Lubricating The Arm; Lubricating The Rotary Hook - Brother LH4-B800E Instruction Manual

4. INSTALLATION

4-17-2. Lubricating the arm

NOTE:
* Be sure to lubricate the arm when first installing the machine and when the machine has not been used
for an extended period of time.
* When using the machine, check that the oil is visible through the oil cap (2). If it cannot be seen,
problems such as seizure of the mechanism may occur.
Apply 5-6 drops of oil to the oil inlet (1) at the top of the arm.

4-17-3. Lubricating the rotary hook

When first installing the machine and when the machine has not been used for an extended period of time,
remove the bobbin and add 2-3 drops of oil to the rotary hook race (1) before sewing.
(2)
26
(1)
Rotary hook lubrication adjustment
1. Remove the rubber stopper.
2. Turn the adjusting screw to adjust the lubrication
More
* Adjust so that approximately 10 drops of oil are
Less
2097Q
HE-8000
(2)
(1)
amount.
released when the sewing machine is run at a
speed of 4,000 rpm for three cycles to sew about
114 stitches. Use Kraft paper (2) or similar to
catch the oil drops. As a guide, the optimum
position can be obtained if the adjusting screw is
tightened as much as possible and then loosened
about two turns.
2095Q
2096Q