Nilfisk-Advance Clarke Focus II Large User manual

6/12 revised 11/13 FORM NO. 56043162
Clarke Focus II Large
Service Manual
Clarke Models: 56381796 (Focus II D-C AUS), 56381825 (Focus II D), 56381828
(Focus II D-C)

ii - 56043162 - Focus II Large
Table of Contents
Table of Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Other Manuals Available For Your Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PM Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Know Your Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Main Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
 . . . . . . . . . . . . . 23
 . . . . . . . . . . . . . . . . . . . . . . . 23
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Circuit Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

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Table of Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
 . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

iv - 56043162 - Focus II Large
Table of Contents
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
 . . . . . . . . . . . . . . . . . . . . . . . . . . 74
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

5- FORM NO. 56043162 - Focus II Large
Introduction
Introduction
This manual will help you get the most from your Clarke Focus II Large Autoscrubber. Read it thoroughly
before servicing the machine.
Note: Bold numbers and letters in parentheses indicate illustrated items.
Note: All references to right, left, front, or rear in this manual are as seen from the operator’s standpoint.
Nameplate
The Model Number and Serial Number of your machine are shown on the Nameplate on the machine. This
information is needed when ordering repair parts for the machine. Use the space below to note the Model Number
and Serial Number of your machine for future reference.
MODEL NUMBER ________________________________________
SERIAL NUMBER ________________________________________
Other Manuals Available For Your Machine
The following manuals are available at Clarke Literature Service Department:
 Instructions for Use (English/Español/Francais) – Form Number 56091028
 Parts List – Form Number 56042584
Conventions
Forward, backward, front, rear, left or right are intended with reference to the operator’s position, that is to say in
operating position with the hands on the handlebar.
Transporting the Machine
Caution! Before transporting the machine on an open truck or trailer, make sure that
• The machine is tied down securely.
• All access doors and covers are secured (tape and strap as needed).
Caution! If the machine must be towed or pushed, make sure the Master On/Off Key Switch
(A) is in the OFF position and do not move the machine faster than a normal walking
pace (2-3 mph, 3-5kph) and for short distances only. Note: Disconnecting the wheel
drive motor wiring connector will make a disabled machine easier to push.

6- FORM NO. 56043162 - Focus II Large
Introduction
Cautions and Warnings
Symbols
It is important for you to read and understand this manual. The information it contains relates to protecting your
safety and preventing problems. The symbols below are used to help you recognize this information.
Danger! Indicates a potentially hazardous situation which, if not avoided, will result in
death or serious injury.
Warning! Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
Caution! Indicates a potentially hazardous situation which, if not avoided, could result in
minor or moderate injury.
Caution! When used without the Safety Alert Symbol, indicates a potential situation which,
if not avoided, could result in property or machine damage.

7- FORM NO. 56043162 - Focus II Large
Introduction
General Safety Instructions
Warning!
This machine should be used only by properly trained and authorized persons.
Never work under a machine without safety blocks or stands to support the machine.
 
during normal operation.
 

Remove all jewelry when working near electrical components.
 

Caution!:
When operating this machine, ensure that third parties, particularly children, are not
endangered.
Turn the key switch off (O) and disconnect the batteries before servicing electrical components.
Turn the key switch off (O) and remove the key, before changing the brushes, and before
opening any access panels.
This machine is not suitable for picking up hazardous dust.
 
While on ramps or inclines, avoid sudden stops when loaded. Avoid abrupt sharp turns. Use low
speed down hills. Clean only while ascending (driving up) the ramp.
Before performing any service function, carefully read all instructions pertaining to that
function.
 (O), removing the
key and securing the machine.
Take precautions to prevent hair, jewelry, or loose clothing from becoming caught in moving
parts.
 
The use of other brushes may impair safety.
 
warnings.
Caution!:
This machine is not approved for use on public paths or roads.
 

Turn the key switch off (O) and remove the key, before changing the brushes, and before
opening any access panels.
Use caution when moving this machine in below freezing temperature conditions. Any water
in the solution, recovery or detergent tanks or in the hose lines could freeze, causing damage to

The batteries must be removed from the machine before the machine is scrapped. The disposal
of the batteries should be safely done in accordance with your local environmental regulations.
Do not clean this machine with a pressure washer.
All doors and covers are to be positioned as indicated in the instruction manual before using the
machine.

8- FORM NO. 56043162 - Focus II Large
Introduction
Technical Specifications
Voltage 36-Volt
Power Source (6) 6-volt Batteries (wet acid and gel cell available)
Battery Capacity 305 amp-hrs.
Protection Grade IPX3
Onboard Battery Charger 36-volt, 25-amp Wet/Gel Compatible
Solution Control Pulse-control gravity feed
Solution Tank 30 gal. (114 L)
Recovery Tank 30 gal. (114 L)
Scrub Motors (2) 0.75 HP (560-watt)
Vacuum Motor 0.75 HP (560-watt) three-stage
Sound Pressure Level (IEC 60704-1) 74.5 dB(A)/20µPa
Drive System 0.5 HP (375-watt) variable forward and reverse; max. speed = 3 mph (4.83 km/hr)
Drive Wheels 
Scrub Head Type Disc
Scrub Path 34 inches (86 cm)
Gradeability Transport 2% (1.15º)
Cleaning 2% (1.15º)
Max. Productivity @ 3.0 mph 44,880 ft2/hr (4,169 m2/hr)
Max. Productivity @ 1.5 mph 22,440 ft2/hr (2,085 m2/hr)
Scrub Head Size and Type (2) 17 in,(43 cm) Brushes or Pad Holders
Scrub
Pressure
(1) Regular Scrub Max. 90 lbs (40.8 kg)
(2) Heavy Scrub Max. 175 lbs (79.4 kg)
(3) Extreme Scrub Max. 250 lbs (113.4 kg)
Scrub Head Speed 220 RPM
Solution
Flow Rate
(1) Regular Scrub 0.30 gal/min (1.1 L/min) or 100 minutes per solution tank
(2) Heavy Scrub 0.60 gal/min (2.3 L/min) or 50 minutes per solution tank
(3) Extreme Scrub 0.90 gal/min (3.4 L/min) or 33 minutes per solution tank
Squeegee Width 41.9 in (106 cm)
Dimensions (w/o Squeegee) W = 35.5 in (90 cm); L = 62.5 in (159 cm); H = 45 in (114 cm)
Gross Weight w/Standard Batteries 1,245 lbs (565 kg)
Battery Compartment Size See Illustration below; W = 25.5 in (65 cm), L = 29.5 in (75 cm), H = 15 in (38 cm)
14.5"
15"
25.5"
29.5"

9- FORM NO. 56043162 - Focus II Large
Introduction
Technical Specifications (continued)

10 - FORM NO. 56043162 - Focus II Large
Introduction
Maintenance Schedule
Maintenance intervals given are for average operating conditions. Machines used in severe operational

MAINTENANCE ITEM Daily Weekly Monthly Yearly
Charge the Batteries X
Check/Clean Tanks and Hoses (clean recovery tank switch and vacuum inlet screen) X
Check/Clean/Rotate the Brushes/Pads X
Check/Clean the Squeegee X
Check the Water Level in each Battery Cell (does not apply to gel cell batteries) X
Inspect the Brush Housings X
Inspect and Clean the Solution Filter X
Lubricate the Machine X
* Check the Carbon Brushes X
Note: See the individual machine system sections in this manual for maintenance information.
Warning! Turn the key switch off and disconnect the batteries before servicing the
machine.
* Carbon brush inspection intervals and replacement recommendations:
 Check the vacuum motor carbon brushes (two per motor) once a year or after 300 operating hours.
 Check the carbon brushes on the brush and wheel drive motors (four per motor) once a year or after 500 operating
hours.
 
drive motors.
 
brushes.
Important! Motor damage resulting from failure to service the carbon brushes is not
covered under warranty. See the Limited Warranty Statement.
Batteries and Chargers
Attention: See the Electrical System/Batteries
section in this manual for battery installation,
battery maintenance and charger system

Lubricating the Machine
Once a month, apply light machine oil to lubricate
the:
 
(A).
 
knob (B).
 (C).
 General pivot points for the brush linkage (D).

of the two caster swivels (E).

Advance 34 RST Models
PM Checklist
Defect Codes
Customer Aneeds adjustment
Bbinding
Address Cdirty or contaminated
Ddamaged, bent or torn
City St Zip Lleaks
Mmissing
Model Serial No. Hours Wworn out
Ref
OPERATIONAL INSPECTION ITEMS
OK
Defect Codes
(circle)
Does
Not
Work
1 Palm Drive Button and Reverse Button Operation (check for Fwd/Rev Drive) B D W
2 Drive System Performance (Speed Changes Min/Max) noisy sluggish
3 Scrub System (Raise/Lower, Brush Motor On/Off) A B D
4 Scrub Brush Pressure settings (1-3) A B
5 Squeegee System (Raise/Lower and Squeegee Tool pick-up Performance) A B D
6 Vacuum Performance (Sealed water lift and 1” open hole adapter, 36v-68/12) C L W
7 Solution Control (Auto On/Off and Flow Volume settings 1, 2 and 3 A B L
8 Battery Charger (Auto turn ON and OFF) D
9 Main Controller Special Program Options (see Electrical System/Main Control
Programming Options). Check all applicable machine settings. Examples: Scrub
mode pressure settings, service test mode, low voltage cut-out, etc.
A
Ref
VISUAL INSPECTION ITEMS
Comments OK
Defect Codes
(circle)
Does
Not
Work
10 Scrub Brushes, check for wear and rotate D M W
11 Scrub Brush Motor(S), check for carbon brush wear 500 Hours B C W
12 Scrub Brush Motor(S), check gearboxes B D L
13 Brush Drive Motor Gimbals C D M
14 Scrub Deck Lift Motor, Brush Housings and Side Wheel D M W
15 Solution Solenoid Valve C L W
16 Solution Tank, Delivery Hoses and Filter  C L
17 Vacuum Motor Carbon Brushes (wear limit 3/8” [9.5 mm]) 300 Hours B C W
18 Vacuum Motor Inlet Filter (located in recovery tank) clean screen C D M
19 Recovery Tank Cover Gasket L M W
20 Recovery Tank Drain Hose and Cap C D L
21 Squeegee Pick-up Hose  C D L
22 Squeegee Tool and Blades (clean, rotate and adjust) A D W
23 Squeegee Tool End Wheels and Squeegee Mount Wheels
(lubricate)
2 mount wheels
and 2 end wheels
A D W
24 Battery Condition (load test, clean and water) C W
25 Drive Wheel Transaxle Motor Check Carbon Brushes 500 Hours B C D W
26 Transaxle Drive Tires tread wear W
27 Rear chassis Caster Wheel (grease the zerks) tread wear W
Note: For additional service information, see the individual machine system sections and the Instructions for Use, form #56041706.
WORK COMPLETED BY: ACKNOWLEDGED BY:
Service Technician Signature Date Customer Signature Date

12 - FORM NO. 56043162 - Focus II Large
Introduction
Know Your Machine
(2).
These numbers refer to items shown on the following pages unless otherwise noted. Refer to these pages for the

1 Solution Tank Fill
2 Operator Control Handle
3 Bottle Holders
4 Vacuum Motor Inlet Screen
5 Recovery Tank Cover
6 Nose Cone
7 Scrub Deck
8 Brush Housings (includes Bristle Skirt)
9 Scrub Deck Bumper Wheel
10 Drive Wheel
11 Solution Filter
12 Solution Shutoff Valve
13 Squeegee Assembly
14 Battery Pack Connector (onboard charger models only)
15 Onboard Battery Charger (not found on all models)
16 Solution Drain Hose/Level Indicator

13 - FORM NO. 56043162 - Focus II Large
Introduction
16 Solution Drain Hose/Level Indicator
17 Squeegee Raise/Lower Lever
18 Battery Pack Connector (non onboard charger models only)
19 Recovery Hose
20 Wheel Drive Circuit Breaker
21 Circuit Breaker for the Control Circuit
22 Squeegee Blade Tension Strap
23 Squeegee Blade Latch
24 Squeegee Blade Alignment Pins
25 Squeegee Mount Thumb Nut
26 Squeegee Adjustment Knob
27 Recovery Tank Drain Hose
28 Reverse Button
29 Palm Drive Buttons
30 Speed Limit Control Knob
31 Control Panel
32 Vacuum Shutoff Switch

14 - FORM NO. 56043162 - Focus II Large
Introduction
A1 Control Panel Assy
A2 Speed Control
BT1 Battery (Not Shown)
F1 Fuse, 150 Amp
F2 Circuit Breaker, 5 Amp
F3 Circuit Breaker, 30 Amp
K1 Contactor, Brush Motor
K2 Contactor, Vac Motor
L1 Solenoid, Solution
M1 Motor, Wheel Drive
M2 Motor, Left Brush
M3 Motor, Right Brush
M4 Motor, Vac
M5 Motor, Brush Actuator
R1 Potentiometer, 100K Ohm, Speed Limit
S3 Switch, Key
S4 Switch, Float (Recovery Tank Full)
S5 Switch, Reverse
S6 Switch, Palm Assy
S7 Switch, Palm Assy
X9 Battery Disconnect
X10 Battery Disconnect

15 - FORM NO. 56043162 - Focus II Large
Control Panel
Control Panel
A Key Switch (Main Power)
B Solution Switch
B1 Solution Indicator
D1 Solution Flow Indicator
C Vacuum Switch
C1 Vacuum System Indicator
H Scrub OFF Switch
H1 Scrub OFF Indicator
I- Scrub ON Switch
I1 – Regular Scrub ON Indicator
I2 – Heavy Scrub ON Indicator
I1 and I2 – Extreme Scrub ON Indicators
J Display
J1 Battery Indicator
J2 Hour Meter / Scrub Pressure Indicator / Fault Code
Display / Recovery Tank FULL Indicator
A
B
C
H
I
J
J1 J2
1
2
3
D1
H1
I1 I2
I1
I2
I2
I1
C1
B1
Extreme
Scrub
Pressure
Heavy
Scrub
Pressure
Regular
Scrub
Pressure
High
Solution
Flow
Low
Solution
Flow
Medium
Solution
Flow

16 - FORM NO. 56043162 - Focus II Large
Control Panel
Functional Description
The control panel is an integral component with the Main controller (A1) circuit board. The controls on the 34 RST
were designed with one touch operation 

only need to use the middle switches on the control panel. These are the Scrub System OFF and Scrub System ON
switches.
Key Switch (A): The key switch serves as a main control switch to enable or disable operation of the machine.
The key is removable to prevent unwanted operation when not in use. The key switch doesn’t disconnect any power
circuits, but instead, sends a signal to both the Main controller and Curtis Drive controller to indicate the On/Off
function.
Solution Switch (B) 

on the Solution Flow Indicator (D1)Palm Drive Button (29) is pressed
Palm Drive
Buttons (29) are released. Pressing the Solution Switch (B) when the scrub system is off will momentarily turn

Solution Switch (B)
depressed.
Scrub OFF Switch (H) 
 The scrub brushes will turn off and the scrub deck will be raised to the up position.
 
 
remaining water may be picked up without having to turn the vacuum back on. If this switch is pressed a second

second delay.
Scrub ON Switch (I) – If the scrub system is off, pressing this switch once will cause the following to occur:
 The scrub system will be enabled with the scrub pressure set to the “Regular” (“Normal”) mode (#1) and the scrub



 The vacuum system will be enabled.
 The solution system will be enabled.
 As soon as either of the Palm Drive Buttons (29) is pressed, the scrub brushes will start turning and the
Reverse Button (28)


Scrub
Pressure Indicator (J2) on the panel display will show the current scrub pressure setting (1, 2 or 3).
Note: 

Vacuum Switch (C) – This switch is used to turn the vacuum system on or off. Pressing this switch will alternate
between on and off. The vacuum will only turn on when a Palm Drive Button (29) is pressed. It will remain on
for 10 seconds after the Palm Drive Buttons (29) are released.
The vacuum also has an automatic shutoff feature that will turn the vacuum and scrub systems off if the recovery tank becomes full.
Wand Switch (E): 
turn the vacuum on continuously without regard to the throttle position. If the scrub system was on it will be turned
Note: automatic


17 - FORM NO. 56043162 - Focus II Large
Control Panel
Description of Indicators
Each of the switches on the control panel have an indicator LED adjacent to the switch. Most LEDs are dual
channel and provide two colors within the same LED. In general, the following guidelines apply to the control panel

 A steady green indicator means that the particular system or function is on.
 A 
when a scrub mode is selected and the throttle goes from forward or reverse to neutral. When this happens the

delay period.
 A steady yellow indicator means that the particular function has been enabled and in a ready state, but is not

and solution indicators will all be yellow indicating that the systems are enabled and ready to turn on when the
throttle is moved to forward and/or reverse.
 A 

Solution System (B) Indicator:
 This indicator will be off if the solution is disabled and turned off.
 This indicator will be green if the solution is on.
 This indicator will be yellow if the solution is enabled but the drive paddle is in neutral.
 
Scrub ON Indicators (I1 & I2):
 For Regular scrub mode, the (I1) LED will be active.
 (I2) LED will be active.
 (I1&I2) LED’s will be active.
 
the neutral position, the LED’s (I1 and/or I2) will be solid yellow.
 
the drive position, the LED’s (I1 and/or I2) will be solid green.
 Both indicators will be off if the scrub system has been turned off.
Scrub OFF Indicator (H1):
 This indicator has green and red colors.
 The indicator will be green if the scrub system is off and ready to be activated.
 The indicator will be red if the scrub system has been turned off and the scrub deck is not up yet.
 
 The indicator will be off if the scrub system has been activated.
Vacuum System (C) Indicator:
 This indicator will be off if the vacuum is disabled and turned off.
 This indicator will be green if the vacuum is on.
 
 This indicator will be yellow if the vacuum is enabled but the drive pedal is in neutral.
 
Wand Switch (E) Indicator:
 This indicator uses green color only.
 This indicator will be green if the Wand Switch has been turned ON.
 This indicator will be off if the Wand Switch has been turned OFF.
 
Curtis Drive controller (See the Wheel System, Traction chapter for details).
B
I1 I2
H1
C
E

18 - FORM NO. 56043162 - Focus II Large
Control Panel
Scrub Mode Indicators
The Solution system and Scrub system have three scrub modes

controlled when the Scrub On Switch (I) is pressed, but the
Solution system can be controlled separately by pressing the
Solution Switch (B).
 Pressing the Scrub On Switch (I) once will set both the scrub
mode and solution mode to regular (and clear any solution
system overrides).
 Pressing the Scrub On Switch (I) twice will set both the scrub
mode and solution mode to heavy (and clear any solution system
overrides).
 Pressing the Scrub On Switch (I) for 5 seconds will set both

solution system overrides).
 Pressing the Solution Switch (B) once, twice, or for 5 seconds;
will change the solution mode accordingly, but without changing
the scrub mode.
The solution mode is displayed in a bar graph adjacent to the solution switch (B), and the scrub mode is indicated in
the display (J2) with a number representing the mode.

Battery Indicator
The charge state of the battery is shown in the main display area of the control
panel. This is is indicated by three colored LED’s (J1).
Hour Meter: The (J2)



are 135.6 total hours on the machine.
2
B
J2
Regular
Heavy
Extreme
2
J1 J2

19 - FORM NO. 56043162 - Focus II Large
Control Panel
Main Controller
The Main controller (A1), which includes the control board
and the display, is the primary electronic control for the


contoller chip to regulate function. The controller receives and
interprets user inputs, sensor inputs, and even some motor
amperage readings, and controls device output for the user
display, solenoid operation, and motor control. Most low and
medium power outputs are controlled with power MOSFET
transistors, with some moderately high power devices


contactors.
Another function of the main controller is to detect any system failures and display an error code on the display
panel or store it in the main control board’s memory. The error code(s) are used to help the service person determine

further information. An additional special feature of the main control board is to change program settings for a set of
 section in this chapter for further information.
Main Control Board Programming

replacing the controller with a new controller. The table below and following sections describe the parameters to be
programmed.
Programming Option Button(s) to Hold While Turning Key
Switch to On
Enter Service Test Mode Vacuum Switch (C)
Low-voltage Cut-out Threshold Scrub OFF Switch (H)
Enable/Disable Fault Detection Scrub OFF Switch (H)
Solution Switch (B)
Recall/Clear Stored Error Codes Solution Switch (B)
Controller Software Revision
Level Solution Switch (B) Vacuum Switch (C)
Scrub Deck Down Time Scrub OFF Switch (H)
Vacuum Switch (C)
Regular Scrub Setting Scrub OFF Switch (H)
Scrub ON Switch (I)
Heavy Scrub Setting Scrub ON Switch (I)
Vacuum Switch (C)
Extreme Scrub Setting Scrub ON Switch (I)
Solution Switch (B)
Restore Factory Default Scrub Settings Scrub ON Switch (I)
Recovery Tank-full Switch Orientation N/A

20 - FORM NO. 56043162 - Focus II Large
Control Panel
Displaying the Control Board Revision Level
During machine service, it may be helpful to know the control board revision level to determine machine

1. Turn the key switch to the off position.
2. While holding the Solution (B) and Vacuum (C) switches depressed, turn on the key
switch.
3. 
4. The LED display will show the revision level (letter) of the controller software.
5. 
Recall of Stored Error Codes
To assist with service troubleshooting, the controller maintains a list of past error codes. To recall and/or clear the
stored error codes perform the following steps:
1. Turn the key switch to the off position.
2. While holding the Solution Switch (B) depressed, turn the key switch to the on position.
3. Continue to hold the solution switch until the solution indicator turns green.
 If there are no error codes stored, the display will show “—”.
 If any error codes are stored, the scrub off indicator will be red and the display will show the error code

4. To clear the stored codes, press the scrub off switch. (It is recommended that error codes are cleared after
servicing so that future error codes represent only errors that occur between service intervals.)
 The display will now show “—”.
5. 
Turning Fault Detection On or Off:
If a fault occurs in a particular system, that system (and possibly others) will be shut down. This can make


Important: Make sure to turn Fault Detection back on before returning the machine to normal operation. To turn
the fault checking on or off:
1. Turn the key switch to the off position.
2. While holding the Scrub System Off (H) and the Solution (B) switches depressed, turn
on the key switch.
3. Continue to hold both switches until the indicators for both switches turn green.
4. Release both switches. The scrub off indicator will turn red.
5. Pressing the solution switch will toggle between fault detection enabled and disabled.
 The LED display will toggle between “E” (enabled) and “d” (disabled).
6. To save the setting, press the scrub off switch.
 The scrub off indicator will turn green.
7. Turn the key switch to the off position. The new setting will be saved and will remain in effect until it is
changed again.
C
B
B
HB