Brother LK3-B448E instruction manual Replacement the V-belt, Adjustment

10. Adjustment

10-17. Replacement the V-belt

1. Then remove the belt cover.

r	(Refer to “Tilting back the machine head” on page 35).
2.	Remove the motor back cover q with the screws w
q	and the flat washers e.

3. Remove the wood screw t and washers y securing

e	the motor cover r, and remove the table.
w

y

t

i

u

o

Approx. 1

A mm

B

		belt
e	Approx. 9 - 10 mm
	10N

4.Gently tilt back the machine head, and then place the V-belt u remove the V grooves on the machine head pulley i and the motor pulley o.

NOTE:

After tilting back the machine head, do not push the face plate side or the pulley side from above.

5.Gently return the machine head to its original position replace V-belt.

*Be careful not to clamp the cords at this time.

6.Adjust the belt tension by moving the tension pulley assembly to the right and left so that there is 9-10 mm of deflection in the V-belt q when it is gently pushed in the middle with a force of approximately 10 N. After adjusting, tighten the bolt A to secure the left pulley assembly.

7.Move the right tension pulley so that there is a gap of about 1 mm between it and the V-belt q, and then tighten the bolt B to secure the rigth pulley assem- bly.

8.After adjustment, install the belt cover and the motor cover.

LK3-B448E MARKII/BA-16

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