH
57	018062532	1		BOLT SOCKET M6X25
58	SA2493001	2		WASHER, PLAIN
59	SA2494001	1		NEEDLE BAR ROCK ARM
60	018062032	1		BOLT SOCKET M6X20
61	SA5332001	1		BUSH L
62	S48204000	1		WICK, 4X4 L=150

T-8452C-115

8

D .		/ Needle bar flip-up mechanism
			20	21
			22
25		30
		23
		24	26
		29
	30	30		11
		23
	29
27
		30
	31
		29	17
		28	18
			19
			10
				3
		13
		12	1
		16		4
		15+		2
				9
		16		5
		14
			6	8
				7
				T-8452C-122
9

D.		/ Needle bar flip-up mechanism
REF.NO	CODE	Q'TY			NAME OF PARTS	RM
1	SA4402001	1			INDICATION PLATE ASSY
2	104833001	2			RUBBER CAP, 4.3
3	SA5336001	1			HOLDER PLATE COVER
4	062501016	2			SCREW PAN M5X10
5	SA4404001	1			PUSH LEVER
6	SA4441001	2			SHOULDER SCREW, M4
7	SA4405001	1			PLATE, PUSH LEVER
8	062350516	2			SCREW PAN M3.5X5
9	SA5333001	1			SPRING
10	SA4406001	1			STOP LEVER SHAFT ASSY
11	047301842	1			PIN SPRING ROLL AW3
12	SA4408001	1			STUD, L
13	SA4409001	1			STUD, S
14	SA4411101	1			FLIP-UP HOLDER PLATE
			<	>	<Except for China>
15+	S18964001	1			LABEL
			<	>	<For China only>
15+	SA4419001	1			LABEL
16	062500816	2			SCREW PAN M5X8
17	SA4412001	1			BALL GUIDE BUSH
18	150820001	1			SPRING
19	071063550	1			BEARING BALL, 1/4
20	SA4413001	1			ARM LEVER SHAFT
21	062501416	1			SCREW PAN M5X14
22	SA5588001	1			SHOULDER SCREW M4
23	SA4414001	2			SPRING
24	SA4415001	1			SLIDE SHAFT BRACKET
25	062500816	2			SCREW PAN M5X8
26	S07588101	1			SLIDE SHAFT
27	SA4416001	1			SUPPORT PLATE, SLIDE SHAFT
28	149863001	2			SPRING, PLATE
29	SA4417001	3			SET SCREW COLLAR
30	014400432	5			SET SCREW SOCKET (CP) M4X4
31	SA4418001	1			GUIDE SCREW

T-8452C-122

10

E . Presser foot mechanism

				3
					8
					9
							7
				4
				5		1
						2
				6
		17 18					34
25					16	32
			15	14			35
						33	31
	24				15
28				36
26
						21
27				13	22
						20	29
							30
		12	11	10	19
						23
<		/ Option parts >
	39	38	40
			39
			41
	37
							T-8452C-201
11

E .	/ Presser foot mechanism
REF.NO	CODE	Q'TY						NAME OF PARTS	RM
1	SA2495001	1						PRESSER BAR BUSH
2	062500816	1						SCREW PAN M5X8
3	SA1174002	1						PESSER ADJUSTING SCREW, M14
4	SA1175002	1						ADJUST SCREW NUT
5	SA7607101	1						SPRING GUIDE
6	S07346101	1						PRESSER BAR SPRING, -5
7	SB1439001	1						PRESSER BAR
8	SA2498001	1						GUIDE BRACKET, P-BAR
9	S25289001	1						BOLT (CP) M6X10
10	SA2499001	1						PRESSER BAR LIFTING CRANK
11	S31006002	1						LIFTING LEVER
12	S39051001	1						SCREW PAN (S/P W) M3.5X12
13	S07351001	1						TENSION RELEASE PLATE ASSY
14	S07529001	1						T-RELEASE CONNECTING ROD ASSY
15	048030342	2						RETAINING RING E3
16	SA2677101	1						TENSION RELEASE WIRE
17	012061832	1						SET SCREW, SOCKET (FT) M6X18
18	021060306	1						NUT 3 M6
19	SA2500001	1						KNEE LIFTER C-ROD ASSY
20	SA2501001	1						PRESSER BAR LIFTING LEVER
21	SA2502001	1						KNEE LIFTER CONNECTING ROD
22	SA1179001	1						SHOULDER SCREW, M5
23	S07349001	1						P-BAR LIFTING LEVER SHAFT
24	SA2504001	1						SET SCREW COLLAR
25	012500536	2						SET SCREW SOCKET (FT) M5X5
26	S07355051	2						SPRING, EXTENSION
27	062501216	1						SCREW PAN M5X12
28	021500106	1						NUT, 1 M5
29	SA2506001	1						KNEE LIFTER LEVER
30	SA2507001	1						KNEE LIFTER BAR
31	SA1179001	1						SHOULDER SCREW, M5
32	SA2165001	1						SHOULDER SCREW, M6
33	SA1179001	1						SHOULDER SCREW, M5
34	SA4149101	1						ADJUSTING SCREW 6
35	021060306	1						NUT 3 M6
36	S07350001	1						WASHER, PLAIN
			<				>	<Option parts>
37	S10780001	1						TENSION RELEASE PLATE ASSY
38	S07529001	1						T-RELEASE CONNECTING ROD ASSY
39	048030342	2						RETAINING RING E3
40	SA2677101	1						TENSION RELEASE WIRE
41	SA2578001	1						PRESSER BAR LIFTING LEVER

T-8452C-201

12

F .		/ Feed mechanism
			13	12
		9	10	16			17	18
	8
				18		14
			11				15
							25 24
	49	52 51
			48
				26	27
		50				20
							23
				29			19
				32				21
									22
			31
	1		3
				28
				30
			2
			4
	5			33
				6
				7
				35 36	37		44
				34				45	47 46
						41
			43		40
				38
				39
									T-8452C-202
13

F .	/ Feed mechanism
REF.NO	CODE	Q'TY			NAME OF PARTS	RM
1	SA2509001	1			FEED REGULATOR ASSY
2	SA2511001	2			GUIDE PLATE
3	062501016	4			SCREW PAN M5X10
4	SA2512001	1			SLIDE BLOCK ASSY
5	SA2515001	3			FELT
6	SA2516001	1			STOPEER
7	062060816	1			SCREW PAN M6X8
8	143611201	1			F-ROCKER CONNECTING ROD ASSY
9	143612100	1			FEED ROCKER CONNECTING ROD
10	118954000	1			NEEDLE BEARING
11	SA2518001	1			LEVEL FEED ECCENTRIC WHEEL 5
12	SA2585001	1			SET SCREW, SOCKET (FT) M6
13	S25236001	1			SET SCREW SOCKET (FT) M6X10
14	SA2521001	1			FEED ROCKER ARM 5
15	018062032	1			BOLT SOCKET M6X20
16	143613051	1			LINK
17	143616001	1			SHAFT
18	048060342	2			RETAINING RING E6
19	S38427002	1			STITCH LENGTH DIAL, 5
20	SA3056001	1			FEED REGULATING STUD
21	142746122	1			FEED REGULATING SUPPORTER
22	129458202	1			SCREW SM4.76
23	108549001	1			O RING
24	S50098101	1			POSITIONING PIN
25	100328001	1			NOTCH SPRING
26	SA2523001	1			DIAL LOCK LEVER
27	S39830101	1			SPRING
28	SA2525001	1			FEED REGULATOR 5
29	016061031	2			SET SCREW SOCKET (CN) M6X10
30	SA2526001	1			CONNECTING ROD
31	SB1440001	1			ECCENTRIC SHAFT
32	012060636	1			SET SCREW SOCKET (FT) M6X6
33	SB1413001	1			SHOULDER SCREW M6
34	SA2529101	1			SHAFT, R-LEVER TR
35	048080342	1			RETAINING RING E8
36	025100132	1			WASHER PLAIN S 10
37	SA2530001	1			SPACER
38	S07374209	1			REVERSE STITCHING LEVER
39	SA2531001	1			SPRING
40	SA2541001	1			REVERSE STITCHING LEVER PLATE
41	SA6592001	1			SCREW M5
43	104821001	1			RUBBER CAP, 10.5
44	062500816	2			SCREW PAN M5X8
45	SA2532001	1			STOPPER
46	062501216	1			SCREW PAN M5X12
47	025050236	1			WASHER PLAIN M 5
48	S07376001	1			FEED REGULATOR SPRING
49	SA2533001	1			SPRING HOOK
50	062060816	1			SCREW PAN M6X8
51	062501216	1			SCREW PAN M5X12
52	021500106	1			NUT 1 M5

T-8452C-202

14

G . / Quick reverse mechanism

			13		11
					14
			15
				12	18	17
	6			15
	5			19
1
		7			16
			8
			4
9	10		3
					T-8452C-205
15

G .	/ Quick reverse mechanism
REF.NO	CODE	Q'TY			NAME OF PARTS	RM
1	SB1442001				QUICK REVERSE SOLENOID ASSY
3	154730001				RETAINING RING E15
4	154731000				RUBBER STOPPER
5	SA2535101				SOLENOID BRACKET
6	062500812				SCREW PAN M5X8
7	062061016				SCREW PAN M6X10
8	SA2992001				PIN
9	048060142				RETAINING RING EXTERNAL C6
10	153138001				WASHER, PLAIN 6.5
11	SA2536001				SOLENOID LEVER ASSY
12	SA2540001				QUICK REVERSE LEVER
13	016061031				SET SCREW SOCKET (CN) M6X10
14	SA2992001				PIN
15	012060636				SET SCREW SOCKET (FT) M6X6
16	SA2539001				SOLENOID LEVER SHAFT
17	018062032				BOLT SOCKET M6X20
18	149095001				WASHER, PLAIN 6
19	153132000				NYLON TUBE, L=13.5

T-8452C-205

16

H ./ Feed shaft mechanism

		34
			35
			32
		33			5				10
	3
			9
		2					31	31	30
9
					4
						6
			8	9		7
8		1
	9
	22		23
	21				11
			20			29
	19
								25
						13	12
		16				15
			17		25	14
		18	27
					26
			24
					28
									T-8452C-211
17

H .	/ Feed shaft mechanism
REF.NO	CODE	Q'TY		NAME OF PARTS	RM
1	SA3855001	1		BUSH, L: F-ROCKER SHAFT
2	SA3965001	1		FELT
3	SA4028001	1		WICK, 4X4 L=220
4	SA2543001	1		FEED ROCKER SHAFT BUSH, R
5	108802001	1		WICK, 4X4 L=250
6	SA2544001	1		SET SCREW M6
7	012060636	1		SET SCREW SOCKET (FT) M6X6
8	SA2546001	2		SET SCREW COLLAR
9	S23651001	4		SET SCREW SOCKET (FT) M6X6
10	SA3840001	1		FEED ROCKER SHAFT
11	SA6150101	1		FEED BAR TR FORK ASSY
12	SA2927001	1		SCREW, M6X14
13	025060132	1		WASHER PLAIN S 6
14	SA2566001	1		SET SCREW, M3.5
15	021350106	1		NUT 1 M3.5
16	SA2553001	1		FORKED PLATE
17	SA2554001	1		ADJUSTING SCREW, HIGHT
18	062400616	1		SCREW PAN M4X6
19	SA3990001	1		FELT
20	SA3887001	1		FELT
21	SA3888001	1		FELT HOLDER
22	025030132	1		WASHER PLAIN S 3
23	062300416	1		SCREW PAN M3X4
24	SB1445001	1		FEED BAR SHAFT
25	SA2551001	2		THRUST RING
26	012060636	1		SET SCREW SOCKET (FT) M6X6
27	SA2555001	1		FEED ROCKER BASE ARM
28	SA2928001	2		SCREW, M5X12
29	SA4538001	1		WICK, 3X3 L=200
30	SA2806101	1		FEED BAR SLIDE BLOCK ASSY
31	SA6308001	4		SCREW FLAT #0 M2X4
32	SA4009001	1		WICK SUPPORT
33	062400616	2		SCREW PAN M4X6
34	SA2724001	1		WICK, L=400
35	SA4011001	1		OIL TUBE, L=100

T-8452C-211

18

J ./ Gauge parts

5

5

4

3

43

2

1

13+

			9	7
	10

6 8

12

11

T-8452C-231

19