Assembly Procedures - Brother b831 Service Manual

ASSEMBLY PROCEDURES
Q] NEEDLE BAR ROCKING MECHANISM
OtI reservoir
Screw seal of stud
Procedures
1. Make the wick O he slack on the bottom of the arm oil groove.
2. After placing the needle bar rocking shaft O m the arm. insert into needle bar rocking connecting rod O-
* Place needle bar crank rod O onto needle bar crank O.
3. Install thread take-up lever 0 to thread take-up lever sliding block O.
4. Install stud O with screw Q.
• Insert stud O by lifting tip of oil reservoir.
[U LOWER SHAFT, THREAD TRIMMER AND ROTARY HOOK MECHANISM
(1) Lower Shaft (Part One)
m
•
Procedures
1. Turn the machine over.
2. Install rotary hook base R O and then rotary hook base L O.
* Install rotating hook bases O and O without the felt protruding,
3. Insert feed bar O between rotary hook bases O and O
4. Install horizontal feed shaft O with two screws 0.
* Install horizontal feed shaft O with screws 0 so that there is no left-right play.
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