Maintenance
110 Service Instructions 878-M PREMIUM - 03.0 - 10/2019
18.2.2 Setting the hook lubrication
Fig. 81: Setting the hook lubrication
The optimal oil quantity for hook lubrication is specified by the factory.
Hold a piece of blotting paper next to the hook and step on the pedal.
Proper setting
1. The lubricating nipple (3) is separated from the hook by gap
(A) = 0.3 mm.
2. The adjusting screw (2) should protrude from the lubricating nipple by
0.5 mm.
3. After sewing a path of approx. 1 m long, the blotting paper is evenly
sprayed with a thin layer of oil.
1. Open the hook cover.
2. Loosen the threaded pin (1) and set the height of the nipple (3) to create
a gap 0.3 mm wide.
3. Tighten the threaded pin (1).
4. Turn the screw (2):
• Releasing more oil: turn counterclockwise
• Releasing less oil: turn clockwise
Important
The released amount of oil does not change until the operating time has
run a few minutes. Sew for several minutes before you check the setting
again.
(1) - Threaded pin
(2) - Adjusting screw
(3) - Lubricating nipple
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