ENGLISH
SERVICE MANUAL
32
909 6424 000(3)2007-12
BR 601 / BR 651 / BR 751 / BR 751 C
BRUSHING SYSTEM
CHECK/REPLACEMENT/ADJUSTMENT OF DRIVING BELTS BETWEEN MOTORS AND CYLINDRICAL
BRUSHES
Check
Drive the machine on a level fl oor.
Turn the ignition key (12) to "0".
On both sides of the machine, unscrew the knobs (A) and remove the side skirt assembly (B).
Remove the screw (C), then remove the covers (D).
Loosen the nuts (E) and remove the covers (F).
Visually inspect the belt (G) for integrity, cuts, tears or cracks and, if necessary, replace it according to the following procedure.
Check the belt tension (G) according to the following procedure.
Replacement
If the belt (G) must be replaced, loosen the nut (J) and move the pulley (K) to loosen the belt.
Tension the belt (G) according to the following procedure.
Belt tensioning
Check the tension of the belt (G) between motor and brush. The tension is correct:
when pressing the belt in its centre with a force of 22 lb (10 kg) (H), the belt bends for 0.35 in (9 mm).
If necessary, tension the belt according to the following procedure:
Loosen the nut (J) and adjust the position of the pulley (K). When tensioning procedure has been performed, tighten the nut
(J).
Repeat step 10.
Reset
Perform steps 3 to 5 in the reverse order.
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