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Sewing unit
5. Tighten all 4 screws (2).
6. Connect the plug (1).
7. Tighten the potential bonding (4).
5.3 Checking the play between toothed rack and gear wheel
The play between the toothed rack and the gear wheel must be checked
on both sides of the machine. Because the structure is similar on both
sides, testing is described here for one side only as an example.
Fig. 72: Checking the play between toothed rack and gear wheel
(1) - Gear wheel
(2) - Toothed rack
Proper setting
There should be no play between the gear wheel (1) and toothed rack (2).
To check the play between toothed rack and gear wheel:
1. Loosen the screw (4).
2. Turn the nut (3) so that there is no play.
3. Tighten the screw (4).
4. Check the play along the entire length.
The carriage can be moved without excessive play or stiffness.
Service Instructions 911-211 - 02.0 - 10/2016
①
②
③
④
(3) - Nut
(4) - Screw
88
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