Crescent BA611 User manual

BA611
www.crescentindustrial.co.uk
Service
Manual

SERVICE MANUAL ENGLISH
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551 909 6756 000(5)2010-03 1
TABLE OF CONTENTS
GENERAL INFORMATION......................................................................................................................................... 4
CONVENTIONS ..................................................................................................................................................... 4
MACHINE LIFTING ................................................................................................................................................ 4
MACHINE TRANSPORTATION ............................................................................................................................. 4
OTHER REFERENCE MANUALS ......................................................................................................................... 4
SAFETY ...................................................................................................................................................................... 5
SYMBOLS .............................................................................................................................................................. 5
GENERAL INSTRUCTIONS .................................................................................................................................. 5
TECHNICAL DATA (For BA 451, BA 451D, BA 531, BA 531D).............................................................................. 8
TECHNICAL DATA (For CA 451, CA 531).............................................................................................................. 9
TECHNICAL DATA (For BA 551, BA 551D, BA 551CD, BA 611D) ....................................................................... 10
TECHNICAL DATA (For CA 551).......................................................................................................................... 11
DIMENSIONS BA 451 - DIMENSIONS BA 451D................................................................................................. 12
DIMENSIONS BA 531 - DIMENSIONS BA 531D................................................................................................. 13
DIMENSIONS CA 451 - DIMENSIONS CA 531 ................................................................................................... 14
DIMENSIONS BA 551 - DIMENSIONS BA 551D................................................................................................. 15
DIMENSIONS BA 551CD - DIMENSIONS BA 611D............................................................................................ 16
DIMENSIONS CA 551 ......................................................................................................................................... 17
MAINTENANCE........................................................................................................................................................ 18
SCHEDULED MAINTENANCE TABLE (For BA 451, BA 451D, BA 531, BA 531D,
BA 551, BA 551D, BA 551CD, BA 611D).............................................................................................................. 18
SCHEDULED MAINTENANCE TABLE (For CA 451, CA 531, CA 551)............................................................... 18
MACHINE NOMENCLATURE (For BA 451, BA 451D, BA 531, BA 531D) .......................................................... 19
MACHINE NOMENCLATURE (For BA 551, BA 551D, BA 551CD, BA 611D)...................................................... 22
MACHINE NOMENCLATURE (For CA 451, CA 531) .......................................................................................... 25
MACHINE NOMENCLATURE (For CA 551) ........................................................................................................ 27
SOLUTION/CLEAN WATER SUPPLY SYSTEM ...................................................................................................... 29
SOLUTION/CLEAN WATER TANK AND SUPPLY SYSTEM CLEANING (All models)........................................ 29
SOLUTION FILTER CLEANING (For BA 451, BA 451D, BA 531, BA 531D, CA 451,
CA 531, without EcoFlex™ system) ..................................................................................................................... 29
SOLUTION FILTER CLEANING (For BA 551, BA 551D, BA 551CD, BA 611D, CA 551,
without EcoFlex™ system)................................................................................................................................... 30
SOLENOID VALVE DISASSEMBLY/ASSEMBLY (For BA 451, BA 451D, BA 531,
BA 531D, CA 451, CA 531) .................................................................................................................................. 31
SOLENOID VALVE DISASSEMBLY/ASSEMBLY (For BA 551, BA 551D, BA 551CD,
BA 611D, CA 551) ................................................................................................................................................ 32
TROUBLESHOOTING ......................................................................................................................................... 33
ECOFLEX™ SYSTEM .............................................................................................................................................. 34
CLEAN WATER FILTER CLEANING (For BA 451D, BA 531D) ........................................................................... 34
CLEAN WATER FILTER CLEANING (For BA 551D, BA 551CD, BA 611D)......................................................... 35
DETERGENT TANK CLEANING (For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) .............................. 36
ECOFLEX™ SYSTEM DRAINING (For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ........................... 37
WATER PUMP DISASSEMBLY/ASSEMBLY (For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ............ 38
DETERGENT PUMP AND CHECK VALVE DISASSEMBLY/ASSEMBLY (For BA 451D, BA 531D) ................... 39
DETERGENT PUMP AND CHECK VALVE DISASSEMBLY/ASSEMBLY (For BA 551D,
BA 551CD, BA 611D) ........................................................................................................................................... 41
TROUBLESHOOTING ......................................................................................................................................... 43

ENGLISH SERVICE MANUAL
2909 6756 000(5)2010-03 BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551
BRUSHING SYSTEM................................................................................................................................................ 44
BRUSH/PAD CLEANING ..................................................................................................................................... 44
BRUSH/PAD-HOLDER/CYLINDRICAL BRUSH DECK DISASSEMBLY/ASSEMBLY
(For BA 451, BA 451D, BA 531, BA 531D) ........................................................................................................... 45
BRUSH/PAD-HOLDER/CYLINDRICAL BRUSH DECK DISASSEMBLY/ASSEMBLY
(For BA 551, BA 551D, BA 551CD, BA 611D) ...................................................................................................... 46
BRUSH/PAD-HOLDER DECK DISASSEMBLY/ASSEMBLY (For CA 451, CA 531, CA 551) .............................. 47
BRUSH MOTOR ELECTRICAL INPUT CHECK (For BA 451, BA 451D, BA 531, BA 531D)............................... 49
BRUSH MOTOR ELECTRICAL INPUT CHECK (For BA 551, BA 551D) ............................................................ 51
BRUSH MOTOR ELECTRICAL INPUT CHECK (For BA 551CD)........................................................................ 53
BRUSH MOTOR ELECTRICAL INPUT CHECK (For BA 611D) .......................................................................... 54
BRUSH MOTOR ELECTRICAL INPUT CHECK (For CA 451, CA 531, CA 551) ................................................. 55
BRUSH MOTOR CARBON BRUSH CHECK/REPLACEMENT
(For BA 451, BA 451D, BA 531, BA 531D) ........................................................................................................... 57
BRUSH MOTOR CARBON BRUSH CHECK/REPLACEMENT (For BA 551, BA 551D) ..................................... 59
BRUSH MOTOR CARBON BRUSH CHECK/REPLACEMENT (For BA 551CD) ................................................ 61
BRUSH MOTOR CARBON BRUSH CHECK/REPLACEMENT (For BA 611D) ................................................... 62
BRUSH MOTOR DISASSEMBLY/ASSEMBLY
(For BA 451, BA 451D, BA 531, BA 531D, BA 551, BA 551D) ............................................................................. 63
BRUSH MOTOR DISASSEMBLY/ASSEMBLY (For BA 551CD).......................................................................... 64
BRUSH MOTOR DISASSEMBLY/ASSEMBLY (For BA 611D)............................................................................. 65
BRUSH MOTOR DISASSEMBLY/ASSEMBLY (For CA 451, CA 531, CA 551) ................................................... 66
CHECK/REPLACEMENT/ADJUSTMENT OF DRIVING BELTS FROM MOTORS
TO CYLINDRICAL BRUSHES (For BA 551CD)................................................................................................... 67
BRUSH ENABLING MICROSWITCH ADJUSTMENT/REPLACEMENT
(For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ................................................................................... 69
TROUBLESHOOTING ......................................................................................................................................... 74
RECOVERY WATER SYSTEM ................................................................................................................................. 72
RECOVERY WATER TANK AND VACUUM GRID CLEANING, AND
COVER GASKET CHECK (All models) ............................................................................................................... 72
SQUEEGEE CLEANING/CHECK/REPLACEMENT AND SQUEEGEE
BLADE REPLACEMENT (All models).................................................................................................................. 73
VACUUM SYSTEM MOTOR FILTER CLEANING (All models) ........................................................................... 75
VACUUM SYSTEM MOTOR ELECTRICAL INPUT CHECK
(For BA 451, BA 451D, BA 531, BA 531D, BA 551, BA 551D, BA 551CD, BA 611D) .......................................... 76
VACUUM SYSTEM MOTOR ELECTRICAL INPUT CHECK (For CA 451, CA 531, CA 551) .............................. 77
VACUUM SYSTEM MOTOR CARBON BRUSH CHECK/REPLACEMENT (All models) .................................... 79
VACUUM SYSTEM MOTOR DISASSEMBLY/ASSEMBLY (All models).............................................................. 80
SQUEEGEE SPRING CHECK/REPLACEMENT (All models, with aluminium squeegee) .................................. 82
TROUBLESHOOTING ......................................................................................................................................... 83
DRIVE SYSTEM........................................................................................................................................................ 84
SPEED POTENTIOMETER ADJUSTMENT/REPLACEMENT
(For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ................................................................................... 84
MAXIMUM SPEED POTENTIOMETER DISASSEMBLY/ASSEMBLY
(For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ................................................................................... 86
DRIVE SYSTEM MOTOR ELECTRICAL INPUT CHECK
(For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ................................................................................... 88
DRIVE SYSTEM MOTOR CARBON BRUSH CHECK AND REPLACEMENT
(For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ................................................................................... 90
DRIVE SYSTEM MOTOR-DIFFERENTIAL DISASSEMBLY/ASSEMBLY
(For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ................................................................................... 91
TROUBLESHOOTING ......................................................................................................................................... 92
DRIVE SYSTEM ELECTRONIC BOARD DIAGNOSTIC TABLE ......................................................................... 93

SERVICE MANUAL ENGLISH
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551 909 6756 000(5)2010-03 3
OTHER SYSTEMS.................................................................................................................................................... 94
SCREW AND NUT TIGHTENING CHECK (All models)....................................................................................... 94
ELECTRICAL SYSTEM ............................................................................................................................................ 95
MACHINE WORKING HOUR CHECK (For BA 451, BA 451D, BA 531, BA 531D,
BA 551, BA 551D, BA 551CD, BA 611D, equipped with optional hour counter)................................................... 95
MACHINE WORKING HOUR CHECK (For CA 451, CA 531, CA 551,
equipped with optional hour counter) ................................................................................................................... 95
POWER SUPPLY CABLE CHECK (For CA 451, CA 531, CA 551) ..................................................................... 95
BATTERY CHARGE AND MAINTENANCE (All models) ..................................................................................... 95
BATTERY DISASSEMBLY/ASSEMBLY (For BA 451, BA 451D; BA 531, BA 531D,
BA 551, BA 551D, BA 551CD, BA 611D).............................................................................................................. 96
BATTERY TYPE SETTING (WET OR GEL) (For BA 451, BA 531, BA 551)........................................................ 97
BATTERY TYPE SETTING (WET OR GEL) (For BA 451D, BA 531D, BA 551D,
BA 551CD, BA 611D) ........................................................................................................................................... 98
FUSE CHECK/REPLACEMENT (For BA 451, BA 451D, BA 531, BA 531D, BA 551,
BA 551D, BA 551CD, BA 611D) ........................................................................................................................... 99
FUSE CHECK/REPLACEMENT (For CA 431, CA 531, CA 551) ....................................................................... 100
BRUSH MOTOR ELECTROMAGNETIC SWITCH DISASSEMBLY/ASSEMBLY
(For BA 451, BA 451D, BA 531, BA 531D, BA 551, BA 551D, BA 551CD, BA 611D) ........................................ 101
DRIVE SYSTEM ELECTRONIC BOARD DISASSEMBLY/ASSEMBLY
(For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ................................................................................. 103
FUNCTION ELECTRONIC BOARD DISASSEMBLY/ASSEMBLY
(For BA 451, BA 451D, BA 531, BA 531D, BA 551, BA 551D, BA 551CD, BA 611D) ........................................ 105
WATER FLOW CONTROL ELECTRONIC BOARD DISASSEMBLY/ASSEMBLY
(For CA 451, CA 531, CA 551) ........................................................................................................................... 106
TROUBLESHOOTING ....................................................................................................................................... 107
COMPONENT LAYOUT (For BA 451, BA 531, BA 551) .................................................................................... 108
WIRING DIAGRAM (For BA 451, BA 531, BA 551)............................................................................................ 109
COMPONENT LAYOUT (For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D).......................................... 110
WIRING DIAGRAM (For BA 451D, BA 531D, BA 551D, BA 551CD, BA 611D) ................................................. 112
COMPONENT LAYOUT (For CA 451, CA 531, CA 551).................................................................................... 113
WIRING DIAGRAM (For CA 451, CA 531, CA 551) ........................................................................................... 114
EB1 ELECTRONIC BOARD CONNECTOR PINS
(for BA 451, BA 451D, BA 531, BA 531D, BA 551, BA 551D, BA 551CD, BA 611D).......................................... 115

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
4909 6756 000(5)2010-03 BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551
GENERAL INFORMATION
CONVENTIONS
Forward, backward, front, rear, left or right are intended with reference to the operator’s position, that is to say in driving position
with the hands on the handlebar.
MACHINE LIFTING
WARNING!
Do not work under the lifted machine without supporting it with safety stands.
MACHINE TRANSPORTATION
WARNING!
Before transporting the machine, make sure that:
All covers are closed.–
The ignition key is removed.–
The machine is securely fastened to the means of transport.–
OTHER REFERENCE MANUALS
The following manuals are available at Nilsk Literature Service Department:
BA 451 - BA 451D - BA 531 - BA 531D–: User Manual - Form Number 909 6748 000
BA 451 - BA 451D - BA 531 - BA 531D–: Spare Parts List - Form Number 909 6749 000
BA 551, BA 551D, BA 551CD, BA 611D–: User Manual - Form Number 909 6752 000
BA 551, BA 551D, BA 551CD, BA 611D–: Spare Parts List - Form Number 909 6753 000
CA 451 - CA 531–: User Manual - Form Number 909 6750 000
CA 451 - CA 531–: Spare Parts List - Form Number 909 6751 000
CA 551–: User Manual - Form Number 909 6754 000
CA 551–: Spare Parts List - Form Number 909 6755 000
Installation instructions counter hour kit - Form Number 9096952000–
Installation instructions for extra pressure kit - Form Number 909 6759 000–
Installation instructions for splash guard kit - Form Number 909 6745 000–
Installation instructions for battery charger kit - Form Number 909 6746 000–
Installation instructions for EcoFlex™ kit Delta 6 - Form Number 9096936000–
Installation instructions for EcoFlex™ kit Delta 7- Form Number 909 6747 000–

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551 909 6756 000(5)2010-03 5
SAFETY
The following symbols indicate potentially dangerous situations. Always read this information carefully and take all necessary
precautions to safeguard people and property.
SYMBOLS
DANGER!
It indicates a dangerous situation with risk of death for the operator.
WARNING!
It indicates a potential risk of injury for people or damage to objects.
CAUTION!
It indicates a caution related to important or useful functions.
Pay careful attention to the paragraphs marked by this symbol.
NOTE
It indicates a remark related to important or useful functions.
CONSULTATION
It indicates the necessity to refer to the User Manual before performing any procedure.
GENERAL INSTRUCTIONS
Specic warnings and cautions to inform about potential damages to people and machine are shown below.
DANGER!
This machine must be used by properly trained operators only. Children or disabled people cannot use this–
machine.
Do not wear jewels when working near electrical components.–
Do not work under the lifted machine without supporting it with safety stands.–
Do not operate the machine near toxic, dangerous, ammable and/or explosive powders, liquids or –
vapours: This machine is not suitable for collecting dangerous powders.
DANGER! (For BA 451, BA 451D, BA 531, BA 531D, BA 551, BA 551D, BA 551CD, BA 611D)
Before performing any cleaning, maintenance, repair or replacement procedure disconnect the battery–
connector and remove the ignition key.
Keep the battery far from sparks, ames and incandescent material. During the normal operation explosive –
gases are released.
Battery charging produces highly explosive hydrogen gas. Keep the tanks lifted during battery charging–
and perform this operation in well-ventilated areas and away from naked ames.
DANGER! (For CA 451, CA 531, CA 551)
Always disconnect the power supply cable when the machine is not in use, before performing maintenance–
procedures, before replacing the brush/pad-holder and before opening any access panel.

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
6909 6756 000(5)2010-03 BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551
WARNING!
To avoid any unauthorized use of the machine, remove the ignition key.–
Do not leave the machine unattended without being sure that it cannot move independently.–
Always protect the machine against the sun, rain and bad weather, both under operation and inactivity–
condition. Store the machine indoors, in a dry place: This machine must be used in dry conditions, it must
not be used or kept outdoors in wet conditions.
Before using the machine, close all doors and/or covers.–
Do not allow to be used as a toy. Close attention is necessary when used near children.–
Use only as shown in this Manual. Only Nilsk recommended accessories must be used.–
Take all necessary precautions to prevent hair, jewels and loose clothes from being caught by the machine–
moving parts.
Do not use the machine on slopes with a gradient exceeding the specications.–
Do not use the machine in particularly dusty areas.–
While using this machine, take care not to cause damage to people or objects.–
Do not bump into shelves or scaffoldings, especially where there is a risk of falling objects.–
Do not put any can containing uids on the machine.–
The machine working temperature must be between +32°F and +104°F (0°C and +40°C).–
The machine storage temperature must be between +32°F and +104°F (0°C and +40°C).–
The humidity must be between 30% and 95%.–
When using oor cleaning detergents, follow the instructions on the labels of the detergent bottles.–
To handle oor cleaning detergents, wear suitable gloves and protections.–
Do not use the machine as a means of transport.–
Do not allow the brushes to operate while the machine is stationary to avoid damaging the oor.–
In case of re, use a powder re extinguisher, not a water one.–
Do not tamper with the machine safety guards and follow the ordinary maintenance instructions–
scrupulously.
Do not allow any object to enter into the openings. Do not use the machine if the openings are clogged.–
Always keep the openings free from dust, hairs and any other foreign material which could reduce the air
ow.
Do not remove or modify the plates afxed to the machine.–
This machine cannot be used on roads or public streets.–
Pay attention during machine transportation when temperature is below freezing point. The water in the–
recovery tank or in the hoses could freeze and seriously damage the machine.
Use brushes and pads supplied with the machine and those specied in the User Manual. Using other –
brushes or pads could reduce safety.
In case of machine malfunctions, ensure that these are not due to lack of maintenance. Otherwise, request –
assistance from the authorised personnel or from an authorised Service Center.
If parts must be replaced, require ORIGINAL spare parts from a Dealer or Authorised Retailer.–
To ensure machine proper and safe operation, the scheduled maintenance shown in the relevant chapter of–
this Manual, must be performed by the authorised personnel or by an authorised Service Center.
Carefully read all the instructions before performing any maintenance/repair procedure.–
Do not wash the machine with direct or pressurised water jets, or with corrosive substances.–
The machine must be disposed of properly, because of the presence of toxic-harmful materials (batteries,–
etc.), which are subject to standards that require disposal in special centres (see the User Manual).

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551 909 6756 000(5)2010-03 7
WARNING! (For BA 451, BA 451D, BA 531, BA 531D, BA 551, BA 551D, BA 551CD, BA 611D)
Do not pull or carry the machine by the battery charger cable and never use the battery charger cable as–
a handle. Do not close a door on the battery charger cable, or pull the battery charger cable around sharp
edges or corners. Do not run the machine on the battery charger cable.
Keep the battery charger cable away from heated surfaces.–
Do not charge the batteries if the battery charger cable or the plug are damaged. If the machine is not–
working as it should, has been damaged, left outdoors or dropped into water, return it to the Service Centre.
Before using the battery charger, ensure that frequency and voltage values, indicated on the machine serial –
number plate, match the electrical mains voltage.
Do not smoke while charging the batteries.–
To reduce the risk of re, electric shock, or injury, do not leave the machine unattended when it is plugged –
in. Before performing any maintenance procedure, disconnect the battery charger cable from the electrical
mains.
WARNING! (For CA 451, CA 531, CA 551)
The machine power supply cable is grounded and the relevant plug is grounded too. In case of machine–
malfunction or breakdown, grounding connection reduces the risk of electric shock.
The power supply cable plug must be connected to an appropriate outlet, which is grounded according to–
law in force. Improper connection can cause electric shock.
Do not tamper with the power supply cable plug. If the power supply cable plug cannot be connected to the–
outlet, have new grounded outlet installed by a qualied technician, according to the law in force.
Before connecting the power supply cable to the electrical mains, check that frequency and voltage, shown –
on the machine serial number plate, match the electrical mains voltage.
Do not unplug the machine by pulling the supply cable. To unplug, grasp the plug, not the cable.–
Do not handle the plug or the machine with wet hands.–
Turn off all controls before unplugging.–
Regularly check the power supply cable for damages, cuts, cracks and wear. If necessary, replace it.–
If the power supply cable is damaged, contact the Nilsk Service Center for replacement.–
Do not pull or carry the machine by the power supply cable and never use the power supply cable as a–
handle. Do not close a door on the power supply cable, or pull the power supply cable around sharp edges
or corners. Do not run the machine on the power supply cable.
The brushes must not come into contact with the power supply cable.–
Keep the power supply cable away from heated surfaces.–
To reduce the risk of re, electric shock, or injury, do not leave the machine unattended when it is plugged –
in. Disconnect the machine from the electrical mains when not in use and before performing maintenance
procedures.
If the machine:–
• does not work properly
• is damaged
• has water or foam leaks
• has been left outdoors exposed to bad weather conditions
• is wet or has been dropped into water
turn it off immediately and contact the Nilsk Service Center or a qualied technician.

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
8909 6756 000(5)2010-03 BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551
TECHNICAL DATA (For BA 451 - BA 451D - BA 531 - BA 531D)
Model
BA 451
(1 brush/pad-
holder, without
drive system)
BA 451D
(1 brush/pad-
holder, with drive
system)
BA 531
(1 brush/pad-
holder, without
drive system)
BA 531D
(1 brush/pad-
holder, with drive
system)
Machine height 41.6 in (1,058.5 mm)
Solution/clean water tank capacity 10.5 gal (40 litres)
Recovery water tank capacity 10.5 gal (40 litres)
Min/max solution ow without EcoFlex™ system 0 ÷ 0,42 gal/min (0 ÷ 1,6 lt/min)
Min/max solution ow with EcoFlex™ system -0 ÷ 0,4 gal/min
(0 ÷ 1.5 lt/min) -0 ÷ 0,4 gal/min (0 ÷ 1.5 lt/min)
EcoFlex™ system tank capacity - 1,3 gal (5 litri) - 1,3 gal (5 litri)
EcoFlex™ system setting - 0,25% ÷ 3% - 0,25% ÷ 3%
Solution/clean water autonomy 0.29 gal/min (1,1 lt/min) ~ 36 min Media/Average
Front wheel diameter 7.8 in (200 mm)
Front wheel specic pressure on the ground (*) 174 psi (1,2 N/mm2)
Rear wheel diameter 3.9 in (100 mm)
Rear wheel specic pressure on the ground (*) 435 psi (3 N/mm2)
Minimum turning radius 23,6 in (600 mm) 25,6 in (650 mm)
Vacuum system motor power 0,44 hp (330 W)
Drive system motor power - 0,27 hp (200 W) - 0,27 hp (200 W)
Drive speed (variable) - da 0 a 2,8 MPH
(da 0 a 6 km/h) -da 0 a 2,8 MPH (da 0 a 6 km/h)
Working gradeability 2% - 1°
Sound pressure level (at the operator’s position)
(ISO 11201, ISO 4871) (LpA) 66 dB(A) ± 3dB(A)
Sound pressure level (to the machine)
(ISO 3744, ISO 4871) (LwA) 84 dB(A)
Vibration level at the operator’s arms (ISO 5349-1) < 98,4 in/s2(< 2.5 m/s2)
Standard batteries DRY: (2 x 12 V) 24 V 110 Ah / 5 h
Standard batteries autonomy ~ 3,2h ~ 2,6h ~ 3,2h ~ 2,6h
Battery compartment size (width x length x height) 13,8 x 13,8 x 11,8 in (350 x 350 x 300 mm)
Total consumption in work condition 29 A
Vacuum system circuit capacity 1,034 Mpa (1055 mm H2O)
Cleaning width 18,0 in (450 mm) 21,0 in (530 mm)
Squeegee width 30,0 in (760 mm)
Machine maximum length 46,8 in (1190 mm) 48,3 in (1228 mm)
Machine width without squeegee 20,1 in (512 mm) 21,2 in (540,8 mm)
Brush diameter 18,0 in (450 mm) 21,0 in (530 mm)
Deck right/left offset 1,5/- in (37,1/- mm) 3/- in (75,9/- mm)
Brush distance from the ground (when lifted) 2,4 in (60,1 mm)
Weight without batteries and with empty tanks 194,0 lb (88 kg)
Maximum weight with batteries and full tanks 479,6 lb (218 kg)
Brush motor power 0,65 hp (480 W)
Brush speed 153 rpm
Brush/pad-holder pressure with extra-pressure function turned off 42,0 lb (19,0 kg) 45,1 lb (20,5 kg)
Brush/pad-holder pressure with extra-pressure function turned on 57,9 lb (26,3 kg) 61,6 lb (27,8 kg)
(*) Machine test have been performed under the following conditions:
Battery maximum size•
Brush and squeegee maximum size•
Full clean water tank•
Optional equipment installed•
Wheel weight checked•
Each wheel print checked on cement•
Result expressed as maximum value for both front and rear wheels•

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551 909 6756 000(5)2010-03 9
TECHNICAL DATA (Per BA 551, BA 551D, BA 551CD, BA 611D)
General technical data
Model
BA 551
(1 brush/pad-
holder, without
drive system)
BA 551D
(1 brush/pad-
holder, with drive
system)
BA 551CD
(2 cylindrical
brushes, with
drive system)
BA 611D
(2 brushes/pad-
holders, with drive
system)
Machine height 42,8 in (1.088 mm)
Solution/clean water tank capacity 15,3 gal (58 litri)
Recovery water tank capacity 16,0 gal (60 litri)
Min/max solution ow without EcoFlex™ system 0 ÷ 0,42 gal/min (0 ÷ 1,6 lt/min)
Min/max solution ow with EcoFlex™ system - 0 ÷ 0,4 gal/min (0 ÷ 1.5 lt/min)
EcoFlex™ system tank capacity - 1,3 gal (5 litri)
EcoFlex™ system setting - 0,25% ÷ 3%
Solution/clean water autonomy 0.29 gal/min (1,1 lt/min) ~ 52 min Media/Average
Front wheel diameter 9,8 in (250 mm)
Front wheel specic pressure on the ground 174 psi (1,2 N/mm2)
Rear wheel diameter 3,9 in (100 mm)
Rear wheel specic pressure on the ground (*) 667 psi (4,6 N/mm2)
Minimum turning radius 27.5 in (700 mm)
Vacuum system motor power 0,44 hp (330 W)
Drive system motor power - 0,27 hp (200 W)
Drive speed (variable) - da 0 a 3,5 MPH (da 0 a 5,6 km/h)
Working gradeability 2% - 1°
Sound pressure level (at the operator’s position)
(ISO 11201, ISO 4871) (LpA) 66 dB(A) ± 3dB(A)
Sound pressure level (to the machine)
(ISO 3744, ISO 4871) (LwA) 84 dB(A)
Vibration level at the operator’s arms (ISO 5349-1) < 98,4 in/s2(< 2.5 m/s2)
Standard batteries GEL: (2 x 12 V) 24 V 110 Ah / 5 h
Standard batteries autonomy ~ 3,2h ~ 2,6h
Battery compartment size (width x length x height) 13,8 x 13,8 x 11,8 in (350 x 350 x 300 mm)
Total consumption in work condition 29 A
Vacuum system circuit capacity 1,034 Mpa (1.055 mm H2O)
(*) Machine test have been performed under the following conditions:
Battery maximum size•
Brush and squeegee maximum size•
Full clean water tank•
Optional equipment installed•
Wheel weight checked•
Each wheel print checked on cement•
Result expressed as maximum value for both front and rear wheels•

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
10 909 6756 000(5)2010-03 BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551
TECHNICAL DATA (Per BA 551, BA 551D, BA 551CD, BA 611D) (continues)
Technical data for machines with brush/pad-holder deck
Model
BA 551
(1 brush/pad-holder,
without drive system)
BA 551D
(1 brush/pad-holder, with
drive system)
BA 611D
(2 brushes/pad-holders,
with drive system)
Cleaning width 21,0 in (530 mm) 21,0 in 530 mm () 24,0 in (610 mm)
Squeegee width 30,0 in (760 mm) 32,0 in (810 mm)
Machine maximum length 52,1 in (1.323 mm) 51,6 in (1.311 mm)
Machine width without squeegee 21,3 in (541 mm) 25,4 in (646 mm)
Brush diameter 21,0 in (530 mm) 12,0 in (305 mm)
Deck right/left offset 3/- in (77/- mm) 3,4/3,1 in (87/80 mm)
Brush distance from the ground (when lifted) 2,3 in (59,5 mm) 2,7 in (69,5 mm)
Weight without batteries and with empty tanks 194,0 lb (88 kg) 225,0 lb 102 kg ()
Maximum weight with batteries and full tanks 520,3 lb (236 kg) 551,1 lb 250 kg ()
Brush motor power 0,64 hp (480 W) 0,47 hp (350 W)
Brush speed 153 rpm 230 rpm
Brush/pad-holder pressure with extra-pressure function turned off 45,2 lb (20,5 kg)
Brush/pad-holder pressure with extra-pressure function turned on 61,3 lb (27,8 kg)
Technical data for machines with cylindrical brush deck
Model BA 551CD
(2 cylindrical brushes, with drive system)
Cleaning width 20,0 in (510 mm)
Squeegee width 30,0 in (760 mm)
Machine maximum length 49,3 in (1253 mm)
Machine width without squeegee 22,7 in (575,5 mm)
Cylindrical brush size (diameter x length) 4,3 x 20,0 in (110 x 485 mm)
Deck right/left offset 3,7/0,2 in (94/4,5 mm)
Brush distance from the ground (when lifted) 1,5 in (39,5 mm)
Weight without batteries and with empty tanks 247,0 lb (112 kg)
Maximum weight with batteries and full tanks 573,2 lb (260 kg)
Brush motor power 0,54 hp (400 W)
Cylindrical brush rotation speed 570 rpm
Cylindrical brush pressure 58,4 lb (26,5 kg)

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551 909 6756 000(5)2010-03 11
TECHNICAL DATA (Per CA 451, CA 531, CA 551)
Model
CA 451
(1 brush/pad-holder,
without drive system)
CA 531
(1 brush/pad-holder,
without drive system)
CA 551
(1 brush/pad-holder,
without drive system)
Power supply 230 V, 50-60 Hz
Machine height 41.6 in (1,058.5 mm) 42,8 in (1.088 mm)
Solution tank capacity 10.5 gal (40 litres) 15,3 gal (58 litri)
Recovery water tank capacity 10.5 gal (40 litres) 16,0 gal (60 litri)
Min/max solution ow 0 ÷ 0,42 gal/min (0 ÷ 1,6 lt/min)
Solution/clean water autonomy (0.29 gal/min - Media/Average) ~ 36 min ~ 52 min
Front wheel diameter 7,8 in (200 mm) 9,8 in (250 mm)
Front wheel specic pressure on the ground (*) 87 psi (0,6 N/mm2) 145 psi (1,0 N/mm2)
Rear wheel diameter 3,9 in (100 mm)
Rear wheel specic pressure on the ground (*) 464 psi (3,2 N/mm2) 623 psi (4,3 N/mm2)
Minimum turning radius 23,6 in (600 mm) 25,6 in (650 mm) 700 mm
Vacuum system motor power 0,74 hp (550 W), 50-60 Hz
Working gradeability 2% - 1°
Sound pressure level (at the operator’s position)
(ISO 11201, ISO 4871) (LpA) 68 dB(A) ± 3dB(A)
Sound pressure level (to the machine)
(ISO 3744, ISO 4871) (LwA) 84 dB(A)
Vibration level at the operator’s arms (ISO 5349-1) < 98,4 in/s2(< 2.5 m/s2)
Total consumption in work condition 6 A (50Hz) - 7 A (60Hz)
Vacuum system circuit capacity 1,29 Mpa (1.316 mm H2O)
Cleaning width 18,0 in (450 mm) 21,0 in (530 mm)
Squeegee width 30,0 in (760 mm)
Machine maximum length 45,1 in (1.147 mm) 46,6 in (1.185 mm) 51,4 in (1.306 mm)
Machine width without squeegee 20,1 in (512 mm) 21,3 in (541 mm)
Brush diameter 18,0 in (450 mm) 21,0 in (530 mm)
Deck right/left offset 1,5/- in (37,1/- mm) 3/- in (77/- mm)
Brush distance from the ground (when lifted) 2,3 in (59,5 mm)
Weight with empty tanks 288,8 lb (131 kg)
Weight with full tanks 376,2 lb (171 kg) 416,7 lb (189 kg)
Brush motor power 1,48 hp (1.100 W), 50-60 Hz
Brush speed 150 rpm
Brush pressure 62,2 lb (28,3 kg) 65,2 lb (29,6 kg) 66,1 lb (30 kg)
(*) Machine test have been performed under the following conditions:
Battery maximum size•
Brush and squeegee maximum size•
Full clean water tank•
Optional equipment installed•
Wheel weight checked•
Each wheel print checked on cement•
Result expressed as maximum value for both front and rear wheels•

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
12 909 6756 000(5)2010-03 BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551
DIMENSIONS BA 451
1190 mm (46.8 in) 760 mm (30.0 in)
1058.5 mm (41.6 in)
512 mm (20.1in)
DIMENSIONS BA 451D
1190 mm (46.8 in) 760 mm (30.0 in)
1058.5 mm (41.6 in)
512 mm (20.1in)

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551 909 6756 000(5)2010-03 13
DIMENSIONS BA 531
1228 mm (48.3 in) 760 mm (30.0 in)
1058.5 mm (41.6 in)
540 mm (21.2 in)
DIMENSIONS BA 531D
1228 mm (48.3 in) 760 mm (30.0 in)
1058.5 mm (41.6 in)
540.8 mm (21.2 in)

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
14 909 6756 000(5)2010-03 BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551
DIMENSIONS CA 451
1147 mm (45.1 in) 760 mm (30.0 in)
1058.5 mm (41.6 in)
512 mm (20.1in)
P100200
DIMENSIONS CA 531
1185 mm (46.6 in) 760 mm (30.0 in)
1058.5 mm (41.6 in)
541 mm (21.3 in)
P100201

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551 909 6756 000(5)2010-03 15
DIMENSIONS BA 551
1323 mm (52.1 in) 760 mm (30.0 in)
1088 mm (42.8 in)
541 mm (21.3 in)
P100202
DIMENSIONS BA 551D
1323 mm (52.1 in) 760 mm (30.0 in)
1088 mm (42.8 in)
541 mm (21.3 in)
P100202

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
16 909 6756 000(5)2010-03 BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551
DIMENSIONS BA 551CD
1253 mm (49.3 in) 760 mm (30.0 in)
1088 mm (42.8 in)
575.5 mm (22.7 in)
P100203
DIMENSIONS BA 611D
1311 mm (51.6 in) 810 mm (32 in)
1088 mm (42.8 in)
646 mm (25.4 in)
P100204

GENERAL INFORMATION
SERVICE MANUAL ENGLISH
BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551 909 6756 000(5)2010-03 17
DIMENSIONS CA 551
1306 mm (51.4 in) 760 mm (30.0 in)
1088 mm (42.8 in)
541 mm (21.3 in)
P100205

GENERAL INFORMATION
ENGLISH SERVICE MANUAL
18 909 6756 000(5)2010-03 BA 451 / BA 451D / BA 531 / BA 531D / BA 551 / BA 551D / BA 551CD / BA 611D
CA 451 / CA 531 / CA 551
MAINTENANCE
The lifespan of the machine and its maximum operating safety are ensured by correct and regular maintenance.
WARNING!
Read carefully the instructions in the Safety chapter before performing any maintenance procedure.
The following tables provides the scheduled maintenance. The intervals shown may vary according to particular working conditions,
which are to be dened by the person in charge of the maintenance.
For instructions on maintenance procedures, see the following paragraphs.
SCHEDULED MAINTENANCE TABLE (For BA 451, BA 451D, BA 531, BA 531D, BA 551, BA 551D, BA
551CD, BA 611D)
Procedure Daily, after
machine use Weekly Every six months Yearly
Battery charging
Squeegee cleaning
Brush/pad cleaning
Tank and vacuum grid with oat cleaning, and cover gasket check
Squeegee blade check and replacement
EcoFlex™ system cleaning and draining (optional)
Solution/clean water lter cleaning
Battery (WET) uid level check
Vacuum system motor lter cleaning
Screw and nut tightening check (1)
Brush/pad-holder motor carbon brush check or replacement
Vacuum system motor carbon brush check or replacement
Drive system motor carbon brush check or replacement (For
BA 451D - BA 531D – BA 551D – BA 551CD - BA 611D)
(1): And after the rst 8 working hours.
SCHEDULED MAINTENANCE TABLE (For CA 451, CA 531, CA 551)
Procedure Daily, after
machine use Weekly Every six months Yearly
Power supply cable check
Squeegee cleaning
Brush/pad cleaning
Tank and vacuum grid with oat cleaning, and cover gasket check
Squeegee blade check and replacement
Solution lter cleaning
Vacuum system motor lter cleaning
Screw and nut tightening check (1)
Brush/pad-holder motor carbon brush check or replacement
Vacuum system motor carbon brush check or replacement
(1): And after the rst 8 working hours.