Service Manual 2 Knife Drive
2.3 Clutch/brake assembly maintenance
1/09 PERFECTA 115 / 132 / 168 / 225 – TS 13
PERFECTA Schneidemaschinenwerk GmbH D-02625 Bautzen Schäfferstr. 44 Tel.: +49-3591-556-131 to -133 Fax: +49 3591-556-139
The machine comes with carbon brushes 4 which have a length of 20 mm. As the
carbon brushes are subject to progressive wear readjust leg springs 3 on carbon
brush holder 5 from time to time to ensure that the brushes are pressed against the
slip ring by the correct force. The leg springs have five lock-in positions 1, and leg
spring 3 should be advanced one lock-in position per 4 mm of brush wear. Readjust-
ment to the next lock-in position will increase the pressing force by 2 N. For the first
readjustment, hang out wire leg 2, tilt it down 180° and lock it in. Further readjust-
ments should be done in clockwise sense.
Figure 5: As-supplied carbon brush holders. Figure 6: Readjusted carbon brush holders.
Caution:
When replacing worn-down carbon brushes, return the leg spring to its first
lock-in position, or the pressing force against the slip ring will be too high,
entailing damage to the same with the result of a total clutch replacement.
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