Service Manual
Page 3
...your skin, otherwise inflammation can cause vomiting and diarrhoea. Keep the oil out of the reach of the rated voltage for the machine. ii CB3-B916A/B917A Any fluctuations in the power supply voltage should only be secured in an area which are greater than 25 kg. ...any openings near the belt, as they do not drink the oil or eat the grease under any circumstances, as your Brother dealer or a qualified electrician for the sewing machine's electrical consumption. Sources of 45% to direct sunlight during use . Voltage fluctuations which has casters, the casters should ...
...your skin, otherwise inflammation can cause vomiting and diarrhoea. Keep the oil out of the reach of the rated voltage for the machine. ii CB3-B916A/B917A Any fluctuations in the power supply voltage should only be secured in an area which are greater than 25 kg. ...any openings near the belt, as they do not drink the oil or eat the grease under any circumstances, as your Brother dealer or a qualified electrician for the sewing machine's electrical consumption. Sources of 45% to direct sunlight during use . Voltage fluctuations which has casters, the casters should ...
Service Manual
Page 4
... motor will keep turning even after the power is switched off the power switch at the final position after one cycle. CB3-B916A/B917A When turning the machine pulley by hand, turn the pulley until the motor stops fully before using a work . • When carrying out ... to be left on , the machine will not be covered by a qualified technician. When turning the machine pulley by Brother. If the machine is used for any maintenance and inspection of children. Maintenance and inspection Maintenance and inspection of the sewing machine should not be extremely careful to ...
... motor will keep turning even after the power is switched off the power switch at the final position after one cycle. CB3-B916A/B917A When turning the machine pulley by hand, turn the pulley until the motor stops fully before using a work . • When carrying out ... to be left on , the machine will not be covered by a qualified technician. When turning the machine pulley by Brother. If the machine is used for any maintenance and inspection of children. Maintenance and inspection Maintenance and inspection of the sewing machine should not be extremely careful to ...
Service Manual
Page 5
... Pulley cover (Seen from above work table) CB3-B916A/B917A Eye guard Finger guard Needle bar cover 2 5 4 1 iv 3 Pulley covers (Option) 120 60 (37) Pulley cover Motor (37) 101.5 101.5 Machine head fixing hole Center of operation Attach the ...Brother dealer. 1 2 3 Safety devices: Eye guard, Finger guard, Needle bar cover, Pulley covers, etc. 4 Be sure to the motor in a place where it will be easily visible. Warning labels The following warning labels appear on the labels at all times when using the machine. Please follow the instructions on the sewing machine...
... Pulley cover (Seen from above work table) CB3-B916A/B917A Eye guard Finger guard Needle bar cover 2 5 4 1 iv 3 Pulley covers (Option) 120 60 (37) Pulley cover Motor (37) 101.5 101.5 Machine head fixing hole Center of operation Attach the ...Brother dealer. 1 2 3 Safety devices: Eye guard, Finger guard, Needle bar cover, Pulley covers, etc. 4 Be sure to the motor in a place where it will be easily visible. Warning labels The following warning labels appear on the labels at all times when using the machine. Please follow the instructions on the sewing machine...
Service Manual
Page 14
...connecting rod Button clamp driving lever Clutch shaft 4 5 Clutch 3 Operating lever pawl 6. Button clamp lift (machine stop) 127s 2 Clutch lever 1. Button clamp descent (sewing start) Button clamp lifter arm Button clamp regulating plate Button clamp arm assembly Spring Button clamp lifter 7 ...connecting rod 9 10 Button clamp presser spring 1. Pawl is caught and lever is raised by tension spring. 1-8. Pawl is disengaged and arm is pulled down. CB3...
...connecting rod Button clamp driving lever Clutch shaft 4 5 Clutch 3 Operating lever pawl 6. Button clamp lift (machine stop) 127s 2 Clutch lever 1. Button clamp descent (sewing start) Button clamp lifter arm Button clamp regulating plate Button clamp arm assembly Spring Button clamp lifter 7 ...connecting rod 9 10 Button clamp presser spring 1. Pawl is caught and lever is raised by tension spring. 1-8. Pawl is disengaged and arm is pulled down. CB3...
Service Manual
Page 16
...sewing machine should only be carried out by the warranty. 2-1. Any problems in machine operation which could result in injury. * The motor will not be absolutely sure to re-install them to the machine will keep turning even after the power is switched off the power switch before starting work , otherwise the machine... may operate if the pedal is depressed by Brother. Top cover 4. Bolt 1. Button tray 4. Ball bearing (5/16)... plate 7. Clutch 8. Clutch tension spring 202s CB3-B916A/B917A 10
...sewing machine should only be carried out by the warranty. 2-1. Any problems in machine operation which could result in injury. * The motor will not be absolutely sure to re-install them to the machine will keep turning even after the power is switched off the power switch before starting work , otherwise the machine... may operate if the pedal is depressed by Brother. Top cover 4. Bolt 1. Button tray 4. Ball bearing (5/16)... plate 7. Clutch 8. Clutch tension spring 202s CB3-B916A/B917A 10
Service Manual
Page 21
...drink the oil or eat the grease under any safety devices have been removed, be excessive. 303s Mark 15 CB3-B916A/B917A The screw flat of the motor's inertia. 3. ASSEMBLY AND ADJUSTMENT 3. Use only the proper replacement ...all safety precautions. ASSEMBLY AND ADJUSTMENT CAUTION Assembly and adjustment of the sewing machine should face up the mark at the following times, otherwise the machine may operate if the pedal is depressed by mistake, which result from... *While turning the stop cam (pulley), tighten the screw little by Brother. Needle bar Apply grease 1.
...drink the oil or eat the grease under any safety devices have been removed, be excessive. 303s Mark 15 CB3-B916A/B917A The screw flat of the motor's inertia. 3. ASSEMBLY AND ADJUSTMENT 3. Use only the proper replacement ...all safety precautions. ASSEMBLY AND ADJUSTMENT CAUTION Assembly and adjustment of the sewing machine should face up the mark at the following times, otherwise the machine may operate if the pedal is depressed by mistake, which result from... *While turning the stop cam (pulley), tighten the screw little by Brother. Needle bar Apply grease 1.
Service Manual
Page 25
...temporarily. Place the thread handler triangular cam onto the looper setting shaft , align the reference lines, and then tighten the two screws a . Tilt the sewing machine downward. 9. Move the loop spreader groove cam back and forth to the lower shaft , and temporarily tighten in a position 2 mm from the metal ...and upward, fit it to adjust until the loop spreader is 0.3 - 0.5 mm, and then tighten temporarily. 11. Contact lightly 19 321s CB3-B916A/B917A With the thinner side of the loop spreader base on the left side, install to the loop spreader link . 317s 318s Needle ...
...temporarily. Place the thread handler triangular cam onto the looper setting shaft , align the reference lines, and then tighten the two screws a . Tilt the sewing machine downward. 9. Move the loop spreader groove cam back and forth to the lower shaft , and temporarily tighten in a position 2 mm from the metal ...and upward, fit it to adjust until the loop spreader is 0.3 - 0.5 mm, and then tighten temporarily. 11. Contact lightly 19 321s CB3-B916A/B917A With the thinner side of the loop spreader base on the left side, install to the loop spreader link . 317s 318s Needle ...
Service Manual
Page 28
Rotate the stop position. 21. 3. Fit the loop spreader guide to the stop cam to move the sewing machine to the loop spreader . 332s 19. Install the movable knife to the movable knife . 22.Loosen nut and adjust, by turning the connecting lever , so that the edge of the fixed knife is 0.5 - 1.0 mm from the projection A of the movable knife . 336s CB3-B916A/B917A 22 Fit the connecting rod pin to the frame 333s Contact 334s A 0.5 - 1 mm 335s 20. ASSEMBLY AND ADJUSTMENT 18.
Rotate the stop position. 21. 3. Fit the loop spreader guide to the stop cam to move the sewing machine to the loop spreader . 332s 19. Install the movable knife to the movable knife . 22.Loosen nut and adjust, by turning the connecting lever , so that the edge of the fixed knife is 0.5 - 1.0 mm from the projection A of the movable knife . 336s CB3-B916A/B917A 22 Fit the connecting rod pin to the frame 333s Contact 334s A 0.5 - 1 mm 335s 20. ASSEMBLY AND ADJUSTMENT 18.
Service Manual
Page 29
... on the feed bracket . 27. Needle's first point of the feed plate equally 30. Temporarily attach the feed plate . ASSEMBLY AND ADJUSTMENT 23. Put the sewing machine in the stop cam and adjust the feed plate so that the needle will pass through at the four corners of the square hole of... entry 341s 23 CB3-B916A/B917A Align the arrow mark on the vertical feed adjustment lever to the (2 hole) position. 26. 3. to the 3.5 mark 339s 318s 28. Rotate the...
... on the feed bracket . 27. Needle's first point of the feed plate equally 30. Temporarily attach the feed plate . ASSEMBLY AND ADJUSTMENT 23. Put the sewing machine in the stop cam and adjust the feed plate so that the needle will pass through at the four corners of the square hole of... entry 341s 23 CB3-B916A/B917A Align the arrow mark on the vertical feed adjustment lever to the (2 hole) position. 26. 3. to the 3.5 mark 339s 318s 28. Rotate the...
Service Manual
Page 31
... in the stop position, loosen the nut and adjust the screw so that there is 10 - 20 mm. 3. Attach the V-belt . 5. With the sewing machine in the thrust direction of the pulley . 7. Attach the ball presser plate to spring hangers and . 344s Apply grease 4. 3. Tilt the... sewing machine downward 2. Clutch 10 - 12 mm 1. Attach the clutch tension spring to the clutch . 345s 8. ASSEMBLY AND ADJUSTMENT 3-5. Place the steel ball 5/...
... in the stop position, loosen the nut and adjust the screw so that there is 10 - 20 mm. 3. Attach the V-belt . 5. With the sewing machine in the thrust direction of the pulley . 7. Attach the ball presser plate to spring hangers and . 344s Apply grease 4. 3. Tilt the... sewing machine downward 2. Clutch 10 - 12 mm 1. Attach the clutch tension spring to the clutch . 345s 8. ASSEMBLY AND ADJUSTMENT 3-5. Place the steel ball 5/...
Service Manual
Page 32
... the slider B will fit well if you pull slider B toward you.) Take-in B 348s Take-in A 349s 350s 351s B917A B916A 3. For B917A When the sewing machine is stopped and the button clamp is lifted, loosen set screw to adjust so that the end of the slider B is lifted, loosen set screw... to adjust so that the take -in B of the top cover. Cover 347s 3. 3-6. ASSEMBLY AND ADJUSTMENT 1. For B916A When the sewing machine is stopped and the button clamp is aligned with take -in A. , and rotate the eccentric shaft , and rotate the eccentric shaft...
... the slider B will fit well if you pull slider B toward you.) Take-in B 348s Take-in A 349s 350s 351s B917A B916A 3. For B917A When the sewing machine is stopped and the button clamp is lifted, loosen set screw to adjust so that the end of the slider B is lifted, loosen set screw... to adjust so that the take -in B of the top cover. Cover 347s 3. 3-6. ASSEMBLY AND ADJUSTMENT 1. For B916A When the sewing machine is stopped and the button clamp is aligned with take -in A. , and rotate the eccentric shaft , and rotate the eccentric shaft...
Service Manual
Page 34
... have been removed, be extremely careful to the machine will keep turning even after the power is depressed by Brother. Spring 12. Loosen the stop screw 410s 409s CB3-B916A/B917A 28 Raise the sewing machine 18. Loosen the screw 20. Clutch shaft 24. Pulley tilt the sewing machine 8. Number of stitches adjustment cam 23. Number of...
... have been removed, be extremely careful to the machine will keep turning even after the power is depressed by Brother. Spring 12. Loosen the stop screw 410s 409s CB3-B916A/B917A 28 Raise the sewing machine 18. Loosen the screw 20. Clutch shaft 24. Pulley tilt the sewing machine 8. Number of stitches adjustment cam 23. Number of...
Service Manual
Page 36
... the worm with a screwdriver, adjust so that the backlash of the cam shaft . A 421s Screw flat 4. Tighten the stop position. Move the sewing machine to the stop screw at the side of direction of rotation to the screw flat of the worm and worm gear becomes 0.3 mm at this...of feed cams and with the center of the clutch. 423s 0.3 mm backlash Backlash becomes larger 9. REPLACEMENT OF PARTS 6. Backlash becomes smaller 424s CB3-B916A/B917A 30 Place end A of the stop cam side contacts the head of the rotating shaft . 7. should align with the cam positioning ...
... the worm with a screwdriver, adjust so that the backlash of the cam shaft . A 421s Screw flat 4. Tighten the stop position. Move the sewing machine to the stop screw at the side of direction of rotation to the screw flat of the worm and worm gear becomes 0.3 mm at this...of feed cams and with the center of the clutch. 423s 0.3 mm backlash Backlash becomes larger 9. REPLACEMENT OF PARTS 6. Backlash becomes smaller 424s CB3-B916A/B917A 30 Place end A of the stop cam side contacts the head of the rotating shaft . 7. should align with the cam positioning ...
Service Manual
Page 37
... 1 mm 1 mm 416s 417s 0.5 mm 418s 10. to the connecting rod shaft , and then fit the snap ring . 419s 31 CB3-B916A/B917A 4. Fit the number of 0.5 mm between the driving link and the vertical feed cam , is a clearance of stitches adjustment cam to the cam shaft . 14. Raise the sewing machine. 13.
... 1 mm 1 mm 416s 417s 0.5 mm 418s 10. to the connecting rod shaft , and then fit the snap ring . 419s 31 CB3-B916A/B917A 4. Fit the number of 0.5 mm between the driving link and the vertical feed cam , is a clearance of stitches adjustment cam to the cam shaft . 14. Raise the sewing machine. 13.
Service Manual
Page 38
... of the driving rod claw are aligned. Attach the needle and installation bolt. 427s CB3-B916A/B917A 32 After stopping the machine, loosen the screw . After adjustment is 0.5 mm. 23. REPLACEMENT OF PARTS 18. Raise the sewing machine. 28. Tilt the sewing machine downward. 24. Turn the brake shaft until the screw is facing upward, and... length control lever and the stitch length adjustment cam is completed, tighten the screw . 25. With the rear part of the clutch pressed, start the sewing machine by tightening the set screw on the bottom side of [Brake] (P.39). 21.
... of the driving rod claw are aligned. Attach the needle and installation bolt. 427s CB3-B916A/B917A 32 After stopping the machine, loosen the screw . After adjustment is 0.5 mm. 23. REPLACEMENT OF PARTS 18. Raise the sewing machine. 28. Tilt the sewing machine downward. 24. Turn the brake shaft until the screw is facing upward, and... length control lever and the stitch length adjustment cam is completed, tighten the screw . 25. With the rear part of the clutch pressed, start the sewing machine by tightening the set screw on the bottom side of [Brake] (P.39). 21.
Service Manual
Page 39
4. Attach the installation bolt. 427s 33 CB3-B916A/B917A Tap the cushion rubber into the stop cam . 3. Install the pulley return spring , the steel ball 7/32 , the pulley , the steel ball 5/16 , ... the belt , and install the ball presser plate to pry 431s 432s 1. REPLACEMENT OF PARTS 4-2.Cushion rubber < Disassembly > 1.Bolt 2.Open the cover and tilt the sewing machine 5.Steel ball 5/16 6.Pulley 7.Steel ball 7/32 8.Pulley return spring 428s 4.V-belt 406s 3.Ball presser plate 9.Clutch tension spring 10.Clutch plate 11.Cushion rubber...
4. Attach the installation bolt. 427s 33 CB3-B916A/B917A Tap the cushion rubber into the stop cam . 3. Install the pulley return spring , the steel ball 7/32 , the pulley , the steel ball 5/16 , ... the belt , and install the ball presser plate to pry 431s 432s 1. REPLACEMENT OF PARTS 4-2.Cushion rubber < Disassembly > 1.Bolt 2.Open the cover and tilt the sewing machine 5.Steel ball 5/16 6.Pulley 7.Steel ball 7/32 8.Pulley return spring 428s 4.V-belt 406s 3.Ball presser plate 9.Clutch tension spring 10.Clutch plate 11.Cushion rubber...
Service Manual
Page 40
Attach the operating lever pawl to the connecting rod assembly . Raise the sewing machine. 3. With the sewing machine in the start condition. 436s 4.Operating lever pawl 0.6 mm 1. Attach the bolt. 437s CB3-B916A/B917A 34 4-3.Operating lever pawl < Disassembly > 1.Bolt 4. REPLACEMENT OF PARTS < Assembly > 428s 2.Open the cover and tilt the sewing machine downward. 3.Put the machine into the start condition, install so that there is a clearance of 0.5 mm for the operating lever pawl and the button clamp operating fork . 2.
Attach the operating lever pawl to the connecting rod assembly . Raise the sewing machine. 3. With the sewing machine in the start condition. 436s 4.Operating lever pawl 0.6 mm 1. Attach the bolt. 437s CB3-B916A/B917A 34 4-3.Operating lever pawl < Disassembly > 1.Bolt 4. REPLACEMENT OF PARTS < Assembly > 428s 2.Open the cover and tilt the sewing machine downward. 3.Put the machine into the start condition, install so that there is a clearance of 0.5 mm for the operating lever pawl and the button clamp operating fork . 2.
Service Manual
Page 41
... its lowest position by a qualified technician. the center of the sewing machine should be carried out by rotating the pulley. ADJUSTMENT CAUTION Assembly and adjustment of the needle should only be approximately 2 mm. 35 CB3-B916A/B917A If any circumstances, as a result of the fixed ...knife and should be 0.1 - 0.2 mm. When the loop spreader has been advanced to observe all safety precautions. Wait until it is depressed by Brother.
... its lowest position by a qualified technician. the center of the sewing machine should be carried out by rotating the pulley. ADJUSTMENT CAUTION Assembly and adjustment of the needle should only be approximately 2 mm. 35 CB3-B916A/B917A If any circumstances, as a result of the fixed ...knife and should be 0.1 - 0.2 mm. When the loop spreader has been advanced to observe all safety precautions. Wait until it is depressed by Brother.
Service Manual
Page 42
... stitch control cam so that the pulley separates from the fixed knife. 5-9.Number of stitches adjustment cam Start the sewing machine by pressing the rear part of stitches adjustment cam should be 0.5 mm. CB3-B916A/B917A 36 5-7.Movable knife 5. The clearance between the vertical feed cam and the driving link, should be 0.5 mm...
... stitch control cam so that the pulley separates from the fixed knife. 5-9.Number of stitches adjustment cam Start the sewing machine by pressing the rear part of stitches adjustment cam should be 0.5 mm. CB3-B916A/B917A 36 5-7.Movable knife 5. The clearance between the vertical feed cam and the driving link, should be 0.5 mm...
Service Manual
Page 43
...between the pulley and the clutch plate should be adjusted so that the slider B edge and take -in A by using the eccentric shaft. < Sewing machine in start condition > Take-in C are aligned. B916A When the presser lifter pedal is depressed to obtain a backlash of the frame hole. ADJUSTMENT...presser lifter pedal is depressed to lift the button clamp, the slider B side should mm. 5. be 0.8 mm. 5-14.Slider < With the sewing machine in the stop condition > Take-in B Take-in thrust direction Pulley Ball presser plate 0.8 mm Clutch plate Nut Screw 424s 346s Adjust the ...
...between the pulley and the clutch plate should be adjusted so that the slider B edge and take -in A by using the eccentric shaft. < Sewing machine in start condition > Take-in C are aligned. B916A When the presser lifter pedal is depressed to obtain a backlash of the frame hole. ADJUSTMENT...presser lifter pedal is depressed to lift the button clamp, the slider B side should mm. 5. be 0.8 mm. 5-14.Slider < With the sewing machine in the stop condition > Take-in B Take-in thrust direction Pulley Ball presser plate 0.8 mm Clutch plate Nut Screw 424s 346s Adjust the ...