ENGLISH
SERVICE MANUAL
70
909 6424 000(3)2007-12
BR 601 / BR 651 / BR 751 / BR 751 C
DRIVE SYSTEM
SPEED REDUCTION SENSOR CHECK/ADJUSTMENT
Check
According to the procedure shown in the User Manual, lift the brush/pad-holder deck and the squeegee, then start the
machine, drive it at high speed, make turns both on the right and on the left, and check the following:
When the steering wheel (14) is turned for more than 1/4 turn (approximately), both on the right and on the left, the
machine speed automatically decreases consistently.
The machine is equipped with an anti-tilting safety system that reduces the speed when turning, irrespectively of the pressure
on the pedal.
The reduction of speed when turning is not a malfunction but a characteristic that improves the machine stability in every
condition.
If necessary, adjust the speed reduction sensor according to the following procedure.
Adjustment
Place the machine on a hoisting system (if available). Otherwise, drive the machine on a level fl oor.
Turn the ignition key (12) to "0".
Clean the fl ange (A) in the area where the speed reduction sensor (B) operates.
Turn the steering wheel until the sensor (B) moves out of the deactivation area (C).
Temporarily turn the ignition key (12) to “I” with care, and check the area (D) to see if the sensor is active.
Turn the ignition key (12) to "0".
Turn the steering wheel to the right and to the left and check that the maximum distance between the sensor (B) and the fl ange
(A) is 0.059 in (1.5 mm). Check that the sensor (B) never comes into contact with the fl ange (A).
If necessary, loosen the nuts (E) and adjust the position of the sensor (B). After adjusting, tighten the nuts (E).
Remove the machine from the hoisting system and check again (steps 1 and 2).
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