Brother 2340CV Service Manual Download Page 13

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HOW TO ADJUST......

Position of looper thread take-up

1. Loosen the thread take-up set screw.

2. Turn the pulley until the thread take-up is at its highest position, and adjust the distance from the F-cover hinge to

the thread take-up as shown in the illustration below.

3. After completing adjustment, tighten the DL thread take-up set screw.

F-cover hinge plate

43.0 - 45.0 mm

39.5 - 41.5 mm

Set screw

DL Thread take-up lever B

DL Thread take-up lever A

Upper of F-cover hinge plate

Summary of Contents for 2340CV

Page 1: ......

Page 2: ... the double chain looper 5 Timing of the lowerlooper 6 Height of feed dog with a differential feed dog 7 Feed timing 8 Height of presser bar 9 Thread tension adjustment 10 Position of thread take up 11 Position of looper thread take up 12 Adjustment and replacement for the timing belt 13 Changing the light bulb 14 ...

Page 5: ...ing position the double chain looper correctly 2 Too much adjustment will cause damage to other parts or cause the needle to skip stitches How to use the gauge 1 Position the gauge as shown in the illustration 2 Firmly tighten the screw Double chain looper Set screw DL lever 7mm ...

Page 6: ...ition place the pointed end of the double chain looper against the right side of the needle The point of the double chain looper should be between 0 0 05 mm from the needle 2 Firmly tighten bolt 5 16 Right needle 3 mm 0 2 Movable needle guard Movable needle guard Double chain looper Left needle Three needle models 0 0 05 mm Bolt 5 16 0 0 05 mm 0 0 05 mm ...

Page 7: ...er 2 Lower the needle bar to its lowest position 3 Position the spacer and gauge and tighten the screw 4 Remove the spacer 5 Raise the needle bar until the needle clamp contacts the gauge Continue making the adjustment described on the previous page The spacer is 3 0 mm thick Presser bar Gauge Spacer 3 4 2 Needle bar 3 0 mm 5 Gauge Needle clamp ...

Page 12: ...UST Position of thread take up 1 Lower the needle to its lowest position 2 Loosen the set screw and position the thread take up below the thread retainer by 0 1 5 mm Thread retainer 0 1 5 mm Thread take up Set screw ...

Page 13: ... at its highest position and adjust the distance from the F cover hinge to the thread take up as shown in the illustration below 3 After completing adjustment tighten the DL thread take up set screw F cover hinge plate 43 0 45 0 mm 39 5 41 5 mm Set screw DL Thread take up lever B DL Thread take up lever A Upper of F cover hinge plate ...

Page 15: ...crew pull up the light bulb cover and remove it Take out the light bulb and replace it with a new one After replacing the light bulb assemble the parts in the reverse order Caution Always be sure to turn off the power before carrying out the following operation Screw bind M 4 6 Lamp cover Light bulb cover Screw bind M 4 6 Light bulb Light bulb cover ...

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