Brother b831 Service Manual page 60

[2] PRESSER FOOT O
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1. Tightenthe presser foot adjustment screw O with the end of the presser plate spring O connected to the presser bar
guide bracket O-
2. Install the knee lifter lifting lever O and spring O with the screw O.
Hook the end of the knee lifter lifting lever spring O on the spring peg.
3. Install knee lifter lifting guide O-
4. Secure the knee lifter connecting rod O with step screw O-
5. Slide the knee lifter complying bar 0 onto the knee lifter connecting rod O. and secure it with the cotter pin ®.
6. Secure the knee lifter roller bracket ® to the knee lifter complying bar with set screw ®.
Presser Foot Pressure Adjustment
★
Adjust the presser foot pressure with presser foot adjustment screw (D
0 TENSION RELEASE LEVER
0 o
1. Tighten set screw O so both ends of the thread take-up spring stopper O are level.
2. Fit the tension release lever rod 0 in place.
3. Secure the upper tension control assembly O with set screw O-
4. Secure the triple eye thread guide O with the set screw O-
* Assemble the upper tension control assembly O as shown in the figure above.
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