Brush/Pad-Holder Deck Or Cylindrical Brush Deck Disassembly/Assembly; Brush Motor Electrical Input Check - Nilfisk-Advance BR 601 Service Manual

ENGLISH
BRUSHING SYSTEM

BRUSH/PAD-HOLDER DECK OR CYLINDRICAL BRUSH DECK DISASSEMBLY/ASSEMBLY

NOTE
The machine can be equipped with either the brush/pad-holder deck (69) or the cylindrical brush deck (82), according to
the following procedure.
To assemble/disassemble the deck it is not necessary to remove the brushes/pad-holders.
Disassembly
1. Drive the machine on a level fl oor.
2. Lower the deck (69) or (82) by pressing the switch (4).
3. Turn the ignition key (12) to "0".
4. (For brush/pad-holder deck) Disconnect the connector (71). (For cylindrical brush deck) Disconnect the connectors (71) and
(79), then install the protection cover (80) on the connector (79).
5. Disconnect the solution hose (72).
6. Remove the two split pins (74) and the split pin for the left lever fi xing.
7. Unscrew the knob (73) and remove the brush/pad-holder deck (69), or the cylindrical brush deck (82).
Assembly
8. Assemble the components in the reverse order of disassembly.

BRUSH MOTOR ELECTRICAL INPUT CHECK

WARNING!
This procedure must be performed by qualifi ed personnel only.
1. Drive the machine on a level fl oor.
2. Remove the brush (76) or (87), or the pad-holder (77) as shown in the User Manual.
3. Place two wooden shims (A) under the brush/pad-holder deck sides (B), or the cylindrical brush deck (C), as shown in the
fi gure. The wooden shim height must be 1.5 in (40 mm).
WARNING!
Keep the wooden shims (A) at a proper distance from the brush hubs (D).
4. Apply the amperometric pliers (E) on one cable (F) of the right motor (G), or on one cable (H) of the left motor (I).
5. Turn the ignition key (12) to "I".
6. Press the switch (4) to lower the deck (B) or (C) on the wooden shims (A). When lowering the deck, the brush motors (G) and
(I) start running, then check that the electrical input of the right (G) or left motor (I) is as follows:
• 3 to 5 A at 24 V, for the brush/pad-holder deck motors;
• 5 to 6 A, at 24 V, for the cylindrical brush deck motors.
Lift the deck (B) or (C) by pressing the switch (4). Turn the ignition key (12) to "0" and remove the amperometric pliers (E).
If the electrical input is higher, perform the following procedures to detect and correct the abnormal input:
• Check if there is dust or dirt (ropes, cables, etc.) on the brush/pad-holder hubs.
• 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).
7. Perform steps 2 and 3 in the reverse order.
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SERVICE MANUAL
909 6424 000(3)2007-12 BR 601 / BR 651 / BR 751 / BR 751 C