26 9.4 Diameter Potentiometer Positioning Procedure; 27 9.5 Engine Belt Replacement - Bosch WBE 4140 Instructions De Réparation

9.4
Diameter potentiometer positioning procedu-
re
1. Remove only the carter without disconnecting the
board;
2. Start the balancing machine;
3. Enter the test menu;
4. Keep the value IN4 of the board shown;
5. unblock the nut on the shaft"A" (fig.18, pos.1);
Fig. 18:
6. Slightly extract the rod of the calliper;
7. Now lean the gauge against the shaft, turn the
potentiometer "B" as far as the value of 3000 ± 50;
Fig. 19:
8. Block the nut "A" on the shaft (fig.18, pos.1);
Robert Bosch GmbH
Replacement interventions | WBE 4140 | 41
9. Check the correct functioning during the stroke;
10. Close the machine;
11. Proceed with the calibration of gauges (chapter
Calibration menu).
9.5 Engine belt replacement
1. Remove the weights protection;
2. Remove the central centring flange (fig.20, pos.1)
and, once loosened the three screws (fig.20, pos.4)
and the two screws (fig.20, pos.2);
3. Remove the pin cover in fig.20,pos.3 and the side
cover of the motor closing in fig.20, pos. 5;
Fig. 20:
4. Remove the belt of the motor by loosening the three
side screws (fig.21, pos. 1) and the screw (fig.21,
pos.2) in order to loosen the belt;
Fig. 21: Belt replacement
5. adjust the tension of the belt (by tightening the
adjustment screw) until it possible to manually
rotate by 90°.
"
Belt tensioning check.
en
;
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1 695 655 779 2010-11-9