Clarke Encore S28XP User manual

Electronic Service
Manuals
This electronic document is provided as a service to our customers.
Wedonotcreatethecontentsoftheinformationcontainedinthisdocu-
ment. Shouldyouhavedetailedquestionspertainingtotheinformation
contained in this document, you may contact Michco, or the manufac-
turer which provided the original information in this electronic deliver-
able. Michco’sonlypartin this electronic deliverable was the electronic
assemblyprocess. Byprovidingthismanualonlinewearenotguaran-
teeing parts availability.
You may contact Michco through the following methods:
Phone [phone] or [phone]
2011 N. High St. -- Lansing, Michigan -- 48906
Fax: [phone]
Email: [email protected]
Web site: www.Michco.Com
Parts Web site: www.FloorMachineParts.Com
Order Parts on Line at:
www.FloorMachineParts.Com
Directly to Parts & Service:
By Email: [email protected]
By Fax: [phone]
By Voice: Use numbers above.
Serving the Cleaning Industry Since 1922
Notice: All copyrighted material remains property of original owners, all trademarks are property of respective owners.
ManualsaresubjecttoManufacturer’sreproductionlimitations. Originalsorreproductionswereprovidedbymanufacturers
through a request. We make no warranty as to the correctness of information provided in this document and you assume
allrisk. By placing thesemanualsonlinewe are notdeclaringourcorporation to be anmanufacturerauthorizeddealer or
provider, please check ourwebsiteforauthorizedmanufacturerswerepresent.

Form No. 70657A 8/04 Clarke®Printed in the U.S.A.
READ THIS BOOK
This book has important information for the use and safe operation of this machine. Failure to read this
bookpriortooperatingorattemptinganyserviceormaintenanceproceduretoyourClarkemachinecould
result in injury to you or to other personnel; damage to the machine or to other property could occur as
well. You must have training in the operation of this machine before using it. If your operator(s) cannot
read English, have this manual explained fully before attempting to operate this machine.
Si Ud. o sus operadores no pueden leer el Inglés, se hagan explicar este manual completamente antes
de tratar el manejo o servicio de esta máquina.
All directions given in this book are as seen from the operator’s position at the rear of the machine.
For new books write to: Clarke®, 2100 Highway 265, Springdale, Arkansas 72764.
Operator's
Manual
ENCORE
S28XP
S33XP
S38XP
U.S. Patent No. 6,105,192; No. 5,383,251; No. 6,557,207

Page -2- Clarke®Operator's Manual -Encore S28XP/S33XP/S38XP
Table of Contents
OperatorSafetyInstructions .............................................................................................................................. 3
Introduction&MachineSpecifications ................................................................................................................ 5
ProceduresForTransporting ............................................................................................................................. 6
SymbolsUsedOn EncoreMachines ................................................................................................................. 7
MachineControlPanel ....................................................................................................................................... 8
MachineControlsandFeatures ......................................................................................................................... 9
HowToPrepareTheMachineForOperation ..................................................................................................... 10
HowToInstallTheBatteries ................................................................................................................ 10
BatteryMaintenance ............................................................................................................................ 11
HowToChargeTheBatteries ............................................................................................................. 12
How To Install The Brushes Or Pad Drivers ........................................................................................ 13
How To Remove The Brushes Or Pad Drivers .................................................................................... 13
How To Operate The Machine ......................................................................................................................... 14
How To Operate The Scrub Deck ...................................................................................................... 14
How To Operate The Squeegee........................................................................................................ 14
How To Fill The Solution Tank........................................................................................................... 15
How To Operate Machine .................................................................................................................. 15
How To Clean A Floor ........................................................................................................................ 16
Maintenance ..................................................................................................................................................... 17
Accessories...................................................................................................................................................... 22
Section II Parts and Service Manual
How To Correct Problems In The Machine...................................................................................................... 24
Maintenance, Head Position System............................................................................................................... 25
Swing Arm Assembly Drawing......................................................................................................................... 26
Parts List ............................................................................................................................................ 27
SqueegeeAssemblyS28XPandS33XP............................................................................................................ 28
Parts List............................................................................................................................................. 29
SqueegeeAssemblyS38XP .............................................................................................................................. 30
Parts List............................................................................................................................................. 31
TraverseSystemAssembly Drawing ................................................................................................................. 32
Parts List ............................................................................................................................................ 33
BrushHeadAssemblyDrawing ......................................................................................................................... 34
Parts List ............................................................................................................................................ 35
Solution/RecoverySystemAssemblyDrawing................................................................................................... 36
Parts List ............................................................................................................................................ 37
Brush Motor Drawing & Parts List.................................................................................................................... 38
Gear Box Assembly Drawing & Parts List ....................................................................................................... 39
VacMotor .......................................................................................................................................................... 40
Imperial Transaxle Drawing and Parts List ..................................................................................................... 41
36 Volt Battery Charger Drawing & Parts List .................................................................................................. 42
Components for machines with 41135C Traverse Controller ........................................................................ 43-59
Control Housing Assembly Drawing ................................................................................................. 44
Parts List....................................................................................................................................... 45
Rear Cover Assembly Drawing ......................................................................................................... 46
Parts List....................................................................................................................................... 47
Electrical Schematic .......................................................................................................................... 48
Connection Diagram ......................................................................................................................... 49
Components for machines with 40089A Traverse Controller......................................................................... 51-57
Control Housing Assembly Drawing ................................................................................................. 52
Parts List....................................................................................................................................... 53
Rear Cover Assembly Drawing ......................................................................................................... 54
Parts List....................................................................................................................................... 55
Electrical Schematic .......................................................................................................................... 56
Connection Diagram ......................................................................................................................... 57

Clarke®Operator's Manual - Encore S28XP/S33XP/S38XP - 3 -
OPERATOR SAFETY INSTRUCTIONS
WARNING AVERTISSEMENT ADVERTENCIA
DANGER: Failure to read and observe all DANGER statements could result in
severe bodily injury or death. Read and observe all DANGER
statements found in your Owner's Manual and on your machine.
WARNING: Failure to read and observe all WARNING statements could result
in injury to you or to other personnel; property damage could
occur as well. Read and observe all WARNING statements found in
your Owner's Manual and on your machine.
CAUTION: Failure to read and observe all CAUTION statements could result in
damage to the machine or to other property. Read and observe all
CAUTION statements found in our Owner's Manual and on your
machine.
DANGER: Failure to read the Owner's Manual prior to operating or attempting any service or
maintenance procedure to your Clarke machine could result in injury to you or to
other personnel; damage to the machine or to other property could occur as well.
You must have training in the operation of this machine before using it. If your
operator(s)cannotreadEnglish,havethismanualexplainedfullybeforeattempting
to operate this machine.
DANGER: Operating a machine that is not completely or fully assembled could result in
injury or property damage. Do not operate this machine until it is completely
assembled. Inspect the machine carefully before operation.
DANGER: Machines can cause an explosion when operated near flammable materials and
vapors. Do not use this machine with or near fuels, grain dust, solvents, thinners,
or other flammable materials. This machine is not suitable for picking up
hazardous dust.
DANGER: Lead acid batteries generate gases which can cause an explosion. Keep sparks
and flames away from batteries. Do not smoke around the machine. Charge the
batteries only in an area with good ventilation. Make sure that you unplug the AC
charger from the wall outlet before diconnecting from the machine.
DANGER: Working with batteries can be dangerous! Always wear eye protection and
protective clothing when working near batteries. Remove all jewelry. Do not put
tools or other metal objects across the battery terminals, or the tops of the
batteries.
DANGER: Using a charger with a damaged power cord could result in an electrocution. Do
not use the charger if the power cord is damaged.
WARNING: Operating this machine from anywhere other than the back of the machine could result
in injury or damage. Operate this machine only from the rear.
WARNING: This machine is heavy. Get assistance before attempting to transport or move it. Use
two able persons to move the machine on a ramp or incline. Always move slowly. Do
not turn the machine on a ramp. If operating machine on a gradient over 2%, do not
stop, turn or park. Read the "Procedures For Transporting" in this manual before
transporting.
WARNING: Machines can topple over if guided over the edges of stairs or loading docks and cause
injury or damage. Stop and leave this machine only on a level surface. When you stop
the machine, turn the key "OFF". Set the parking brake.

Page -4- Clarke®Operator's Manual -Encore S28XP/S33XP/S38XP
WARNING: Maintenance and repairs performed by unauthorized personnel could result in damage
or injury. Maintenance and repairs must be performed by authorized Clarke personnel
only.
WARNING: Any alterations or modifications of this machine could result in damage to the machine
or injury to the operator or other bystanders. Alterations or modifications not authorized
by the manufacturer voids any and all warranties and liabilities.
WARNING: Electrical components of this machine can "short-out" if exposed to water or moisture.
Keep the electrical components of the machine dry. Wipe the machine down after each
use. For storage, keep the machine in a dry building.
WARNING: Operating a machine without observing all labels and instructional information could
result in injury or damage. Read all machine labels before attempting to operate. Make
sure all of the labels and instructional information are attached or fastened to the
machine. Get replacement labels and plates from your Clarke distributor.
WARNING: Wet floor surfaces can be slippery. Water solutions or cleaning materials used with this
type of machine can leave wet areas on the floor surface. These areas can cause a
dangerous condition for the operator or other persons. Always put "Caution" signs
around/near the area you are cleaning.
WARNING: Improper discharge of waste water may damage the environment and be illegal. The
United States Environmental Protection Agency has established certain regulations
regarding discharge of waste water. Also, city and state regulations regarding this
discharge may be in your area. Understand and follow the regulations in your area. Be
aware of the environmental hazards of chemicals that you dispose.
CAUTION: Use of this machine to move other objects or to climb on could result in injury or dam-
age. Do not use this machine as a step or furniture. Do not ride on this machine.
CAUTION: Your machine warranty will be voided if anything other than genuine Clarke parts are
used on your machine. Always use Clarke parts for replacement.

Clarke®Operator's Manual - Encore S28XP/S33XP/S38XP - 5 -
Introduction & Machine Specifications
Introduction & Machine Specifications
Clarke’s newly designed Encore 38XP, 33XP and 28XP automatic scrubbers are efficient and superior floor
cleaning machines. The Encore 38XP uses two brushes or pads to scrub a path 38 inches wide. The Encore
33XP uses two brushes or pads to scrub a path 33 inches wide. The Encore 28XP uses two brushes or pads
to scrub a path 28 inches wide. A squeegee wipes the floor while the vacuum motor removes the dirty solution
from the floor - all in one pass.
The Encore 38XP, 33XP and 28XP automatic scrubbers come complete with six - 6 volt batteries, five battery
connector cables, one battery cable assembly, one battery charger, either two brushes or two pad drivers,
and one operator’s manual.
SPECIFICATIONS:
Model S38XP-00691A S33XP-00671A S28-00651A
Motor, Vac 1HP(.67kw)three 1HP(.67kw)three 1HP(.67kw)three
stage tangential stage tagential stage tagential
discharge discharge discharge Power
Supply 36 volt (6-6V batteries) 36 volt (6-6V batteries) 36 volt (6-6V batteries)
250AH,330AH,or370AH 250AH,330AH,or370AH 250AH,330AH,or370AH
Solution Tank 30 gallon (114 liter) 30 gallon (114 liter) 30 gallon (114 liter)
Recovery Tank 30 gallon (114 liter) 30 gallon (114 liter) 30 gallon (114 liter)
Motors, Brush (2) 1 hp PM (.74kw) .75 hp PM (.56kw) .75 hp PM (.56kw)
Motor Traction .50 hp PM (.37kw) .50 hp PM (.37kw) .50 hp PM (.37kw)
Brushes (2) 19 inch (48cm) 17 inch (43cm) 14 inch (36cm)
w/.5" (1.5cm) overlap w/1" (3 cm) overlap w/.5" (1.5 cm) overlap
Brush Speed 200 rpm 200 rpm 200 rpm
BrushPressure Variable 150 lbs. - 200 lbs. Variable 150 lbs. - 200 lbs. Variable 150 lbs. - 200 lbs.
Speed,Forward Variable to 230 ft./min. Variable to 230 ft./min. Variable to 230 ft./min.
Speed,Reverse Variable to 180 ft./min. Variable to 180 ft./min. Variable to 180 ft./min.
Charger 36V, 25A, 115V/60hz 36V, 25A, 115V/60hz 36V, 25A, 115V/60hz
Length 66 inches (168cm) 63 inches (160cm) 62.5 inches (159cm)
Width - Machine 28 inches (71cm) 28 inches (71 cm) 28 inches (71 cm)
Height 44 inches (112cm) 44 inches (112 cm) 44 inches (112 cm)
Cleaning Rate 42,000 sq ft/hr 35,000 sq ft/hr 29,7000 sq ft./hr
(3,901 sq. m/hr) (3,252 sq. m/hr) (2,750 sq ft./hr)
Cleaning Swath 37.5 inch (95.3cm) 33 inch (84cm) 28, inch (70cm)
Grade Cleaning 6° Incline 6° Incline 6° Incline
Weight w/Batteries (330AH) 1038 lbs. 471kg 1028 lbs. 467kg 1018 lbs. 462kg
Shipping Weight 1341 lbs. 608kg 1331 lbs. 604kg 1321 lbs. 599kg
w/batteries (330AH)

Page -6- Clarke®Operator's Manual -Encore S28XP/S33XP/S38XP
PROCEDURES FOR TRANSPORTING
How To Put The Machine In A Van Or Truck
WARNING: The machine is heavy. Make sure you use two able persons to assist
the machine in climbing the ramp.
1. Make sure the loading ramp is at least eight (8) feet long, and strong enough to support the machine.
2. Make sure the ramp is clean and dry.
3. Put the ramp in position.
4. Remove squeegee assembly, brush housings, & brushes or pad drivers before loading.
5. Turn key switch "ON".
6. Align the machine on a level surface ten (10) feet in front of the ramp.
7. Put the traverse speed switch in the "HI" position.
8. Push the control handles toward the machine all the way.
9. Push the machine to the top of the ramp.
10. Turn the key switch "OFF".
11. Fasten the machine to the vehicle.
How To Remove The Machine From A Van Or Truck
1. Make sure there are no obstructions in the area.
2. Make sure the unloading ramp is at least eight (8) feet long and strong enough to support the machine.
3. Make sure the ramp is clean and dry.
4. Put the ramp in position.
5. Unfasten the machine.
WARNING: The machine is heavy. Make sure you use two able persons to assist in
moving the machine down the ramp.
6. Turn the key switch "ON".
7. Carefully and slowly, pull the machine to the top of the ramp.
8. Put the traverse speed switch in the "HI" position.
9. As the machine begins to travel down the ramp, push the control handles toward the machine to
maintain a slow downward speed.
10. Replace squeegee assembly, brush housings, & brushes or pad drivers after the machine is unloaded
and ready to use.

Clarke®Operator's Manual - Encore S28XP/S33XP/S38XP - 7 -
SYMBOLS USED ON ENCORE S38XP, S33XP,
S28XP
Warning
Power
On/Off Key Switch
Traverse Speed Control
Solution Contro
Brush Up/Down
Battery Meter
Hour Meter
Increase Brush Pressure
Warning Label

Page -8- Clarke®Operator's Manual -Encore S28XP/S33XP/S38XP
MACHINE CONTROL PANEL
KeySwitch (SeeFigure#1,Item"A")
Thekey switch turns "ON" the power tothe control panel. "0" is "OFF" and "1" is "on".
Traverse Speed Switch (See Figure #1, Item "B")
The speed control varies from low to high speed. To increase the speed, turn the knob to the right. To decrease the speed,
turntheknobtotheleft.
Brush Up/Down Switch (See Figure#1,Item "C")
The brush switch has two positions: "Up" positions the brushes up; "Down" positions the brushes on the floor. The brush
motors start when the brushes are down.
Increase Brush Pressure Switch (See Figure #1, Item L)
This switch is used to increase the brush pressure. Increased brush pressure may be required when stripping or
cleaning heavily soiled floors. To increase brush pressure, first lower the brushes by pressing the brush up/down
switch (Item "C") to the down position. This will lower the brushes to the normal scrub position. To increase brush
pressure, press and hold the switch (Item "L") until the desired brush pressure is reached or the brush deck stops
moving downward. To reposition the brush pressure to normal scrub, press the brush up/down switch (Item "C") to
the up position and after the brush deck is completely raised, then return the switch to the down position for normal
scrub.
Solution Control Knob (See Figure #1, Item "D")
The solution control knob regulates the flow of cleaning solution to the floor. To increase the flow turn the knob
clockwise. To decrease the flow, turn the knob counter-clockwise.
Control Handle (SeeFigure #1, Item "E")
The control handle is located at the rear of the machine. It controls the direction of the machine. Push forward to go
forward.(See Figure#3, page 10). Pullback tomove inreverse. (SeeFigure #4, page10).
Circuit Breakers (See Figure #1, Item"F"-"J")
Thecircuit breakerreset buttonsare locatedon therear cover,below thecontrol handle. The breakers are located as
follows: Item F & G - Brush Motors (35A); Item H - Traverse Motor (30A); Item I - Vac Motor (25A); Item J - Actuator
Motor, Brush Head (5A)
If a circuit breaker trips, determine which motor is not operating and turn the key switch "OFF". Wait five minutes and push
thereset buttonback in. Turn the key switch "ON", andtry again. Anauthorized serviceperson should be contacted if the
breakertripsagain.
Hour Meter (See Figure #1, Item "K")
Thehour meter indicates the number of hours the machine has operated. It runs onlywhen the machineis moving forward
orreverse.
Figure #1
E
A
B
C
D
JIHGF
K
L

Clarke®Operator's Manual - Encore S28XP/S33XP/S38XP - 9 -
MACHINE CONTROLS & FEATURES
Squeegee Lift Handle See Figure #5a, 5b, & 5c.
Thesqueegee lifthandle islocatedbelow thecontrol handles
on the right side. It is used to raise or lower the squeegee.
Thevac motoris turnedonwhen thehandleis lowered.(S38,
S33 & S28 models only).
Parking Brake (Optional)See Figure #6.
Theparkingbrake preventsmovementof themachine. The
brakeis located on the left hand side of the transaxle motor.
Turnthekeyswitchoffor disconnectthepower tothebattery
toapply the brake.
Thereisamechanicalleverlocatedonthebrake. Thislever
isan override. To manually release the brake,rotatethe
levertoward therearof machine (counterclockwise). To
returnthe brake tonormalor to applythebrake, rotate the
lever towards the front of the machine (clockwise). NOTE:
If the lever is left in the override position, the brake will
not function with the key switch, and the machine will
not operate.
CAUTION: Do not activate the brake while the machine
ismoving.
Float Shut Off See Figure #7.
Theshut-offswitchforthevacmotoris locatedin therecov-
erytank. Itautomaticallyturnsoffthevacmotorwhenthe
recoverytankisfull.
Figure#5a
Figure #5b
Figure#5c
Figure #7
Figure #6

Page -10- Clarke®Operator's Manual -Encore S28XP/S33XP/S38XP
HOW TO PREPARE THE MACHINE FOR OPERATION
How To Install The Batteries
The 38, 33 and 28 Encore machines use six 6-volt or
three 12-volt batteries. The batteries are located in
the battery compartment under the recovery tank.
To Install the batteries, follow this procedure:
1. Turn key switch off.
2. Make sure both tanks are empty.
3. Disconnect the hoses from the recovery tank
(upper tank) & unplug the vac motor.
Remove the recovery tank.
4. Place the batteries in the solution tank as
shown in figures 8a - 8d.
WARNING: Lifting batteries without
help could result in an
injury. Get help to lift the
batteries. The batteries are
heavy.
WARNING: Working with batteries can
be dangerous. Always
wear eye protection and
protective clothing when
working near batteries.
NO SMOKING!
5. Connect the battery cables between
batteries and install long battery cable
assembly as indicated. See figure 8a - 8d.
Figure #8a
Figure #8b
Figure #8cFigure #8d
38720B
38722B
38722B
38720B
38722B
38720B
38720B
38720B
38722B
38722B
38720B
38720B
38722B
38722B
38720B
38720B
38722B
38722B

Clarke®Operator's Manual - Encore S28XP/S33XP/S38XP - 11 -
6. Join the connector from the battery pack to
the connector on the control panel. See
figure #9.
7. Install the tank, reconnecting hoses and
replace the two screws attaching the
solution tank to the rear of the frame.
NOTE: Charge the batteries before using the
machine.
Battery Maintenance
The electrical power to operate the machine comes from
the storage batteries. Storage batteries need preventive
maintenance.
WARNING: Workingwithbatteriescanbe dan-
gerous. Always wear eye protec-
tion and protective clothing when
working near batteries.
NO SMOKING!
To maintain the batteries in good condition, follow these
instructions:
1. Keeptheelectrolyteatthecorrectlevel. Thecorrect
levelis between 1/4"below the bottomof thetube in
eachcellandabovethetopsoftheplates. Checkthe
level of the electrolyte each time you charge the
batteries. See figure #10.
NOTE: Checkthelevelofelectrolytepriortochargingthe
batteries. Besuretheplates ineachcellarecoveredwith
electrolyte . Do not top off the cells prior to charging the
battery. Electrolyteexpandsduringcharging. Asaresult,
the electrolyte could overflow from the cells. Always top
off the cells with distilled water after charging.
CAUTION: Irreversible damage will occur to
the batteries if the electrolyte level
doesnotcovertheplates. Keepthe
electrolyte at the correct level.
CAUTION: Machine damage and discharge
acrossthetopsofthebatteriescan
occur if the batteries are filled
above the bottom of the tube in
eachcell.Donotfillthebatteriesup
to the bottom of the tube in each
cell. Wipe any acid from the ma-
chine or the tops of the batteries.
Never add acid to a battery after
installation.
CAUTION: Tap water may contain contami-
nants that will damage batteries.
Batteriesmustbere-filledwithdis-
tilled water only.
Figure #10
HOW TO PREPARE THE MACHINE FOR OPERATION
Figure #9
Correct fill level
2. Keep the tops of the batteries clean and dry.
Keep the terminals and connectors clean. To
clean the top of the batteries, use a damp cloth
witha weaksolutionofammoniaorbicarbonate
of soda solution. To clean the terminals and
connectors,useaterminalandconnectorclean-
ingtool. Donotallowammoniaorbicarbonateof
soda to get into batteries.
3. Keep the batteries charged.

Page -12- Clarke®Operator's Manual -Encore S28XP/S33XP/S38XP
How To Charge The Batteries
WARNING: Chargingthe batteries inan area
without adequate ventilation
could result in an explosion. To
preventanexplosion,chargethe
batteries only in an area with
good ventilation.
WARNING: Lead acid batteries generate
gases which could explode.
Keep sparks and flames away
from batteries. NO SMOKING!
WARNING: FailuretodisconnecttheACplug
from the wall receptacle before
connectingordisconnectingthe
DC connector on the charger
could result in an explosion. Al-
ways disconnect the AC plug
from the wall receptacle before
connectingordisconnectingthe
DC connector on the charger.
To charge the batteries, follow this procedure:
1. Put the charger on a flat surface. Make sure the
vents on the sides are at least two inches away
fromwallsandotherobjects. Makesurethereare
no objects near the vents on the bottom of the
charger.
2. Make sure the key switch is in the “OFF” position.
3. Disconnect the battery pack connector from the
control housing connector. See figure #11.
4. Connect the DC connector on the charger to the
battery pack connector. See figure #12.
5. Connectthechargertoaproperlygroundedsingle
phase(3-wire) wall receptaclehavingthevoltage,
frequency, and ampere capacity specified on the
nameplate of the charger.
Formore instruction on theuseofthecharger,read the
instruction book supplied with the charger.
HOW TO PREPARE THE MACHINE FOR OPERATION
Figure # 11
Figure #12

Clarke®Operator's Manual - Encore S28XP/S33XP/S38XP - 13 -
How To Install The Brushes Or Pad Drivers
To install the brushes or pad drivers on the machine,
follow this procedure:
1. Turn the key switch "ON".
2. Put the brush switch in the "UP" position.
3. Turn the key switch "OFF".
4. Go to the front of the machine.
5. Unlatch right and left brush housings and remove
them. See figure #13.
6. Putabrushorpaddriverunderthebrushmotorplate.
See figure #14.
7. Alignthelugsonthemotorgimbalwiththeslotsinthe
brush gimbal.
8. Pull the brush up until the gimbal locks.
9. Repeat steps 6, 7, and 8 to install the second brush
or pad driver.
How To Remove The Brushes Or Pad Drivers
To remove the brushes or pad drivers from the
machine,follow this procedure:
1. Turn the key switch "ON".
2. Put the brush switch in the "UP" position.
3. Turn the key switch "OFF".
4. Go to the front of the machine.
5. Pushdownontwosidesofthebrushorpaddriveruntil
the gimbals release.
HOW TO PREPARE THE MACHINE FOR OPERATION
Figure #13
Figure #14

Page -14- Clarke®Operator's Manual -Encore S28XP/S33XP/S38XP
HOW TO OPERATE THE MACHINE
How To Operate The Scrub Deck
Brushes or pads are used along with a solution mix to agitate
and scrub the floor. Many different types of brushes or pads are
available (see accessory section) for different scrubbing
applications. See your Clarke representative for proper brush or
pad requirements. To operate the brushes or pads follow this
procedure:
1. Install the brushes or pads and replace the brush
housings. See section on How To Install the Brushes Or
Pad Drviers.
2. Fill the solution tank. See section on How To Fill The
Solution Tank.
3. Lower the brush deck by pressing the Up/Down brush
switch to the down position (figure 15, A). This will place
the brush deck in the normal scrub position.
4. If additional brush pressure is desired, such as when
stripping or cleaning a heavily soiled floor, more pressure
can be applied. After the brush deck has been lowered to
the floor, additional brush pressure can be applied by
pressing and holding the jog button switch (figure 16, B)
until the desired brush pressure is reached or until the
brush deck stops moving downward. To reposition the
brush pressure to normal scrub, press the brush up/
down switch to the up position and after the brush deck
has completely raised, then return the switch to the down
position for normal scrub.
5. The brushes/pads and solution will start when the
traverse control handle (figure 16, C) is pushed forward
or pulled to the rear. Note: The brushes/pads and
solution will only operate when the brush deck is in the
down position and the traverse control handle is pushed
forward or pulled to the rear.
6. Stop the brushes/pads and solution flow by releasing the
traverse control handle, or raising the brush deck to the
full up position.
How To Operate the Squeegee
("SClass"modelsonly)
The squeegee wipes the floor while the vacuum motor removes
the dirty solution from the floor. Use your right hand to lower or
raise the squeegee handle. To operate the squeegee, follow
this procedure:
1. To lower the squeegee and start the vac motor move the
squeegee lever to the right and down. See figure #17.
2. To raise the squeegee, lift the squeegee lever up. See
figure #18.
Note: The center position lets the vac motor continue to run
with the squeegee off the floor to avoid drips.
Figure #15
Figure #16
Figure #17
Figure #18
A
B
C

Clarke®Operator's Manual - Encore S28XP/S33XP/S38XP - 15 -
How to Fill The Solution Tank
CAUTION: Make sure water or solution does not
enter the opening for the vacuum motor ,See figure #19.
The solution tank lid is at the front. To fill the solution tank
follow this procedure:
1. Remove the solution tank lid. See figure #20
2. Fill the solution tank with water.
3. Add a cleaning chemical to the water. for the correct
amount, follow the directions shown on the container.
WARNING: Water solutions or cleaning materials
used with this type of machine can leave
wet areas on the floor surface. These
areas can cause a dangerous condition
for the operator or other persons. Always
put CAUTION signs near the area you are
cleaning.
WARNING: Machines can ignite flammable materials
and vapors. Do not use with or near
flammables such as gasoline, grain
dust, solvents, and thinners. Only use a
cleaning concentration recommended by
the chemical manufacturer.
WARNING: Clarke recommends a maximum water
temperature of 120°F(49°C)
4. Replace the solution tank lid.
How To Clean A Floor
NOTE: Put the machine in the slow traverse speed. Use the
machine in an area that has no furniture and objects until you
candothefollowing:
1. Move the machine in a straight direction, forward and back-
ward.
2. Stop the machine safely.
3. Move the machine in a straight direction after you turn the
machine.
To move the machine, follow this procedure:
1. Turn the key switch “ON” position.
2. Put the brush switch in the "UP" position.
3. Raisethesqueegee.
4. To go forward, push the control handles toward the
machine. Seefigure#21.
5. To stop the machine, put the handles in the center
position.
6. To go backward, pull the handles away from the ma-
chine. See figure #22.
7. Toturnthemachine,pushtherearofthemachinetothe
side.
8. Whenyoustopthemachine,turnthekeyswitch"OFF".
HOW TO OPERATE THE MACHINE (cont.)
Figure # 19
Figure # 20
Figure # 21
Figure # 22

Page -16- Clarke®Operator's Manual -Encore S28XP/S33XP/S38XP
HOW TO OPERATE THE MACHINE (cont.)
HOW TO CLEAN A FLOOR
WARNING: Water solutions or cleaning mate-
rialsusedwiththistypeofmachine
can leave wet areas on the floor
surfaces. Theseareascan causea
dangerousconditionfortheopera-
tor or other persons. Always put
CAUTION signs near the area you
are cleaning.
To clean a floor, follow this procedure:
1. Put the water and a cleaning chemical in the clean
solution tank.
2. Turn the key switch "ON".
3. Lower the squeegee.
4. Put the brush switch in the "DOWN" position.
5. Turnthesolutionknobtotherighttoactivatetheflow
of solution. Adjust the flow of clean solution to the
flow desired.
6. Move the machine across the floor in the forward
direction.Seefigure#23(1).
7. When the machine is one machine length from the
endoftheareatobecleaned(figure#23(2)),rotatethe
solution knob to the left.
8. Makea 1800turn. Seefigure #23 (3).
NOTE: Whenyoumakemorepassesacrossthefloor,let
the brushes clean approximately 2 inches of the
areaalready cleaned bythebrushes.Seefigure
#23(4).
NOTE: During most cleaning procedures, apply and
remove the solution in one operation.
HOW TO CLEAN A VERY DIRTY FLOOR
To clean a very dirty floor, follow this procedure:
1. Apply solution to the floor.
2. Do not lower the squeegee.
3. Do not activate the vacuum motor.
4. Lowerthe brushesandscrubthefloor.
NOTE: Additional brush pressure may be applied (see
sectiononHowToOperate Scrub Deck).
5. Leave the solution on the floor long enough for the
solution to begin cleaning the floor.
6. Scrubtheflooragainwithadditionalsolution,picking
up all the solution with the squeegee
Figure #23
3
4
2

Clarke®Operator's Manual - Encore S28XP/S33XP/S38XP - 17 -
WARNING: Maintenance and repairs must be
donebyauthorizedpersonnelonly.
WARNING: Alwaysempty the solutiontank and
recovery tank before doing any
maintenance.
WARNING: Keep all fasteners tight.
These Maintenance Procedures Must Be Done Ev-
ery Day
Keep the machine clean, it will need fewer repairs and
have longer life.
Do These Procedures When You Begin Your Work
Period
1. Turn off key switch.
2. Disconnect the plug on the charger from the
connectoronthebackofthemachine. Seefigure
#24.
3. Join the connector from the batteries (1) to the
controlpanel cable connection. Seefigure #24.
4. Make sure the recovery tank lid is on correctly.
See figure #25, Item A.
5. MakesuretheScreenfilteroverthevacuummotor
is clean and in position. See figure #26, Item B.
6. Makesurethevalvesonthedrainhosesareclean.
Tightly close the valves.
7. Make sure brush housings and skirts are in
position on the brush head.
8. Make sure the brushes are in position and
installed correctly
9. Check the installation of the squeegee and
squeegee hose.
MAINTENANCE
Figure #24
Figure #25
Figure #26

Page -18- Clarke®Operator's Manual -Encore S28XP/S33XP/S38XP
Do These Procedures When You End Your Work
1.Drain thesolutiontank(Figure #27a)andtherecovery
tank (Figure #27b). To drain the tanks , follow this
procedure:
2.Drain thesolutiontank(Figure #27a)andtherecovery
tank (Figure #27b). To drain the tanks , follow this
procedure:
a. Turn the key switch “OFF”.
b. Remove the drain hose from the back of the
machine.
c. Puttheendofthehoseoveradrainorbucket.
d.Turnthevalvehandletotheleft.Pullthehandle
outtoopenthe drain. (Figure #27c)
NOTE: Havetheopeninginthesideofthevalveaway
from you when you open the valve.
e. Toopenthe valvecompletely,turnthehandle
to the right. Pull the handle out of valve.
(Figure#27d)
2. Flush the tanks. To flush the tanks, put clean water in
the tank through the opening on top of the tank.
3. If a tank or drain hose has an obstruction, use a high
pressurewaterhosetoflushthetankorhose. Putthe
water hose into the drain hose.
4. Leavethe tanks andthedrainvalvesopen to dryinthe
air.
5. Check the squeegee blade. Use a cloth to clean the
squeegeeblade. Ifthesqueegeebladeisdamagedor
worn, turn or replace the blade.
6. Check and clean the solution lid gasket. Use a mild
cleaning solution and rinse the parts in clean water.
Check the batteries and add distilled water as needed.
Thecorrectleveliswithin 1/4inchofthebottomofthetube
in each cell.
CAUTION:Tap water may contain contami-
nants that will damage batteries.
Batteries must be re-filled with
distilled water only.
WARNING: Lead acid batteries generate
gases which can cause an explo-
sion. NOSMOKING. Alwayswear
eye protection and protective
clothing when working near
batteries.
Use a clean cloth and wipe the surface of the machine.
Chargethe batteries. Seetheinstructioninthesectionof
this book called “How To Charge The Batteries”.
MAINTENANCE
Figure #27a
Figure #27b
Figure#27c
Figure #27d
25

Clarke®Operator's Manual - Encore S28XP/S33XP/S38XP - 19 -
These Maintenance Procedures Must Be Done Every
Week:
WARNING: Maintenance and repairs must be
done by authorized personnel only.
Always empty the solution tank and
the recovery tank before doing any
maintenance. Keep all fasteners
tight.
WARNING: Always wear eye protection and pro-
tective clothing when working near
batteries. Do not put tools or other
metal objects across the battery ter-
minals or the tops of the batteries.
CAUTION: To prevent damage to the machine,
anddischarge across the tops of the
batteries, do not fill the batteries
above the bottom of the tube in each
cell. Wipeanyacidfromthemachine
or the tops of the batteries. Do not
add acid to battery after installation.
NOTE:Alwaysturnoffkeyswitchbeforeservicingthe
machine.
WARNING: Always wear eye protection and
protective clothing when working
near batteries. NO SMOKING!
1. Toinspectbatteries,tipup recovery tank until it locks
in up position. See Figure #28.
2. Disconnect the batteries. Use a cloth and a solution
of ammonia or bicarbonate of soda to wipe the top of
the batteries. Clean the battery terminals. Recon-
nect the batteries.
3. Check the hoses for leaks, obstructions and other
damages.
4. Checkandcleanthefilterscreeninthesolutionhose.
To clean the screen, follow this procedure:
a. Turn the connector to the left.
b. Remove and clean the filter screen.
c. Installthe filter screen inthe hose. Turnthe
connector to the right to connect the hose.
5. Useagrease gun to lubricatethe drive wheel andthe
casters. See figure #29.
6. Checktirepressure. Tirepressureshouldbeabout50
psi.
MAINTENANCE
Figure #28
Figure #29