Baby Lock BL7800 Service Manual page 16

50. Attach the thread take-up shaft using the screw.
51. Attach the presser spring using the collar and screw.
52. Insert and attach the presser foot lifter using the presser lifter shaft.
53. Insert and attach the presser bar into the presser bar clamp.
54. Attach the presser bar spring onto the presser bar clamp.
55. Attach the inner rotary hook bracket using the screw.
56. Attach the lower thread guide assembly using the screw.
Assembly Points
50. The screw (48) used to install the thread take-up lever shaft should have a 14mm screw.
* The thread take-up lever shaft should be installed so that there is no gap between the right side of the
thread take-up and the stop ring. If there is a large gap, the right and left clearance may generate an
irregular noise (thread take-up lever noise).
55. Install the inner rotary hook bracket assembly (Firmly tighten the screw to make no space between (C) and
the arm bed so that the inner rotary hook bracket assembly dose not rotate.)
* When the inner rotary hook bracket assembly is installed, adjust the position where rotation is prevented.
(Refer to (A).)
* If there is a small rotation prevention amount, the inner rotary hook may slip and start rotating causing
damage to the inner rotary hook breaking the needle.
56. Lower there guide assembly installation procedure.
(1) Insert the projection (B) on the lower thread guide assembly into the guide hole of the arm-bed.
(Insert the projection while checking that the inner rotary hook is correctly positioned.)
(2) Move the lower thread guide assembly toward the right without bending the lower thread guide arm
assembly to install it.
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