Brother b831 Service Manual page 52

(U TENSION RELEASE LEVER
O@0 @ o
1. Remove set screw O. and remove the triple eye thread guide O-
2. Loosen set screw O. and remove the thread take-up spring regulator O and tension release lever rod 0.
3. Remove set screw O, and remove the thread take-up spring stopper O.
Refer to the above diagram for tension release lever disassembly.
d] PRESSER FOOT AND WALKING BAR
[1] PRESSER FOOTO
1. Loosen screw O and remove the knee lifter roller bracket O.
2. Remove cotter pin 0 and remove knee lifter complying bar 0.
3. Remove stud screw 0 and remove the knee lifter connecting rod 0.
4. Remove stud screw 0. and remove knee lifter lever spring 0 and knee lifter lever 0.
5. Loosen the pressure regulating thumb screw 0. remove screw 0, and remove the presser bar flat spring ®.
6. Remove presser bar lifter guide ®.
* Disassemble the presser foot assembly after disassembling the walking bar assembly.
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