Brother T8452 Parts Book

T-8452A

PARTS BOOK

2

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

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BROTHER INDUSTRIES, LTD.

T-8452A-4

2

1

1		0:	/ Minimum lubrication type

3: / Medium-weight materials

2

5: / Heavy-weight materials

A.								1
B.								3
C.								5
D.								9
E.								11
F.								13
								15
H.								15
								17
								19
								23
								23
M.								25
N.								25
P.								27
Q.								31
R.								33
S.								35
.								37
U1.								39
U2.								41
								44
W.								45
Z1.								47
Z2.								49
Wa.								51
Sp.								52
Ga1.								53
								57

Notes for using this parts book

1.This book was prepared based on information available in January 2005.

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

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

.

4.If the symbol * is found in the " Parts No." column, refer to the different parts lists, gauge parts list on page 52 -56.

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. Quick reverse switch mechanism .......….......….......….......…	15
Feed shaft mechanism ......................................................….	17
Rotary hook mechanism ........................................................	19
Rotary hook mechanism ........................................................	23
Gauge parts ...............................................................….......	23
M. Lower shaft mechanism .....................................................….	25
N. Tension release mechanism ..................................................	25

P.Lubrication .........................................................................…. 27

Q.Threading mechanism .......................................................…. 31

R. Bobbin winder mechanism		...................................................…	33
S. Thread trimmer mechanism ............................….......….......…			35
. Thread wiper mechanism		..................................….......…......	37
U1.	Control box and motor mechanism ............................….......		39
U2.	Control box mechanism ............................….......….......….....		41
	Power supply equipment mechanism ....................................		44
W.	Presser foot lifting solenoid set (Option parts) .......................		45
Z1.	Accessories ...............................................................….........		47
Z2.	Accessories ...............................................................….........		49
Wa. Warning labels ...............................................................….....			51
Sp. Different parts list .....................................................….......…			52
Ga1. Gauge parts list .................................….................…...........			53
	Index .............................................................................…......		57

A .	/ Machine body
			10
	6		8
			9
	7	22
	12	11
	5		23
			1
	4	2	25
	3
			24
		14	13
			18
			17
		16
			21
		15	19
			20
			T-8452A-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	SA4364001	1			FACE PLATE
4	104449001	1			RUBBER CAP, 15.5
5	062501416	2			SCREW PAN M5X14
6	SA2441001	1			REAR COVER
7	062501216	7			SCREW, PAN M5X12
8	SA2442101	1			MOTOR COVER
9	062501416	3			SCREW, PAN M5X14
10	062501016	1			SCREW, PAN M5X10
11	SA4370101	1			DUST PROTECTOR
12	062500616	2			SCREW, PAN M5X6
13	SA2444101	1			BED LEG,L
14	SA2445101	1			BED LED,S
15	SA2447001	1			SLIDE PLATE, LA ASSY
16	SA2479001	1			BOBBIN WINDOW
17	SA2449001	1			SLIDE PLATE ASSY, R
18	SA2479001	1			BOBBIN WINDOW
19	S36663051	1			SLIDE PLATE F ASSY
20	S34438051	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
					< For Japan only >
24	SA2040001	1			LABEL, CAUTION JPN/ENG
					< Except for Japan >
24	SA2041001	1			LABEL, CAUTION CHN/ENG
25		2			SCREW PAN M5X8

T-8452A-050

2

B .		/ Upper shaft mechanism
					1		9	10
		8		3
			4
	7	6
		5	2
		11	12			14
								15
				13
		27
				25
		26				16
								23
		28		17	18	18		21
	31							22
			24
								20
		29
						18	19	33
		32
		30
								T-8452A-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	S25234001	1				BALL BEARING, 6004ZZ
4	S38707001	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
14	SA2935101	1				THREAD TAKE-UP LEVER ASSY,S3-L
15	S13160001	1				T-TAKE-UP SLIDE BLOCK ASSY,2
16	SA2460001	1				PRESSER ADJUSTING UNIT
17	S38710001	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	SA2469001	1				THREAD TAKE-UP LEVER COVER
27	062500816	2				SCREW, PAN M5X8
28	SA3057001	1				DUST COVER
29	SA4376101	1				SHELTER PLATE
30	SA3065001	1				FELT
31	SA3059001	1				HOLDER, SHELTER PLATE
32	062500816	1				SCREW, PAN M5X8
33	SA2462001	1	U			PULLEY U FLANGE

T-8452A-109

4

C .		/ Needle bar rocking mechanism
					48		47
										50
	43									51		49
43
44	44									53
43	43
30	30						3	4	54			55
31	31									55
				34	33	35				52
									58			57
										56		58
	42								59			53
		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-8452A-115
5

C. / Needle bar rocking mechanism

REF.NO	CODE	Q'TY		NAME OF PARTS	RM
1	SA4377001	1	; < =	NEEDLE BAR ROCKER SHAFT ASSY
2	SA4378001	1	; >	NEEDLE BAR BASE ASSY
3	SA2474201	1	>	SLIDE BLOCK SLIDER
4	018401036	2	;	BOLT SOCKET M4X10
5	SA4382001	1	;	NEEDLE BAR ASSY, L
6	SA4385001	1	;	NEEDLE BAR ASSY, R
				Need check the "Mark" the following parts before ordering.
7	SA4387001	1	; >	NEEDLE BAR CLAMP ASSY <Mark A>
7	SA4387002	1	; >	NEEDLE BAR CLAMP ASSY <Mark B>
7	SA4387003	1	; >	NEEDLE BAR CLAMP ASSY <Mark C>
8	149604001	2	?! "# #"$	PIN, 1.5X5.8
9	149605001	2	%&'@(	SPRING, CLUTCH LEVER
10	149827001	1	?!) #"$	PIN, 2X15.8
11	S34561001	1	%& *	CLUTCH STOPPER, L
12	S34562001	1	%& *	CLUTCH STOPPER, R
13	149608001	1	?!) +"$	PIN, 2X17.8
14	112609001	2	,-%A@(	SPRING
15	SA4391001	1	@(../	SPRING HOLDER
16	062260316	2	, )0 1	SCREW PAN M2.6X3
17	149610001	1	2?!	PIN
18	149611101	1	2?!@(	SPRING, RELEASE PIN
19	SA4392001	1	2?!3-	PIN COVER
20	062260516	1	, )0 #	SCREW PAN M2.6X5
21	SA4389001	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	, 1	SLIDE BLOCK ASSY, 30 <Mark 30>
23	S07575002	1	, 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	, 0	SLIDE BLOCK ASSY, 60 <Mark 60>
23	S07575008	1	, 0#	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	;%A2	STOPPER, N-BAR
25	149622001	2	;%A2@(	SPRING, N-BAR STOPPER
26	SA4396001	1	@(3-	SPRING COVER
27	060350616	1	@!<1# 0	SCREW BIND M3.5X6
28	SA4397001	2	;4 *	ROTATE STOPPER, N-BAR
29	SA4398001	2	5*(=1"#	SCREW, SM3.5
30	060350616	2	@!<1# 0	SCREW BIND M3.5X6
31	SA4399001	2	BC(	WASHER, PLANE
32	062350816	2	, 1#$	SCREW PAN M3.5X8
33	112728001	1	67	WICK, L=50
34	SA4393001	1	;! 8%<	CRANK ROD, N-BAR
35	SA4394001	1		SLIDE BLOCK
36	SA4401001	1	3/ 9./:	FELT SUPPORT, D
37	062350516	2	, 1# #	SCREW PAN M3.5X5
38	SA4400001	1	3/	FELT
39	107155001	2	3/	FELT
40	SA5155001	1	3/ ../	FELT SUPPORT

T-8452A-115

6

C .		/ Needle bar rocking mechanism
					48		47
										50
	43									51		49
43
44	44									53
43	43
30	30						3	4	54			55
31	31									55
				34	33	35				52
									58			57
										56		58
	42								59			53
		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-8452A-115
7

C. / Needle bar rocking mechanism

REF.NO	CODE	Q'TY		NAME OF PARTS	RM
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 ASSY
50	018062032	1	*#$	BOLT SOCKET M6X20
51	118735002	1	+/%	WASHER
52	SA2490101	1	!* ,!	ROCKER LINK, N-BAR
53	S23460001	2		SCREW, PAN M6X5
54	SA4117001	1	,!-&	LINK SHAFT, N-BAR ROCKER P
55	012060636	2		SET SCREW SOCKET (FT) M6X6
56	SA4118001	1	,! &	ZIGZAG LINK BUSH, P
57	018062532	1	*#	BOLT SOCKET M6X25
58	SA2493001	2	+/%	WASHER,PLAIN
59	SA2494001	1	!* , 0	NEEDLE BAR ROCK ARM
60	018062032	1	*#$	BOLT SOCKET M6X20
61	SA5332001	1	, -'	BUSH, L
62	S48204000	1	() )	WICK, 4X4 L=150

T-8452A-115

8

D .	/ Needle bar flip-up mechanism
		20	21
		22
25	30
	23	26
	24
	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-8452A-122
9

D. / Needle bar flip-up mechanism

REF.NO	CODE	Q'TY		NAME OF PARTS	RM
1	SA4402001	1	1	INDICATION PLATE ASSY
2	104833001	2	2	RUBBER CAP, 4.3
3	SA5336001	1	1 3	HOLDER PLATE COVER
4	062501016	2		SCREW PAN M5X10
5	SA4404001	1	4 3	PUSH LEVER
6	SA4441001	2	5 1	SHOULDER SCREW, M4
7	SA4405001	1	4 3	PLATE, PUSH LEVER
8	062350516	2		SCREW PAN M3.5X5
9	SA5333001	1	4 3 3	SPRING
10	SA4406001	1	4 3 1	STOP LEVER SHAFT ASSY
11	047301842	1	4 67 !	PIN SPRING ROLL AW3
12	SA4408001	1	8"	STUD, L
13	SA4409001	1	8#	STUD, S
14	SA4411101	1	$%1	FLIP-UP HOLDER PLATE
				<For Japan only>
15	S18964001	1	$%1& ' (%	LABEL
				<For Except Japan>
15	SA4419001	1	$%1& ' ) *%	LABEL
16	062500816	2	+	SCREW PAN M5X8
17	SA4412001	1	,- 9	BALL GUIDE BUSH
18	150820001	1	,.3	SPRING
19	071063550	1	*$* /	BEARING BALL, 1/4
20	SA4413001	1	3 1*:	ARM, LEVER SHAFT
21	062501416	1		SCREW PAN M5X14
22	SA5588001	1	5 1	SHOULDER SCREW M4
23	SA4414001	2	3 1*:3	SPRING
24	SA4415001	1	&81*0	SLIDE SHAFT BRACKET
25	062500816	2	+	SCREW PAN M5X8
26	S07588101	1	&81	SLIDE SHAFT
27	SA4416001	1	&81*0	SUPPORT PLATE, SLIDE SHAFT
28	149863001	2	1*03	SPRING, PLATE
29	SA4417001	3	&	SET SCREW COLLAR
30	014400432	5	- ;	SET SCREW SOCKET (CP) M4X4
31	SA4418001	1	- 1	GUIDE SCREW

T-8452A-122

10

E .		/ Presser foot mechanism
			3
					8
					9
			4				7
			5				1
					2
			6
25		17 18
					16
		15	14				34
	24				32		31
				15			35
	28				33
				36
	26
	27		13			21
					22
						20	29
							30
				10	19
		12	11
	< T-8452A						23
	/ T-8452A OPTION PARTS >
	39	38	40
		39
		41
		37
							T-8452A-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		SA1174001	1					PESSER ADJUSTING SCREW, M14
4		SA1175001	1					ADJUST SCREW NUT
5		141208001	1					SPRING GUIDE
6		S07346101	1					PRESSER BAR SPRING, -5
7		SA2496001	1					PRESSER BAR
8		SA2498001	1					GUIDE BRACKET, P-BAR
9		S25289001	1					BOLT, (CP) M6X10
10		SA2499001	1					PRESSER BAR LIFTING CRANK
11		S31006001	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		SA2677001	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		062501416	1					SCREW, PAN M5X14
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
				< T-8452A >				< T-8452A OPTION PARTS >
37		S10780001	1					TENSION RELEASE PLATE ASSY
38		S07529001	1					T-RELEASE CONNECTING ROD ASSY
39		048030342	2					RETAINING RING, E3
40		SA2677001	1					TENSION RELEASE WIRE
41		SA2578001	1					PRESSER BAR LIFTING LEVER

T-8452A-201

12

F .		/ Feed mechanism
			13	12
	8	9	10			16			17	18
			11			18		14	15
	49					25 24
		52 51
								19
		50	48	26	27
						20
							23
				29					21
				32					22
				31
	1
			3
				28
			2	30
	5		4
				33
				6
				7
					35 36	37			44
				34			42	41		45	47 46
			43			40
					38
				39
											T-8452A-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	S38427001	1						STITCH LENGTH DIAL, 5
20	SA3056001	1						FEED REGULATING STUD
21	142746002	1						FEED REGULATING SUPPORTER
22	129458102	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	SA2527001	1						ECCENTRIC SHAFT
32	012060636	1						SET SCREW, SOCKET (FT) M6X6
33	SA2528101	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	S07374109	1						REVERSE STITCHING LEVER
39	SA2531001	1						SPRING
40	SA2541001	1						REVERSE STITCHING LEVER PLATE
41	062501216	1						SCREW, PAN M5X12
42	025050336	1						WASHER, PLAIN L 5
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-8452A-202

14

G .	/ Quick reverse mechanism
			13		11
					14
		15
				12	18	17
		6		15
	5		19
	1
		7			16
		2		8
		4	3
	9	10
					T-8452A-205
H .	/ Quick reverse switch mecanism
	13
	12			6
11
10		7
	3	8
	9	5
			4
	2				1
					T-8452A-508
15

G .	/ Quick reverse mechanism
REF.NO	CODE	Q'TY			NAME OF PARTS	RM
1	SA3072001				QUICK REVERSE SOLENOID ASSY
2	154729001				PLUNGER
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-8452A-205
H .		/ Quick reverse switch mechanism
REF.NO	CODE	Q'TY			NAME OF PARTS	RM
1	SA2688001				REVERSE ACTUATOR ASSY
2	SA2270001				REVERSE SWITCH BRACKET
3	S34281000				REVERSE SWITCH BRACKET
4	S32904000				ACTUATOR
5	S32905000				REVERSE SWITCH SPRING
6	SA1390001				R-SWITCH ASSY
7	S32907000				MICRO SWITCH
8	060300606				SCREW, BIND M3X6
9	062500616				SCREW, PAN M5X6
10	SA2689001				CORD HOLDER
11	062500616				SCREW, PAN M5X6
12	SA1388001				CORD HOLDER
13	062500616				SCREW, PAN M5X6

T-8452A-508

16