Brother BES-1240BC Guide

5/24/05 1
Perform all maintenance with the machine OFF
Daily Maintenance
Cleaning Oiling
Rotary hook
1. Open bobbin case covers and remove bobbin
cases. Use brush to remove lint build up in and
around rotary hooks. Compressed air may also be
used.
2. Insert bobbin cases in to rotary hooks. Make sure
bobbin thread is not over 2 inches long. Close
bobbin case covers.
Rotary hook
1. Open the bobbin case covers and rotate the outer
part of the rotary hooks counter-clockwise until you
see what is called the raceway. (This is the raised
black portion.)
Place a small drop of oil on the
raceways.
2. Close bobbin case covers.
(Rotary hooks will automatically orientate themselves back
to the correct position when the machine is turned back on.)
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 2
Weekly Maintenance
Oiling
Needle Bars
1. Remove the front plate that has the “BROTHER”
logo on it by removing one screw and loosening
the other. The plate will now slide off to the side.
Do this for all the heads.
2. Oil each needle bar as shown in the picture by
placing a small drop of oil on each needle bar in
the two locations. Do this for all the needle bars
on all the heads.
Thread take up bushing and connecting rod
1. Place 5-6 drops of oil in the channel behind each
head to lubricate the connecting rod.
Head has been
removed to show location.
2. Place 1-2 drops on the thread take up bushing on
each head.
Head has been removed to show
location.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 3
Monthly Maintenance
Cleaning
Knives
1. Remove the two rear screws and remove the
needle plates.
2. Clean any thread and lint around the moving and
fixed knives with a brush or compressed air. Do
this for all heads.
3. Re-install needle plates.
Control Box
1. Use a brush to clean filters on fans and vents in
front and back of control box.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 4
Monthly Maintenance
Greasing
Cam grooves
1. Remove the covers between each head by
removing the four screws.
2. Undo the wire clamp and unplug the connector
from the back. Set covers aside.
3. Remove the cover to the right of head 1 by
removing the 3 screws.
4. Remove the cover to the left on head 6 by
removing the 3 screws.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 5
Monthly Maintenance
Greasing
Cam grooves continued
5. Manually color change the machine to needle 9 on
9 needle machines or 12 on 12 needle machines
by rotating the knob underneath the color change
box.
6. Remove the arm cover on the heads if the
machine has them by removing the 2 screws.
Cover is not shown in photo.
7. Using the black grease, grease the groove of the
thread take up cam. Wipe a little grease on the
base needle bar. Do this for all the heads.
8. Reinstall arm covers if supplied. Manually color
change the machine to needle 1 by rotating the
knob underneath the color change box. Remove the
presser foot guides by removing the 3 screws.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 6
Monthly Maintenance
Greasing
Cam grooves continued
9. Remove presser foot guide plates and unhook
springs located on the back.
10. Using the black grease, grease the work clamp
cam for each head.
11. Hook the spring to the back of the presser foot
guide plate and reinstall the plate leaving the
screws loose. Make sure that the shaft clamp of the
presser foot goes into the guide on the plate. The
retracting lever should be underneath the shaft
clamp. Before final tightening of the screws, please
check the alignment of the presser foot to the
needle plate and make sure that the presser foot
goes up and down smoothly. Do this for all of the
heads.
12. Manually color change to needle 5 if it is a 9 needle
machine or 6 if it is a 12 needle machine. Reinstall
head covers, right cover on head 1 and left cover on
head 6.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 7
Monthly Maintenance
Greasing
Pantograph
1. Remove the X-axis cover screws and remove the
X cover. Removing the X-axis cover is machine
specific depending on whether it is a 4 or 6 head
machine. Please consult your instruction book for
detailed instructions.
2. Remove the Y-axis covers from each end of the
machine by removing the 4 screws for each cover.
3. Remove the sewing arm covers for head 3.
4. Using the white grease, lubricate all of the linear
rails in the V groove both sides of the rails for X-
axis, Y-axis plus the linear rail inside the sewing arm
of head 3. You will have to move the pantograph
both front to back and left to right to lubricate all
the grooves.
5. Reinstall all of the covers.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 8
6 Month Maintenance
Greasing
Heads
1. Remove the covers between each head by
removing the four screws.
2. Undo the wire clamp and unplug the connector
from the back.
3. Remove the cover to the right of head 1 by
removing the 3 screws.
4. Remove the cover to the left on head 6 by
removing the 3 screws.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05
9
6 Month Maintenance
Greasing
Heads continued
5. Remove the power switch cover by removing the 3 top
screws and loosening the 2 lower ones. Cover can be
layed down on machine or by disconnecting the 3
connectors removed completely.
6. Remove the color change assembly cover by removing
the two top screws and loosening the 2 bottom screws.
7. On 4 head models. Remove the color change
rod cover by removing the 2 screws.
8. Manually color change the machine in between
needles 4 and 5 on 9 needle machines or
between 6 and 7 on 12 needle machines by
rotating the knob underneath the color change
box.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 10
6 Month Maintenance
Greasing
Heads continued
9. Remove the 4 hex bolts, 2 on each side of the head.
Do this for all the heads.
10. Cut threads between thread stand and head. Remove
head from machine by lifting up on it and unhook the
wire clamp and disconnect the 2 connectors at the
back. Do this for all heads.
11. Remove this bolt on the cap eaves guide
underneath each head.
12. Loosen this bolt and let the cap eaves guide
hang down.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 11
6 Month Maintenance
Greasing
Heads continued
13. Remove the 3 screws and remove the wiper solenoid
assembly from the heads. Let the wiper solenoid
assembly rest on the pantograph.
14. Remove the left arm cover on the heads if the machine
has them by removing the 2 screws. Cover is not shown in
photo.
15. Remove the presser foot guide plates by
removing the 3 screws and unhooking the
spring from the rear of the plates.
16. Using the black grease fill the syringe by
pulling the plunger out and using a flat bladed
screwdriver to fill the syringe about ½ way.
Replace plunger in syringe and push on
plunger until grease comes out.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 12
6 Month Maintenance
Greasing
Heads continued
17. Remove the 5 screws as indicated by the arrows and
inject grease with the syringe in to the screw holes.
Replace the screws.
18. Remove the one screw on the left of the head and
inject grease into the hole. Replace screw.
19. Remove setscrew at top of base needle bar
and inject grease in to hole. Replace setscrew.
20. Apply black grease to the presser bar spring,
end of presser bar guide bracket, presser
shaft bushing and jump rotary shaft as
indicated by arrows.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 13
6 Month Maintenance
Greasing
Heads continued
21. Using the white grease, grease the V groove on both
sides of the head linear rail with white grease for each
head.
22. Grease the V groove both sides of the linear rail for the
color change assembly with white grease. Grease the
color change assembly and roller bearings with black
grease.
23. Using the black grease, grease the driving
shaft thrust bear with black grease by
loosening the 2 setscrews on the collar and
sliding to the right. Apply the grease to the
rollers of the thrust bearing on both sides.
Move collar back to the left against the thrust
bearing and washer and retighen setscrews.
Make sure setscrews ride on the flats of the
driving shaft.
24. Grease the wiper assembly slot top and bottom
with white grease on both left and right sides.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3

5/24/05 14
6 Month Maintenance
Greasing
Heads continued Cleaning
25. Reassemble machine in reverse order. After placing the
heads on the machine make sure they sit flush with the
mounting surface by manually color changing to
another needle.
1. Remove all of the sewing arm covers by
removing the screws that hold them on.
2. Clean the inside of the sewing arm and hook
module cooling fan with a brush or compressed
air.
3. Replace sewing arm covers when done.
For Technical Assistance Please Call Toll Free 1-877-4BROTHER
Email: [e-mail]
Website: http://www.brother-usa.com/industembroidery/tech_down.aspx
B
BE ES S- -9 94 40 0, ,9 94 41 1, ,1 12 24 40 0, ,1 12 24 41 1
9
96 60 0, ,9 96 61 1, ,9 96 62 2, ,9 96 63 3, ,1 12 26 60 0, ,1 12 26 61 1, ,1 12 26 62 2, ,1 12 26 63 3