Brother International LT2-B845 MKII Instruction Manual - Multi - Page 12

B845, B847, B848

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CONTENTS 1. NAMES OF MAJOR PARTS 2. MACHINE SPECIFICATIONS 3 3. OPTIONAL PARTS 6 4. WORK TABLE AND MOTOR 9 5. INSTALLATION 11 5-1. Installing the oil pan 12 5-2. Installing the machine head 13 5-3. Installing the knee lifter assembly 14 5-4. Installing the belt 16 5-5. Installing the bobbin winder 16 5-6. Installing the belt cover 17 5-7. Installing the cotton stand 18 5-8. Lubrication 19 5-9. Checking the machine pulley rotating direction 21 6. PREPARATION BEFORE SEWING 22 6-1. Installing the needle 22 6-2. Removing the bobbin or cap 23 6-3. Winding the lower thread 24 6-4. Installing the bobbin or cap 26 6-4-1. Installing the bobbin [B841, B842, B847, B872] 26 6-4-2. Installing the cap [B845, B848, 88751 27 6-5. Threading the upper thread 29 6-6. Adjusting the stitch length 31 6-7. Corner sewing method [B845, B848, B8751 33 6-7-1. To stop the needle bars (right and left) 33 6-7-2. Number of stitches: quick-reference guide 34 7. SEWING 35 7-1. Sewing 36 7-2. Backtacking [B842, B845, B847, B848, 8872, 8875] 36 8. THREAD TENSION 37 8-1. Adjusting the thread tension 37 8-2. Adjusting the presser foot pressure 38 9. SWITCHING BETWEEN UPPER FEED AND LOWER FEED (B842-1C1 41 10. CLEANING 45 11. STANDARD ADJUSTMENTS 48 11-1. Adjusting of the feed dog height 49 11-2. Adjusting the presser foot height 50 11-3. Adjusting the thread tension spring 51 11-4. Adjusting the needle and rotary hook timing ... 53 11-4-1. Needle to rotary hook point gap 53 11-4-2. Clearances between rotary hooks and needle plate 54 11-4-3. Clearance between rotary hook and opener 55 11-4-4. Needle bar height and lift amount 56 11-5. Adjusting the rotary hook lubrication amount.. 61 11-6. Adjusting of the needles and feed timing 63 12. REPLACING GAUGE PARTS (CHANGING THE NEEDLE WIDTH) 64 13. INSTALLING OPTIONAL PARTS 69 13-1. Replacing the rotary hook 70 13-2. Replacing the upper thread tension assembly 74 14. TROUBLESHOOTING GUIDE 75 Model No. LT2-8840 Mark II LT2-5870 Mark II

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CONTENTS
1.
NAMES
OF
MAJOR
PARTS
9.
SWITCHING
BETWEEN
UPPER
FEED
AND
LOWER
FEED
(B842
-1C1
41
2.
MACHINE
SPECIFICATIONS
3
10.
CLEANING
45
3.
OPTIONAL
PARTS
6
11.
STANDARD
ADJUSTMENTS
48
4.
WORK
TABLE
AND
MOTOR
9
11-1.
Adjusting
of
the
feed
dog
height
49
5.
INSTALLATION
11
11-2.
Adjusting
the
presser
foot
height
50
5-1.
Installing
the
oil
pan
12
11-3.
Adjusting
the
thread
tension
spring
51
5-2.
Installing
the
machine
head
13
11-4.
Adjusting
the
needle
and
rotary
hook
timing
...
53
5-3.
Installing
the
knee
lifter
assembly
14
11-4-1.
Needle
to
rotary
hook
point
gap
53
5-4.
Installing
the
belt
16
11-4-2.
Clearances
between
rotary
hooks
5-5.
Installing
the
bobbin
winder
16
and
needle
plate
54
5-6.
Installing
the
belt
cover
17
11-4-3.
Clearance
between
rotary
hook
and
opener
55
5-7.
Installing
the
cotton
stand
18
11-4-4.
Needle
bar
height
and
lift
amount
56
5-8.
Lubrication
19
11-5.
Adjusting
the
rotary
hook
lubrication
amount..
61
5-9.
Checking
the
machine
pulley
rotating
direction
21
11-6.
Adjusting
of
the
needles
and
feed
timing
63
6.
PREPARATION
BEFORE
SEWING
22
12.
REPLACING
GAUGE
PARTS
(CHANGING
THE
NEEDLE
WIDTH)
64
6-1.
Installing
the
needle
22
6-2.
Removing
the
bobbin
or
cap
23
13.
INSTALLING
OPTIONAL
PARTS
69
6-3.
Winding
the
lower
thread
24
13-1.
Replacing
the
rotary
hook
70
6-4.
Installing
the
bobbin
or
cap
26
13-2.
Replacing
the
upper
thread
tension
6-4-1.
Installing
the
bobbin
assembly
74
[B841,
B842, B847,
B872]
26
14.
TROUBLESHOOTING
GUIDE
75
6-4-2.
Installing
the
cap
[B845,
B848,
88751
27
6-5.
Threading
the
upper
thread
29
6-6.
Adjusting
the
stitch
length
31
6-7.
Corner
sewing
method
[B845,
B848,
B8751
33
6-7-1.
To
stop
the
needle
bars
(right
and
left)
33
6-7-2.
Number
of
stitches:
quick
-reference
guide
34
7.
SEWING
35
7-1.
Sewing
36
7-2.
Backtacking
[B842,
B845, B847, B848,
8872,
8875]
36
8.
THREAD
TENSION
37
8-1.
Adjusting
the
thread
tension
37
8-2.
Adjusting
the
presser
foot
pressure
38
Model
No.
LT2-8840
Mark
II
LT2-5870
Mark
II