Adjustments - Brother RH-9820 Service Manual

7. ADJUSTMENTS

7. ADJUSTMENTS
Maintenance and inspection of the sewing machine
should only be carried out by a qualified technician.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn off the power switch and disconnect the power
cord at the following times.
If this is not done, the sewing machine may operate if
the start switch is pressed by mistake, which could
result in serious injury.
• When carrying out inspection, adjustment and
maintenance
• When replacing consumable parts such as the
loopers and knife
7-1. Adjusting the heights of the spreaders and loopers
Spreader height
(When viewed from directly above)
1. Remove the work clamp plates. (Refer to "3-19. Installing and removing the work clamp plates" in the instruction manual.)
2. Check the following.
•
Check that the spring (3) causes the spreader L (1) to move smoothly without any play between the spreader stopper L
(4) and the LS holder base (5).
•
Check that the spring (3) causes the spreader R (2) to move smoothly without any play between the spreader stopper R
(6) and the LS holder base (5).
3. If the spreaders do not move smoothly or if there is play in their movement, loosen the set screws (7) and move the spreader
stopper L (4) or spreader stopper R (6) up or down to adjust.
4. Once adjustment is complete, securely tighten the set screws (7).
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CAUTION
Disconnect the air hoses from the air supply and wait
for the needle on the pressure gauge to drop to "0"
before carrying out inspection, adjustment and repair
of any parts which use the pneumatic equipment.
If the power switch and air need to be left on when
carrying out some adjustment, be extremely careful to
observe all safety precautions.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly before
using the machine.
RH-9820
(When viewed from the front)
0481B