Brother b831 Service Manual page 54

G] NEEDLE BAR AND NEEDLE THREAD TAKE-UP
i
i
Remove the two screws O- and remove the needle bar frame stop O.
Remove screw O, and remove the felt O and felt bracket O'
Loosen screw O. and remove the needle bar frame driving shaft O-
Remove the needle bar frame assembly O-
(The needle bar O- needle bar clamp and needle bar frame slide block will come out.
Loosen screw ® and remove the thread take-up pin
(The wick will come out with the thread take-up pin ®.)
Remove the thread take-up ©.
Remove the thread take-up slide ©, and remove the needle bar crank rod
m FEED ASSEMBLY
m
Remove the two screws O. and remove the feed dog O-
Remove stop screw O and the washer, and remove the bobbin case opener O.
Tilt the machine.
Loosen the three screws O in the pinion gear O. and remove the rotary hook O
• The pinion gear O and opener link O will also come out.
Loosen screw and remove the feed bar lifting fork ®.
Loosen thefeed driving arm ® screw ®. needle barvibrating crank ©screw .and setcollar © screw © Remove the
feed driving shaft ©.
Loosen the feed driving arm ® screw needle bar vibrating crank ©screw ©. and setcollar © screw Remove the
feed driving shaft ©.
• The two set collars © will come off.
(Removal will be simplified if the feed driving arm © and needle bar vibrating crank © are opened with a wedge.)
• On model B838. move the rotary hook base to remove the feed driving shaft ©.
r-r-,r>Hr.l nCSO (r^r