BEST SCRUBBERS 20DISK User manual

Read the Operators Manual
before using the machine.
Read the Safety Messages
before servicing machine.
www.bestaviationproducts.com
252 W 3560 N,
Spanish Fork, Utah (USA)
801-855-7757
©2020 Best Aviation Products
V21.237
BS-20DISK-28DISK-OP-EN
Read the Operators Manual
before using the machine.
Read the Safety Messages
before servicing machine.
www.bestaviationproducts.com
252 W 3560 N,
Spanish Fork, Utah (USA)
801-855-7757
©
2020 Best Aviation Products
V21.237
BS-20DISK-28DISK-OP-EN
Operator Manual (EN)
Models:
20 '', & 28'' Disk

BEST SCRUBBER 20 / 28 DISK 2
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SERIAL NUMBER
This manual will allow the Operator to get the best performance out of your Scrubber-Drier. Read this manual thoroughly
before operating or servicing the machine.
This machine will provide excellent performance, but the best results will be obtained at the most minimum costs if:
• The machine is regularly maintained.
• The machine is operated with reasonable care and caution.
• The machine is maintained with manufacturer supplied parts.
Locate Serial Number
The serial number of your machine is located on the lower half of the control panel of the machine.
AS OUR POLICY IS ONE OF CONSTANT IMPROVEMENT - ALL INFORMATION AND
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Intended use
The Best Scrubber 20/28Disk walk-behind scrubber is intended for commercial applications with hard floor surfaces such
as concrete, VCT, tile and grout, stone, ect. This machine is not designed to clean carpets or sand wooden surfaces. Use
only OEM pads/brushes and commercially available floor cleaning detergents. Do not use this machine other than de-
scribed in this Operator Manual.
INTRODUCTION
Fill out while installing machine for future reference.
Model No. - ______________________________
Serial No. - ______________________________
Installation Date - _________________________
Machine Data Uncrating Machine
Inspect machine for damage before unloading, if any damage
has occurred report it to the carrier.
Contact Best Aviation Products for missing components.
Remove protective shipping frame then locate and unscrew
the metal bracket connecting the machine to the pallet. Before
removal the scrub head should be in the raised position. Using
the supplied ramp carefully back the machine off the pallet.
SERIAL NUMBER

BEST SCRUBBER 20 / 28 DISK 3
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CONTENTS
INTRODUCTION
Locate Serial Number . . . . . . . 2
Intended use . . . . . . . . . . . 2
Machine Data . . . . . . . . . . . 2
Uncrating Machine . . . . . . . . 2
SAFETY
Important Safety Messages . . . . 4
Safety Labels . . . . . . . . . . . 5
OPERATION
Machine Overview . . . . . . . . . 6
Central Command Overview . . . . 7
Squeegee Installation . . . . . . . 8
Squeegee Adjustment . . . . . . . 9
Battery Setup . . . . . . . . . . . 10
Battery Charger Use . . . . . . . . 11
Forward Drive . . . . . . . . . . . 12
Reverse Drive . . . . . . . . . . . 13
Fill Solution Tank . . . . . . . . . 14
Scrubbing . . . . . . . . . . . . . 15
Drying . . . . . . . . . . . . . . 16
Drain Recovery Tank . . . . . . . 17
Flushing Recovery Tank . . . . . . 18
Vac Wand . . . . . . . . . . . . . 19
Charging . . . . . . . . . . . . . 20
WEEKLY MAINTENANCE (<25 HRS)
Clean White Filter/Screen . . . . . 21
Rotate Disk Brushes . . . . . . . . 22
Clean Solution Filter . . . . . . . . 23
Squeegee Blade Replacement . . . 24
Drain Solution Tank . . . . . . . . 25
MONTHLY MAINTENANCE (<100 HRS)
Deck Shroud Curtain Replacement . 26
Squeegee Blade Kits . . . . . . . 28
Battery Charger . . . . . . . . . . 29
Status Light Guide . . . . . . . . . 30
Schematics . . . . . . . . . . . . 31

BEST SCRUBBER 20 / 28 DISK 4
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SAFETY
Important Safety Messages
You will see four kinds of safety reminders in this manual:
DANGER
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
CAUTION
CAUTION indicates a potentially hazardous situation
which, if not avoided, could result in minor or moderate
injury or damage to this machine or nearby objects. CAU-
TION also can be used to alert against unsafe practices.
NOTICE
NOTICE indicates information considered important, but
not hazard-related. This safety message may be related to
property damage or warranty warnings.
Your safety, and that of others, is very important. Operating this machine safely is an important responsibility.
DO NOT OPERATE THIS MACHINE:
• Unless you are trained and authorized to do so
• Unless you have read and understood this Operator’s Manual
• On surfaces with greater than a 3° slope.
• Within 25’ (8m) of Loading Docks
WHEN OPERATING THIS MACHINE:
• Remove loose objects from the floor that could be projected from the rotating Brushes
• Keep your hands and feet away from the rotating Brushes
• Do not operate this machine where flammable liquids, vapors, or dust are present
• Use caution when maneuvering
BEFORE LEAVING THE MACHINE:
• Drain “clean” Solution & “dirty” Recovery solution into APPROVED drains
• Park the machine on a level surface
• Turn the machine off & remove key
BEFORE SERVICING THE MACHINE:
• Disconnect the Batteries
DANGER
Explosive hydrogen gas forms when Batteries are
charging. An open flame or spark can cause this gas
to explode. Serious personal injury or property damage
could occur. Only charge the Batteries in this machine in
a well ventilated area.
DANGER
Flammable materials can cause an explosion or fire. Do
not use flammable materials in Tank or pick up.

BEST SCRUBBER 20 / 28 DISK 5
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SAFETY
WARNING
The Batteries in this machine produce hazardous
voltage which can cause electrical shock, burns and/
or electrocution. Always disconnect Batteries before
servicing this machine.
WARNING
When climbing or descending ramps, always drive
machine forward. To avoid overturning the machine,
Do not back down ramps. Do not drive across inclines.
Do not turn while ascending or descending ramps.
Overturning the machine can cause serious injury or
death.
WARNING
Do not use water that exceeds 135°F / 57°C. If water
is above said temperature, this will void the Tank
Warranty.
WARNING
Do not park this machine on ramps or slopes. Always
park this machine on a level, hard surface. Do not
operate this machine outdoors or on uneven surfaces.
WARNING
The Batteries in this machine contain sulfuric acid,
which causes burns to skin. If battery acid contacts
clothing or skin, rinse the effected area with cold water
immediately. If battery acid gets on your face or in your
eyes, flush the area immediately with cold water and
seek medical attention.
WARNING
To avoid electrical shock, do not operate this machine
over electrical floor outlets.
WARNING
Dress safely. Do not wear rings or metal wrist watches
when servicing this machine, as they can cause an
electrical short circuit which can cause serious burns.
WARNING
Do not remove, paint over or destroy warning decals. If
warning decals become damaged, call 1-262-681-3583
for free replacements.
WARNING
Dress safely. Do not wear a neck tie, scarf, or any
loose or dangling clothing while operating this machine.
Loose or dangling clothing or neck-wear can tangle in
rotating parts, causing serious injury or death.
WARNING
Always turn off this machine before leaving it
unattended. Do not allow untrained persons to operate
this machine.
WARNING
NO RIDERS. Do not carry passengers on this machine.
Do not use this machine as a stepladder or work
platform.
WARNING
Understand the dynamic braking system before you
operate the machine on ramps. Machine may coast.
WARNING
Before you service a Battery, always wear face
protection, protective gloves and protective clothing.
Battery acid or battery explosion can cause serious
injuries.
CAUTION
To avoid damage to this machine, use only cleaning
solutions and replacement parts recommended by the
manufacturer.
CAUTION
Do not operate this machine if any parts have been
damaged or removed.
CAUTION
Always use the automatic battery charger provided
by the manufacturer of this machine to charge the
Batteries of this machine. It is designed to charge
the Batteries at the appropriate rate. If you must use
a different charger, disconnect the Batteries before
charging to avoid damage to the electronic speed
controller.
CAUTION
To avoid damage to the electronic control components
of this machine, Do not store this machine outdoors. Do
not pressure wash this machine.

BEST SCRUBBER 20 / 28 DISK 6
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OPERATION
Machine Overview
1. Recovery Tank
2. Vac Motor
3. 2x 12VDC Batteries
4. Solution Tank
5. Squeegee
6. Rear Caster Wheel
7. Tire
8. Scrub Deck
9. Recovery Tank Clean Out
10. Foam Float Ball & White Filter
11. Solution Fill
12. Tank Latch
13. Charging Port
14. Solution Flow Lever +/-
15. Solution Sight Tube & Drain Hose
16. Squeegee Lever
17. Recovery Drain Hose
1
2
3
4
5
67
8
910
11
12
13
14
17
15
16
BEST SCRUBBER 20 / 28 DISK
6
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OPERATION
Machine Overview
1.
Recovery Tank
2.
Vac Motor
3.
2x 12VDC Batteries
4.
Solution Tank
5.
Squeegee
6.
Rear Caster Wheel
7.
Tire
8.
Scrub Deck
9.
Recovery Tank Clean Out
10.
Foam Float Ball & White Filter
11.
Solution Fill
12.
Tank Latch
13.
Charging Port
14.
Solution Flow Lever +/-
15.
Solution Sight Tube & Drain Hose
16.
Squeegee Lever
17.
Recovery Drain Hose
1
2
3
4
5
6
7
8
9
10
11
12
13
14
17
15
16

BEST SCRUBBER 20 / 28 DISK 7
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OPERATION
Central Command Overview
1. Drive Switch
2. Key Switch
3. Right Brush Circuit Breaker
4. Left Brush Circuit Breaker
5. Positive BUSS Circuit Breaker
6. Valve Circuit Breaker
7. Negative BUSS Circuit Breaker
8. Vac Circuit Breaker
9. Dual USB 12V
10. Speed Control Knob
11. Battery Gauge/Hour Meter
12. System Status Indicator Light
13. Brush Pressure Gauge
14. Vac Switch I/O
15. Solution Switch I/O
16. Deck Switch Up (I) / Down (O)
17. Drive Switch
18. Reverse Switch
1
2
3
5
4
6
8
9
7
10
11
14 15 16
12 13 17
18
BEST SCRUBBER 20 / 28 DISK
7
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OPERATION
Central Command Overview
1.
Drive Switch
2.
Key Switch
3.
Right Brush Circuit Breaker
4.
Left Brush Circuit Breaker
5.
Positive BUSS Circuit Breaker
6.
Valve Circuit Breaker
7.
Negative BUSS Circuit Breaker
8.
Vac Circuit Breaker
9.
Dual USB 12V
10.
Speed Control Knob
11.
Battery Gauge/Hour Meter
12.
System Status Indicator Light
13.
Brush Pressure Gauge
14.
Vac Switch I/O
15.
Solution Switch I/O
16.
Deck Switch Up (I) / Down (O)
17.
Drive Switch
18.
Reverse Switch
1
2
3
5
4
6
8
9
7
10
11
14
15
16
12
13
17
18

BEST SCRUBBER 20 / 28 DISK 8
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OPERATION
Squeegee Installation
3 3
4 4
5
1
2
OPERATION
Squeegee Installation
3
3
4
4
5
1
2

BEST SCRUBBER 20 / 28 DISK 9
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OPERATION
Squeegee Adjustment
1
2
(RH) (LH)
OPERATION
Squeegee Adjustment
1
2
(RH)
(LH)

BEST SCRUBBER 20 / 28 DISK 10
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OPERATION
Battery Setup
Approved Drains Only
Single 20'' Disk =(x2) 95 Amp Hr. Batteries
All Other Decks =(x2) 150 Amp Hr. Batteries
Machine On Level Ground
5
4 4
3
6
9
7
8
1
2
Battery 1Battery 2
A
B
C
D
E
F
A
B
C
D
E
F
12VDC 12VDC
BEST SCRUBBER 20 / 28 DISK
10
Battery Setup
Approved Drains OnlyApproved Drains Only
Single 20'' Disk =(x2) 95 Amp Hr. Batter
Single 20'' Disk =(x2) 95 Amp Hr. Batter
Single 20'' Disk =(x2) 95 Amp Hr. Batter
ies
ies
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
All Other Decks =(x2) 150 Amp Hr. Batter
ies
ies
Machine On Level Ground
Machine On Level Ground
5
4
4
3
6
9
7
8
1
2
Battery 1
Battery 2
A
B
C
D
E
F
A
B
C
D
E
F
12VDC
12VDC

BEST SCRUBBER 20 / 28 DISK 11
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OPERATION
Forward Drive
1
2
3
4
+/-3° MAX
BEST SCRUBBER 20 / 28 DISK
11
Forward Drive
1
2
3
4
+
/
-
3
° MAX

BEST SCRUBBER 20 / 28 DISK 12
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OPERATION
Reverse Drive
1
2
3
4
+/-3° MAX
OPERATION
Reverse Drive
1
2
3
4
+
/
-
3
° MAX

BEST SCRUBBER 20 / 28 DISK 13
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OPERATION
Fill Solution Tank
3
5
6
4
4/4
4/4
3/4
3/4
2/4
2/4
1/4
1/4
1
2
BEST SCRUBBER 20 / 28 DISK
13
Fill Solution Tank
3
5
6
4
4/4
4/4
4/4
4/4
3/4
3/4
2/4
2/4
1/4
1/4
1
2

BEST SCRUBBER 20 / 28 DISK 14
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OPERATION
Scrubbing
1
6
7
8
2
34
5
9
BEST SCRUBBER 20 / 28 DISK
14
Questions? Call 801-855-7757 Use OEM Parts
1
6
7
8
2
3
4
5
9

BEST SCRUBBER 20 / 28 DISK 15
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OPERATION
Drying
1
3
4
5
2
6
BEST SCRUBBER 20 / 28 DISK
15
Questions? Call 801-855-7757 Use OEM Parts
1
3
4
5
2
6

BEST SCRUBBER 20 / 28 DISK 16
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OPERATION
Drain Recovery Tank
Approved Drains Only
63
4 5
1
2
BEST SCRUBBER 20 / 28 DISK
16
Drain Recovery Tank
Approved Drains OnlyApproved Drains Only
6
3
4
5
1
2

BEST SCRUBBER 20 / 28 DISK 17
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OPERATION
Flushing Recovery Tank
Approved Drains Only
Approved Drains Only
4
5
6
3
1
2
BEST SCRUBBER 20 / 28 DISK
17
Flushing Recovery Tank
Approved Drains OnlyApproved Drains Only
Approved Drains OnlyApproved Drains Only
4
5
6
3
1
2

BEST SCRUBBER 20 / 28 DISK 18
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Vac Wand
13
2
5
6
4
BEST SCRUBBER 20 / 28 DISK
18
Vac Wand
1
3
2
5
6
4
OPERATION

BEST SCRUBBER 20 / 28 DISK 19
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Charging
1
2
BEST SCRUBBER 20 / 28 DISK
19
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Charging
1
2
OPERATION

BEST SCRUBBER 20 / 28 DISK 20
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WEEKLY MAINTENANCE (<25 HRS)
Clean White Filter/Screen
11
6
4
5
3
7
10
9
8
1
2
WEEKLY MAINTENANCE (<25 HRS)
Clean White Filter/Screen
11
6
4
5
3
7
10
9
8
1
2