Brother DB2-DD7100, Service Manual

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4. MECHANICAL DESCRIPTIONS
SL-710A
9
DD7100
When adding the lubricating oil for the first time after unpacking the sewing machine, pour 120 ml of lubricating oil in
through oil filler hole (1). The oil gauge in the oil gauge window (2) will rise as far as the upper reference line. (Refer to
page 59 for details on the lubrication method.)
1. The lubricating oil that is poured into the oil filler hole (1) is stored in the oil tank (3).
2. The lubricating oil in the oil tank (3) is drawn up by the plunger pump (4).
3. The lubricating oil that is drawn up by the plunger pump (4) is transferred to parts such as the thread take-up lever and
needle bar by oil tubes and wicks.
* The rotary hook lubrication amount can be adjusted using the adjusting screw (6). (Refer to page 73.)
(2)
(1)
(6)
(4)
(6)
(4)
(3)
1638M 1635M 1634M
1637M
Used oil
Upper reference line
Oil gauge
Lower reference line
(2)
Oil gauge window
Plunger pump
Oil gauge
Increase Decrease
To rotary hook and rotary
hook shaft
To upper shaft, thread take-up
lever, needle bar, etc.