Brother International LK3-B430 Support Question
Brother International LK3-B430 Support Question
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Question posted by nelhera141 on December 16th, 2013
Brother Lk3-b430 It Is Not Switching To High Speed To Operate Properly
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Related Brother International LK3-B430 Manual Pages
Service Manual - Page 1
NAGOYA, JAPAN SERVICE MANUAL FOR
BROTHER MODEL LK3-B430
.k.A"
c.o.% -ow G•
es
a
•
BROTHER INDUSTRIES, LTD.
Service Manual - Page 2
... lifter and thread wiper mechanisms
5,
M Feed mechanism
El Thread trimmer mechanism E Thread tension and tension release mechanisms
6'
7
8
DISASSEMBLING PROCEDURE.. CONTENTS
"-:1 • '
• II
1r-111AD, - ,
D SPEED
2
NtiolIECI IIS
3
Needle bar, thread take-up lever, lower shaft.
Service Manual - Page 3
...
28
Tack length
7 - 16
Tack width
1 - 2 (3)
Needle
DP x 5 #16
Presser foot stroke
Sewing speed 1
7 - 20 1- 3 DPx 17 #19
17 mm 2.000 rpm
6.5 - 16
4 - 10
1- 2 (3)
DP x 5 #16
Sub-class Main uses Decorative
Stitching
Number of the LK3-6430 type high speed bar tacking machine. The table below shows the sub-classes of stitches Tack length
Tack width...
Service Manual - Page 6
... 0 of steel ball 0 to convey the power to
clutch lever 0 via connecting rod 0. A
---0 _- I. CLUTCH MECHANISM
0
0
0
0
0
--
gets in the arrow direction, the low speed part® of clutch cam control cam lever roller ® falls from the start lever 0 operates in line with the center of clutch cam This makes the machine sew 2 stitches at high speed.
4.
Service Manual - Page 7
...
0-
0
010
0
C
0-
0
O
(1) Power Work Clamp Lifter Mechanism
I. When power actuating lever Q operates in the arrow direction, roller 0 attached to work clamp lifter lever that roller 0 disengage: from the cam ...pushed up by work clamp lifter roller shaft ® disengages from start lever claw upon sewing the fiial stitch, roller
disengages from the cam part QQ of a turn to
®...
Service Manual - Page 14
... A 0 Remove E-shaped stop ring 0, loosen screw 0, and remove thread trimming arm A 0. 4. Also remove spring 0.
0
-0
0
0 -0
_
0-
0
(r(
J
0 0
0
- 12 - clutch plate 0, key 0, washers 0. Raise the machine head. 3. THREAD TRIMMER I. While turning the pulley, operate the emergency
sotp lever until the knife cam lever claw dropps into the recess of the bed. 5. Knife cam lever spring 0 Unhook...
Service Manual - Page 15
and tighten nut (left-handed).
2. Return the machine head onto the oil pan. 2. Knife cam lever spring 0
Turn the pulley until the knife cam lever roller rides on . 3. Operate knife cam lever 0 in line with four screws 0.
(re 0 0 0 00
FSt r
0 0
a
2 THREAD TRIMMER
I . and turn the pulley until knife cam lever claw m gets into...
Service Manual - Page 17
... ball presser plate to
0
the right or left until clutch cam lever roller
rides on the low speed part of clutch cam 0. and then retighten two bolts 0. Tension release lever
Insert the tip of ...rod is in axial directions.
(4) Similarly, with the center of the machine by turning the pulley.
6.
loosen two
bolts with screw and nut Q).
0
(I ,
•
0
6 .-t: O. 5ntt•...
Service Manual - Page 27
Stopper adjustment With the machine at the stop cam 0 and stopper to the right or left so that...
00- Meet
0 O O
2. Ball presser plate position adjustment
0
•••
0
- 0
(I ) With clutch cam lever roller 0 on the low speed part 0 of clutch lever 0.
0--
0 - .117 CLUTCH AND BRAKE
1.
loosen nut and adjust nut 0 so that the clutch lever spring be removed for easy ...
Service Manual - Page 28
... 0 so that roller shaft 0 disengages from start lever ® when stop cam 0
reaches 5 mm before the machine stop position.
*The timing advances as the clutch cam is locked and low speed pulley m this adjustment, run the machine at high speed,
turned by turning adjusting screw S. when After
the stop position.
- 28 - Start lever position adjustment...
Service Manual - Page 30
Brake spring pressure adjustment If a very heavy material is sewn with the machine of the clutch lever spring hook.
10. Clutch lever spring pressure adjustment If the clutch lever operates so hard that the clutch will not positively fall upon sewing the last stitch due to increased friction resistance between the needle and the...
Service Manual - Page 33
... nut 0. Sub-tension adjustment
0.5 --1.0tra
0.5-1. 0ffn
.--- 0
rr •
o<
O
( I ) Sub-tension disc clearance With the machine at the stop position.
tension discs will have a clearance of 0.5 to 7 mm maximum. Thread take-up lever stroke adjustment
Operating state -
7 mm
Non-operating state
Thread take -up to 1.0 mm
(21 Sub-tension timing
Loosen nut G. Adjust it...
Service Manual - Page 39
Ball presser plate
Clutch does not engage.
or apply grease to it Machine stops in low speed F,h
i operation.
Low-speed belt tension is slipping in low speed operation.
Low-speed belt tension
High-speed pulley is not enough.
Adjust clutch lever position. 27
-39- Clearance between roller holder and roller
Adjust roller holder lever position.
26
Ball presser plate ...
Service Manual - Page 40
...
position, or remose pulley! 27
washer. d Machine position. spring.
_{Power cam operation is wrong. Low-speed belt tension
Low-speed belt tension is too small for power cam to... mm.
Power faulty. Power drise leser does not operate properly. ti
No high speed operation
High-speed belt tension is not enough
High-speed belt tension
High-speed pulley is - d Power pulley torque is so ...
Service Manual - Page 41
... wrong. Start stopper position is
i
Ball presser plate position
dClutch cam timing
Excessite shock at stop
Brake spring pressure
Deceleration is not enough at 'low speed.
----I
operate properly.
L Thread wiper position is wrong. bracket position is
wrong.
Clutch cam timing
Adjust clutch cam timing. 28
thread slips out. Roller shaft disengaging timing
Adjust...
Service Manual - Page 43
... spring pressure is not cut.
--I Adjust needle bar stroke.
23
42 Refer to instructions for mosable knife to present it . h
U Shuttle thread guide does not properly guide thread. Thread take-up lever stroke Needle thread length
Adjust thread take steps to run all way. Lower thread tension
2 Adjust lower thread tension...
Service Manual - Page 45
1
BROTHER INDUSTRIES, LTD. TELEX: BROTHER J59743.59908.59970
I
NAGOYA, JAPAN
. HEAD OFFICE: No. 35, 9-CHOME HORITA-DORI, MIZUHC-I 9110060
Printed in Japan
Instruction Manual - Page 5
... x 5 #16
DP x 5 #9
17 mm
2,000 rpm
* The maximum possible bar tack length and width for this machine are given above.
- 1 -
i,? ,? .../.4J.-.' .?t-\i:,.4s.- •- \Iik 0 IT IS IT II
-9
Knitted clothes
2014 s. 11 it . 21
12 . Kinds of machines The table below shows the sub-classes of the L.K313430 type high speed bar tacking machine. a . II, I i;
Instruction Manual - Page 23
... algodon]
[Synthetic thread]
[Syntheticsfaden] [Fil synthetiquel [Hilo sintetico]
9 I
Illy
10 1
4
a
3
2 °
BROTHER
e 11 12
I3
011
10
I1
5
1
11 9
3
2
. Die untenstehende Tabelle dient als Richtlinie fiir die richtige Wahi... DP x 17 #19
Thread #100 - #80 # 80 - #50 # 30 - #10
Type of sewing to be done, and the table below .
N°50 N° 30 - Aiguille DPx5 #9 DPx5 #14...
Instruction Manual - Page 41
... lever
too weak.
tension spring. Motor is blunt. Lubricate ball presser plate. 12
Clutch lever spring tension Tension of low speed belt.
Lower thread tension.
Ball presser plate oil. Edge of low speed belt.
8
Brake tension spring ten-
thread guide. Position of thread take -up spring.
22
Poor contact between needle and...
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