SERVICE MANUAL
ENGLISH
BR 601 / BR 651 / BR 751 / BR 751 C
909 6424 000(3)2007-12
59
DRIVE SYSTEM
DRIVE SYSTEM MOTOR ELECTRICAL INPUT CHECK (Machines after January 2007)
WARNING!
This procedure must be performed by qualifi ed personnel only.
Drive the machine on a level fl oor.
Turn the ignition key (12) to "0".
Remove the brush/pad-holder deck (16) or the cylindrical brush deck (17) (see the procedure in the relevant paragraph).
Turn the front wheel (A) completely to the left.
Apply proper wedges to right and left rear wheels (43), so that the machine cannot move when the front wheel (A) is lifted.
With the help of an assistant, slightly lift the front part of the machine and apply to the frame brackets (B) two proper wooden
shims (C) high enough to keep the front wheel (A) lifted for about 1.18 in (3 cm) from the fl oor.
WARNING!
When performing the following procedure, pay attention to the rotation of the driving wheel (A).
Apply the amperometric pliers (D) on the positive cables (red) (E). The amperometric pliers must not touch the wheel.
Seat on the machine driver's seat (37).
Turn the ignition key (12) to "I".
Drive the machine at the maximum forward speed by pressing the pedal (15) and check that the electrical input is 10 - 15 A at
24 V. Release the pedal (15). Turn the ignition key (12) to "0" and remove the amperometric pliers (D).
If the electrical input is higher, perform the following procedures to detect and correct the abnormal input:
Check if there is dust or debris preventing the wheel rotation.
Check if the electromagnetic brake slows down the wheel when the drive system motor is operating (remove the
electromagnetic brake and repeat the electrical input check (see the procedure in the relevant paragraph)).
Check the motor carbon brushes (see the procedure in the relevant paragraph).
If necessary, disassemble the motor (see the procedure in the relevant paragraph), and check the condition of all its
components.
If the above-mentioned procedures do not lead to a correct electrical input, the motor must be replaced (see the procedure in
the relevant paragraph).
Perform steps 3 to 6 in the reverse order.
D
B
C
A
E
C
B
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