American-Lincoln Alto SR7770HC User manual

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American-Lincoln®
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:
READ THIS BOOK
Alto U.S., Inc., 1100 Haskins Road, Bowling Green, Ohio 43402
This book has important information for the use and safe operation of this machine. Failure
to read this book prior to operating or attempting any service or maintenance procedure to
your 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 you or your operator(s) cannot read English, have this manual explained
fully before attempting to operate this machine.
Si Ud. o sis operadores no pueden leer el Inglés, se hagen explicar este manual completamente
antes de tratar el manejo o servicio de esta máquina.
Part No. 2-86-00301 2002 Printed in theAmerican-Lincoln USA
®
Model SR HC
Scrubber
7770
Operator's Manual
Instruction Book
and Parts List
Beginning Serial Number 777001
E

American-Lincoln®1-1
SR7770HCOperator’sManual
TABLE OF CONTENTS
SPECIFICATIONS ...................................................................................................................................1-4
MACHINEDIMENSIONS.........................................................................................................................1-6
STANDARDHARDWARE&TORQUEVALUES ..................................................................................... 1-7
HYDRAULICTORQUEREQUIREMENTS ...............................................................................................1-8
DECIMAL-METRIC CONVERSIONTABLE ............................................................................................1-9
MACHINEOPERATION ..........................................................................................................................1-10
SAFETYINSTRUCTIONS .......................................................................................................................1-11
OPERATIONOFCONTROLSANDGAUGES .........................................................................................1-12
IGNITIONSWITCH ............................................................................................................................1-12
LIGHTSWITCH................................................................................................................................. 1-12
HORNPUSHBUTTON .....................................................................................................................1-12
CHECKENGINE (WARNINGLIGHT) ................................................................................................1-13
WATERTEMPERATUREGAUGE .................................................................................................... 1-13
HOURMETER.................................................................................................................................. 1-13
FUELGAUGE .................................................................................................................................. 1-13
OILPRESSUREGAUGE .................................................................................................................1-13
VOLTMETER ...................................................................................................................................1-13
SCRUBBRUSHESSWITCH ............................................................................................................ 1-13
BRUSHROTATIONSWITCH.............................................................................................................1-13
SCRUBDECKSWITCH ................................................................................................................... 1-14
SQUEEGEEBLADESWITCH..........................................................................................................1-14
HIGHLEVEL WARNINGLIGHT ........................................................................................................1-14
LOWLEVELWARNINGLIGHT ........................................................................................................1-14
SOLUTIONCONTROL ......................................................................................................................1-14
DETERGENTFLOWKNOB..............................................................................................................1-14
TURNSIGNAL(OPTION) ..................................................................................................................1-15
THROTTLE .......................................................................................................................................1-15
CHOKE ............................................................................................................................................1-15
PARKINGBRAKE ............................................................................................................................1-15
FOOTBRAKE .................................................................................................................................. 1-16
ACCELERATOR&DIRECTIONALCONTROLPEDAL ...................................................................... 1-16
BACKUPALARMSWITCH ...............................................................................................................1-16
SEATADJUSTMENT ........................................................................................................................1-17
ESPSYSTEMOPERATINGINSTRUCTIONS .........................................................................................1-17
ESPRECYCLINGSYSTEMON/OFFSWITCH ................................................................................1-17
HIGHLEVEL WARNINGLIGHT ........................................................................................................1-17
NON-RECYCLINGSCRUBBINGSYSTEM-HOWITWORKS ......................................................... 1-17
OPERATINGMODE INSTRUCTIONS ......................................................................................................1-18
NORMAL,HIGHCAPACITY, ESP.....................................................................................................1-18
OPERATINGINSTRUCTIONS .................................................................................................................1-20
FILLINGTANK1-NON-RECYCLING(STANDARD) ..........................................................................1-20
FILLINGTANK 1 - HIGH CAPACITYor ESP ..................................................................................... 1-20
PRE-STARTCHECKLIST.................................................................................................................. 1-20
BEFORESTARTINGTHEENGINE...................................................................................................1-20
STARTINGTHEENGINE ..................................................................................................................1-20
POSTSTARTCHECKLIST ...............................................................................................................1-21
TRANSPORTINGTHEMACHINE .....................................................................................................1-21
BEGINNINGTHECLEANINGOPERATION....................................................................................... 1-21
ENDINGTHECLEANINGOPERATION ............................................................................................1-21
POSTOPERATIONCHECKLIST ...................................................................................................... 1-21
DRAININGTANK1............................................................................................................................1-22
CLEANINGTANK1 ..........................................................................................................................1-22
DRAININGTANKS 2 & 3...................................................................................................................1-22
CLEANINGTANKS 2& 3..................................................................................................................1-22
DOUBLELIDTANK3 .......................................................................................................................1-22
TOWINGINSTRUCTIONS .................................................................................................................1-23

1-2 American-Lincoln®
SR7770HCOperator’sManual
TABLE OF CONTENTS
SERVICECHART ...................................................................................................................................1-24
HELPFULHINTSFORCLEANINGOPERATION .....................................................................................1-26
GENERALMACHINE MAINTENANCE.................................................................................................... 1-27
LUBRICATION .................................................................................................................................. 1-27
OPENINGTHEENGINE COVER...................................................................................................... 1-27
HYDRAULICS ...................................................................................................................................1-28
FILLINGTHEHYDRAULICRESERVOIR ..........................................................................................1-28
CLEANINGTHE HYDRAULICSYSTEM ...........................................................................................1-28
REPLACINGTHERETURNFILTERELEMENT ................................................................................1-28
RECYCLINGPUMPESP SYSTEM..................................................................................................1-29
ESPSYSTEM STORAGE ................................................................................................................ 1-29
RECOVERYTANK LIDACCESS...................................................................................................... 1-29
REARSQUEEGEE ..........................................................................................................................1-29
SQUEEGEECASTERWHEELS......................................................................................................1-29
CASTERWHEELADJUSTMENT......................................................................................................1-29
BRAKE ADJUSTMENT ....................................................................................................................1-30
AIRINTAKE SYSTEM ......................................................................................................................1-31
AIRFILTER....................................................................................................................................... 1-31
REPLACINGTHEAIRFILTER .......................................................................................................... 1-31
REMOVINGTHEAIR FILTER ELEMENT .......................................................................................... 1-32
CLEANINGTHEAIR FILTERELEMENT ...........................................................................................1-32
INSPECTINGTHEAIRFILTER ELEMENT ........................................................................................ 1-32
COOLINGSYSTEM..........................................................................................................................1-33
COOLANTLEVEL ............................................................................................................................ 1-33
RADIATOR........................................................................................................................................1-33
DRIVEBELTS ..................................................................................................................................1-33
BATTERY .........................................................................................................................................1-34
GASTANK .......................................................................................................................................1-34
LP GAS SYSTEM ............................................................................................................................1-35
LPGASVAPORIZER-REGULATORQUICKCHECK ........................................................................1-35
LP GAS FUEL TANK ........................................................................................................................1-35
NEUTRALADJUSTMENT .................................................................................................................1-35
PARTSLISTLEGEND.............................................................................................................................1-36
GENERALTROUBLESHOOTING ...........................................................................................................1-37
ORDERINGPARTS................................................................................................................................. 1-39
TABLEOFCONTENTS-CHAPTERTWO .............................................................................................. 2-1
FRONTTANK .........................................................................................................................................2-2
SCRUBDECK60” ..................................................................................................................................2-4
SCRUBDECKLIFT................................................................................................................................. 2-6
TRANSFERPUMP ................................................................................................................................. 2-7
RECOVERYTRANSFER ........................................................................................................................ 2-8
LOWERDOORSGROUP .......................................................................................................................2-9
REARAND SIDESQUEEGEES ............................................................................................................. 2-10
SQUEEGEELIFT.................................................................................................................................... 2-12
SWINGSQUEEGEESUPPORT............................................................................................................. 2-14
SOLUTIONTANK .................................................................................................................................... 2-16
SOLUTIONCONTROLGROUP ............................................................................................................... 2-18
RECOVERYTANKLID ........................................................................................................................... 2-20
VACUUMMOTOR&FLOAT ...................................................................................................................2-22
RECOVERYTANK .................................................................................................................................2-24
FRONTBUMPER GROUP ......................................................................................................................2-26
FRONTWHEELAND BRAKE.................................................................................................................2-27
REARWHEEL........................................................................................................................................2-28
BRAKELINKAGE ...................................................................................................................................2-30
FOR/REVCONTROL– FORD.................................................................................................................2-32

American-Lincoln®1-3
SR7770HCOperator’sManual
TABLE OF CONTENTS
MAINFRAME .........................................................................................................................................2-34
DRIVERCOMPARTMENT.......................................................................................................................2-36
CONSOLEGROUP................................................................................................................................. 2-38
INSTRUMENTPANEL (GAS) ..................................................................................................................2-40
INSTRUMENTPANEL(LP) ..................................................................................................................... 2-42
SQUEEGEE,SCRUBDECK,STEERING CYLINDERSANDFITTINGS ..................................................2-44
REARWHEELMOTORSAND FITTINGS................................................................................................2-45
HYDRAULICRESERVOIR,FILTER,AND FITTINGS................................................................................2-46
DRIVEPUMPANDFITTINGS .................................................................................................................2-48
VACUUMMOTOR&OILCOOLER .........................................................................................................2-49
POWERSTEERINGUNITANDFITTINGS...............................................................................................2-50
RETURNMANIFOLDANDFITTINGS ......................................................................................................2-51
MAINCONTROLVALVE&FITTINGS .....................................................................................................2-52
AUXILIARYPUMPANDFITTINGS - FORD ............................................................................................2-53
HYDRAULICHOSESYSTEM .................................................................................................................2-54
BATTERY................................................................................................................................................2-58
ENGINECOVER.....................................................................................................................................2-60
FUELTANK ............................................................................................................................................2-62
LPTANK.................................................................................................................................................2-64
FORDGASENGINE...............................................................................................................................2-66
FORDLPENGINE .................................................................................................................................. 2-70
RADIATORANDSHROUD ......................................................................................................................2-74
DECALS .................................................................................................................................................2-76
NOTES ..................................................................................................................................................2-78
CONNECTIONDIAGRAM, GASCONTROL PANEL ................................................................................2-79
CONNECTIONDIAGRAM, LPCONTROLPANEL ...................................................................................2-80
CONNECTIONDIAGRAM,ENGINE ELECTRICAL (GAS &LP)............................................................... 2-81
ELECTRICALSCHEMATIC ..................................................................................................................... 2-82
ELECTRICALSCHEMATIC(CON’T) ........................................................................................................2-83
ELECTRICALSCHEMATIC(CON’T) ........................................................................................................2-84
HYDRAULICSCHEMATIC.......................................................................................................................2-85
TABLEOFCONTENTS-CHAPTER3 ....................................................................................................3-1
OVERHEADGUARD OPTION ................................................................................................................ 3-2
BRUSHOPTIONS ...................................................................................................................................3-3
BUMPER OPTION ................................................................................................................................. 3-4
BUMPER ASSEMBLY ...........................................................................................................................3-5
BACK-UPALARM...................................................................................................................................3-6
VACUUMWANDOPTION ...................................................................................................................... 3-7
LIGHTSOPTIONS ...................................................................................................................................3-8
TURNSIGNALOPTION ..........................................................................................................................3-10
WARNINGLIGHTS(STANDARD)............................................................................................................3-12
WARNINGLIGHTS WITHOVERHEADGUARD......................................................................................3-14
FIREEXTINGUISHEROPTION ............................................................................................................... 3-16
FLAMEARRESTING GASCAPOPTION ................................................................................................ 3-17
SUSPENSIONSEAT .............................................................................................................................. 3-18
DEBRISBASKETOPTION .....................................................................................................................3-19
ESPOPTION ..........................................................................................................................................3-20
FORDENGINESHUTDOWNOPTION ....................................................................................................3-24
TIREOPTIONS ....................................................................................................................................... 3-26
SPARE PARTS KIT, GAS/LP..................................................................................................................3-27
INDEX ..................................................................................................................................................3-28
WARRANTY ...........................................................................................................................................3-33

1-4 American-Lincoln®
SR7770HCOperator’sManual
SPECIFICATIONS
DIMENSIONS
Length 107.0Inches - 271.8Cm.
Width 59.0 Inches - 149.9 Cm.
Height 61.5 Inches - 156.2 Cm.
Wheel Base 56.4 Inches - 143.2 Cm.
HeightwithGuard 85.5 Inches - 217.2 Cm.
DRIVESPropelling VariableDisplacementPump- Hydraulic Drive Motor
Scrubbing (3)HydraulicMotors
Vacuum - Water Pick Up (1)HydraulicMotor
HYDRAULICCONTROL
SingleFootPedal Controls Forward, Neutral,Reverse & DynamicBraking.
AllElectro-Hydraulic ControlsToBothSweepingAndScrubbingFunctions.
MECHANICALSYSTEM
Steering PowerSteering withRack and PinionGear.
Brakes Parking/FootOperated and LockedDisc Brakes
Brooms Lift and HeightAdjustment
BRUSHES & SQUEEGEE
Brush (3)20Inch (50.8Cm.) Diameter Poly-FiberDiscs
Squeegees (1)65Inch(165.10Cm.)WideContouredRearSwingSqueegee
(2)29 Inch (73.7 Cm.)Floating SideSqueegees, OneOn Either
SideOftheScrubbing Compartment
TANKCAPACITY(Standard) 200Gallon(757.00 Liters) SolutionTank
200Gallon(757.00Liters)RecoveryTank
HighCapacityRecovery 0GallonSolutionTank
400Gallon(1514zliters)RecoveryTank
TANK CAPACITY(ESPSystem) Interconnected Tanks ProvideATotal ESPl System Capacity
Of390 Gallons (1476.15Liters)Along With 5Gallons (18.9Liters) Of
Detergent.
FUELSYSTEM
EngineCooling System Radiator and Hoses(Approximately) 3 Quarts(2.8 Liters)
Gas/LP System Total 6.75 Quarts - 6.4 Liters
Gas, Diesel Fuel Tank 9.7 Gallons - 36.71 Liters
LPG Tank 33 Pounds
Engine Oil System
Gas and LPG 4 Quarts - 3.8 Liters
Hydraulic System
Total System 11 Gallons - 41.6 Liters
SPEEDS
Maximum Travel 7 Mph - 11.3 Km./Hr.
Recommended Maximum
Scrubbing Speed 4.0 Mph - 6.4 Km./Hr.

American-Lincoln®1-5
SR7770HCOperator’sManual
SPECIFICATIONS
TURNINGRADIUS
Left 82 Inches - 208.3 Cm.
Right 82 Inches - 208.3 Cm.
MinimumAisle Width for 180° Turn
120 Inches - 305 Cm.
ScrubbingWidth 60" Inches (227.10 Cm.)Provided By (3)20 Inch (50.8Cm.)
DiameterDisc Brushes
WEIGHTS
7770 ManualDump
Net 4150 Lb. - 1882 Kg. / 3700 Lb. - 1678 Kg.
Shipping W/Crate 4600 Lb. - 2087 Kg./ 4150 Lb. - 1882 Kg.
ENGINEDATA
FordLRG-425
BoreAnd Stroke 3.78X 3.126 In.- 9.60X 7.94Cm.
Oil Capacity 4 Quarts - 3.8 Liters
Displacement 4 Cylinders - 2.3 Liters (140 Cid)
Fuel “Regular”Unleaded Gasoline

1-6 American-Lincoln®
SR7770HCOperator’sManual
85.5"
217.2 cm.
61.5"
156.2 cm.
54.5"
138.4 cm.
56.4"
143.2 cm.
107"
271.8 cm.
27.0"
68.6 cm.
27.4"
69.5 cm.
27.4"
69.5 cm.
59.0"
149.9 cm.
MACHINE DIMENSIONS

American-Lincoln®1-7
SR7770HCOperator’sManual
STANDARD HARDWARE & TORQUE VALUES
SAE - Grade 5 SAE - Grade 8
Screw
Size
Grade
5
Plated
Grade
8
Plated
410H
Stainless
Brass Type
F&T
&BT
Type
B, AB
*6
*8
*10
*1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
14
27
39
86
15
28
44
68
98
135
239
387
579
15
28
43
108
17
31
49
76
110
153
267
-
-
-
-
-
130
22
40
63
95
138
191
338
545
818
-
-
-
151
24
44
70
108
155
216
378
-
-
18
33
47
114
19
34
55
85
-
-
-
-
-
20
35
54
132
22
39
62
95
-
-
-
-
-
5
9
13
32
6
10
16
-
-
-
-
-
-
20
37
49
120
-
-
-
-
-
-
-
-
-
23
41
64
156
-
-
-
-
-
-
-
-
-
21
34
49
120
-
-
-
-
-
-
-
-
-
C
CCC
FFF F
C = Coarse Thread
F = Fine Thread
* = Torque values for #6 through 1/4 are lb./in. All others are lb./ft.
NOTE
Decrease the torque by 20% when using thread lubricant
The torque tolerance is ± on torque values.
C2000/9905

1-8 American-Lincoln®
SR7770HCOperator’sManual
HYDRAULIC TORQUE REQUIREMENTS
HYDRAULIC TORQUE REQUIREMENTS
Refer to the following chart for torque values on all hydraulic hoses and fittings.
Nominal O-Ring Face Seal End SAE O-Ring Boss End
SAE Thread Swivel Thread Str. Fitting
Dash Size Nut Size or Locknut
Size Inch Torque Inch Torque
LB-FT LB-FT
-3 * * 3/8-24 8-10
-4 9/16-18 10-12 7-16-20 14-16
-5 * * 1/2-20 18-20
-6 11/16-16 18-20 9/16-18 24-25
-8 13/16-16 32-35 3/4-16 50-60
-10 1-14 46-50 7/8-14 72-80
-12 1 3/16-12 65-70 1 1/16-12 125-135
-14 1 3/16-12 65-70 1 3/16-12 160-180
-16 1 7-16-12 92-100 1 5/16-12 200-220
-20 1 11/16-12 125-140 1 5/8-12 210-280
-24 2-12 150-165 1 7/8-12 270-360
* O-Ring face seal type end not defined for this tube size.
NOTE
Parts must be lightly oiled with hydraulic fluid.
C-2002

American-Lincoln®1-9
SR7770HCOperator’sManual
DECIMAL-METRIC CONVERSION TABLE
DECIMAL-METRIC CONVERSION TABLE
Fraction Decimal Millimeter Fraction Decimal Millimeter
1 0.015625 0.3969 33 0.515625 13.0969
64 64
1 0.03125 0.7938 17 0.53125 13.4938
32 32
3 0.046875 1.1906 35 0.546875 13.8906
64 64
1 0.0625 1.5875 9 0.5625 14.2875
16 16
5 0.078125 1.9844 37 0.578125 14.6844
64 64
3 0.09375 2.3813 19 0.59375 15.0813
32 32
7 0.109375 2.7781 39 0.609375 15.4781
64 64
1 0.125 3.1750 5 0.625 15.8750
8 8
9 0.140625 3.5719 41 0.640625 16.2719
64 64
5 0.15625 3.9688 21 0.65625 16.6688
32 32
11 0.171875 4.3656 43 0.671875 17.0656
64 64
3 0.1875 4.7625 11 0.6875 17.4625
16 16
13 0.203125 5.1594 45 0.703125 17.8594
64 64
7 0.21875 5.5563 23 0.71875 18.2563
32 32
15 0.234375 5.9531 47 0.734375 18.6531
64 64
1 0.25 6.3500 3 0.75 19.0500
4 4
17 0.265625 6.7469 49 0.765625 19.4469
64 64
9 0.28125 7.1438 25 0.78125 19.8438
32 32
19 0.296875 7.5406 51 0.796875 20.2406
64 64
5 0.3125 7.9375 13 0.8125 20.6375
16 16
21 0.328125 8.3344 53 0.828125 21.0344
64 64
11 0.34375 8.7313 27 0.84375 21.4313
32 32
23 0.359375 9.1281 55 0.859375 21.8281
64 64
3 0.375 9.5250 7 0.875 22.2250
8 8
25 0.390625 9.9219 57 0.890625 22.6219
64 64
13 0.40625 10.3188 29 0.90625 23.0188
32 32
27 0.421875 10.7156 59 0.921875 23.4156
64 64
7 0.4375 11.1125 15 0.9375 23.8125
16 16
29 0.453125 11.5094 61 0.953125 24.2094
64 64
15 0.46875 11.9063 31 0.96875 24.6063
32 32
31 0.484375 12.3031 63 0.984375 25.0031
64 64
1 0.5 12.7000 1 1.0000 25.4000
2
C-2001

1-10 American-Lincoln®
SR7770HCOperator’sManual
MACHINE OPERATION
YOURSR7770HCMACHINE HAS BEEN SHIPPED COMPLETE,BUTDONOTATTEMPT TO OPERATEWITH-
OUTFOLLOWINGTHESEINSTRUCTIONS.
PREPARINGTHEMACHINE FOR OPERATION
1. Connectandtighten battery cables.
2. Fill the tank with REGULAR GRADE gasoline.
WARNING
Never fill tank while engine is running. Always be sure gasoline container and sweeper are electri-
cally connected before pouring gasoline. This can easily be done by providing an insulated wire
(permanently attached to container) with battery clip on the other end.
3. Check engine crankcaseoil level.Although properly lubricatedat factory,checkbeforestarting engine.No
special break in oil is used and recommended number of operating hours before the initial oil change is the
sameas normal. SeeMaintenance.
4. Checkradiator coolant level. Permanenttype antifreezeis addedat the factoryto provideprotection to
approximately -35° F (37° C). To retain this protection level, always add 1/2 part water to 1/2 part anti
freeze.
5. Checkoillevel in thehydraulic reservoirlocated atcenter ofmachine besidethe engine.Oil filllevel should
be two (2) inches (5 cm.) below filler neck assembly. If oil is required, add HYDRAULIC FLUID ONLY,
automatictransmission fluid FORD type“F”.Afterthefirst 50 operating hours,service mustbe performed
onyourengine to insure future highperformance and trouble freeoperation. See Maintenance.

American-Lincoln®1-11
SR7770HCOperator’sManual
SAFETY INSTRUCTIONS
WARNING
FOR SAFETY, OBSERVE THE FOLLOWING WARNINGS. FAILURE TO COMPLY MAY CREATE ASERIOUS
RISKOFINJURYTOYOUANDOTHERS.THISMACHINE SHOULD NOT BE USED IN HAZARDOUS LOCA-
TIONSINCLUDINGAREASOF VOLATILE DUST OR VAPOR CONCENTRATIONS.
Operators must be trained and qualified to operate this machine. They must also understand the
operator’s manual before starting.
Use caution when mounting or dismounting the machine particularly on wet slippery surfaces.
Operate only from the designated operator’s position. Stay inside the body of the machine. Keep
hands and feet on the designated controls. Always operate in well-lit areas.
Exhibit extreme caution when negotiating, turning and traveling across grades or ramps.
Start, stop, change direction, travel and brake smoothly. Slow down when turning. Avoid uneven
surfaces and loose materials.
Watch out for obstructions, especially overhead.
Do not carry passengers on the machine.
Set parking brake when leaving the machine. Chock (block) the wheels if the machine is to be parked
on a grade (ramp), or when working on it.
Never leave the operator’s seat with the engine running.
Report damage or faulty operation immediately. Do not operate the machine until repairs have been
completed.

1-12 American-Lincoln®
SR7770HCOperator’sManual
American-Lincoln
Fuse Acces
LIGHT SWITCH
IGNITION
1
2
IGNITION SWITCH
Thekeyedignitionswitchis located to the right ofthe steering column on the front faceof the instrument console.
It has four positions.
1. The key turned to the center “OFF” position will shut off the engine. The following items can be activated in
the“OFF” position.
(A.)Horn
(B.)Light Options
2. The key turned to the left “ACCESSORY” position will allow the following additional items to be activated:
(A.)TurnSignals
(B.)InstrumentGauges
3. The key turned to the right “IGN/ON” position will allow all the items listed above to be activated.
This position will not start the engine.
4. The key turned to the far right “START” position will start the engine. This position is a momentary position.
Thekey will revertto the“IGN/ON”position when itis released.
LIGHT SWITCH
Thelightswitch is located asshown. It willwork various lightoptions that areavailable for thismachine, such as:
* HEAD LIGHTS
* TAILLIGHTS
* INSTRUMENTLIGHTS
HORNPUSH BUTTON
The horn button is located to the right of the steering column on the front face of instrument console. The horn
button is always active. Push the horn button to sound the horn.
OPERATIONS OF CONTROLS AND GAUGES

American-Lincoln®1-13
SR7770HCOperator’sManual
OPERATIONS OF CONTROLS AND GAUGES
American-Lincoln
Fuse Access
LIGHT SWITCH
1
2
OIL
PRESSURE
HORN
VOLTAGE
METER
WATER
TEMPERATURE
FUEL HOUR METER
SQUEEGEE
SWITCH
WATER
TEMPERATURE
VOLTAGE
OIL PRESSURE
HOURS
FUEL
1
3
2
2
1
ESP SWITCH
ENGINE SPEED
SWITCH
SCRUB BRUSH
ROTATION
SCRUB DECK
SOLUTION
HIGH/LOW
RECOVERY
HIGH/LOW
OPERATING
MODE
ENGINE FAULT
LIGHT
DETERGENT
FLOW
SOLUTION
FLOW
IGNITION
CHECKENGINE (WARNING LIGHTOPTION)
Thisenginehasalowoilpressure and high water temperature shutdown. If the engine oil pressure srops toolow
orthewater temperature goes too high,the engine will shutdown.Addengineoiluntilthe oil is broughtup to the
correct level, or wait for engine to cool down, then check coolant level.
WATERTEMPERATUREGAUGE
TheWaterTemperatureGauge islocatedontheconsolepanelabovethesteeringwheel in thegaugecluster.The
gauge is mechanical and activated by a sender in the engine. It displays the engine coolant temperature in
fahrenheit.
HOURMETER
The Hour Meter is located on the console panel above the steering wheel in the gauge cluster. This meter is
activated when the key switch is in the “ignition” position. The meter indicates actual “run” time of the machine.
The meter is used to indicate when maintenance should be done to the machine.
FUEL GAUGE/LOW LP LIGHT
TheFuelGauge/LowLPLightislocatedontheconsolepanelabovethesteeringwheelinthegaugecluster.This
gauge indicates the level of fuel contained in the fuel tank. The low LP light indicates low LP pressure at the
engine.
OILPRESSURE GAUGE
TheOilPressure Gauge islocatedontheconsolepanelabovethesteeringwheel in thegaugecluster.Thegauge
is mechanical and activated by a sender in the engine. It displays the engine oil pressure in PSI.
VOLT METER
The Volt Meter is located on the console panel above the steering wheel in the gauge cluster. The gauge indi-
cates the charging or discharging of the battery.
BRUSHROTATION SWITCH
The Brush Rotation Switch is located on the console as shown. This switch reverses the rotation of the scrub
brushes. This switch has two positions “NORMAL” and “REVERSED”. This switch can not be activated unless
the Scrub Brush Lift Switch is in the “LOWER” position.

1-14 American-Lincoln®
SR7770HCOperator’sManual
OPERATIONS OF CONTROLS AND GAUGES
SCRUBDECK SWITCH
The Scrub Deck Switch is located on the console as shown. This switch raises and lowers the scrub deck. This
switch has three (3) positions which are rasied, “NORMAL” and “HEAVY”.
SQUEEGEEBLADE SWITCH
The Squeegee Blade Switch is located on the console as shown. This switch in the squeegee down position will
lower the squeegee and activate the squeegee vacuum. This switch in the squeegee up position will stop the
squeegeevacuumand raise the squeegee.Aswitchactivatedbytheforward-reverse foot pedal will automatically
raise the squeegee if it is in the lowered position and the machine is in reverse.
OPERATING MODE SWITCH
The Operating Mode Switch is located on the console as shown. The switch control whether the machine is to
operate in normal or high capacity mode. In the off position, “NORMAL” mode, solution is despensed from the
Tank 1 and recovered solution is collected in tanks 2 and 3. In the lower position, “HIGH CAPACITY” mode, no
solution is dispensed and all three(3) tanks are used to recover solution.
HIGH LEVEL WARNING LIGHTS TANK1 / TANK2 / TANK3
The High Level Warning Lights are located on the console as shown. The Tank3 warning light will illuminate
approximately 5 minutes before the tanks are full, giving ample time to complete the scrubbing cycle before the
mechanicalfloat shutsoffthe vacuum to tank3.Thehigh level warning lightsforTank 1and Tank 2 are indicators
only.
LOW LEVEL WARNING LIGHTS TANK 1 / TANK 2
TheLow Level WarningLightsare located onthe consoleasshown. The Low LevelWarning Lightwillilluminate
whenTank1orTank2are low, respectively.
SOLUTIONCONTROL
Toapplysolutiontothe scrubbing brushes, turn the solutionflow knob clockwise. The solution rateis continuously
variable from off to approximately 1-3/4 GPM at low and 3-1/2 GPM at high. The low level warning light will
illuminate when the tank is empty, marking the end of the scrubbing cycle.
DETERGENTFLOWKNOB (ESP OPTION)
This rotary knob controls the detergent flow into the scrubbing solution. The operator may choose from any
detergentsetting, for light toheavy cleaningapplications.
American-Lincoln
Fuse Access
LIGHT SWITCH
1
2
OIL
PRESSURE
HORN
VOLTAGE
METER
WATER
TEMPERATURE
FUEL HOUR METER
SQUEEGEE
SWITCH
WATER
TEMPERATURE
VOLTAGE OIL PRESSURE
HOURS
FUEL
1
3
2
2
1
ESP SWITCH
ENGINE SPEED
SWITCH
SCRUB BRUSH
ROTATION
SCRUB DECK
SOLUTION
HIGH/LOW
RECOVERY
HIGH/LOW
OPERATING
MODE
ENGINE FAULT
LIGHT
DETERGENT
FLOW
SOLUTION
FLOW
IGNITION
TANKS1&2
LOWSOLUTION&
HIGHRECOVERY
TANK3
HIGHRECOVERY

American-Lincoln®1-15
SR7770HCOperator’sManual
OPERATIONS OF CONTROLS AND GAUGES
TURN SIGNAL - 4 Way (Option)
Theturnsignaloptionis located on the steering columnand works as automotive turnsignals work, forward on the
leverfor right and backon thelever for left.The 4-wayflasher will activatewhen theturn signal leveris pulledout.
ENGINESPEED CONTROL
Theenginespeed control located asshown. Theenginemustbeoperatingatfull governed speed of2150“noload”
RPM. Before turning off the key and stopping the engine, moveswitch to the low position.
CHOKE
LP poweredengines do not havea choke. Thechoke islocated to theleft of theengine speedcontrol. The choke
governsthemixtureofairand fuel during the combustion cycle of the engine operation.Thechokeshouldbepulled
out during the start of the engine and then gradually pushed back in after the engine is warm.
PARKINGBRAKE
The parking brake lever is located in the left side of the driver compartment floor. This lever when raised to the
upright position will “lock” the foot brake pedal in the down position.

1-16 American-Lincoln®
SR7770HCOperator’sManual
REVERSE
FORWARD
OPERATIONS OF CONTROLS AND GAUGES
FOOTBRAKE
Thefoot brake pedalis located tothe rightofthe steering columnonthe floor ofthedriver compartment. Thefoot
brake on front wheels is a mechanical system actuated by the brake pedal.
ACCELERATOR&DIRECTIONALCONTROLPEDAL
The accelerator and directional control pedal is located on the floor of the driver compartment, to the right of the
brakepedal. The accelerator and directionalcontrol pedal controlsthe machinedirection and travelspeed.
1. Putfootpressure on the upperportion of thepedal. The machine willmove forward.
2. Increasethe foot pressure onthe upper portionof thepedal to increasethe forward speed.
3. Putfoot pressure on thelower portion ofthe pedal. Themachine willmove in reverse.
4. Increasethe foot pressure onthe lower portionof thepedal to increasethe reversespeed.
5. To stop the machine, put light foot pressure on the opposite end of the accelerator and directional control
pedal.If the machine ismoving forwardput lightfoot pressureon the lowerportion ofthe pedal.If the
machineis moving in reverseput lightfoot pressure onthe upperportion of thepedal.
BACKUPALARMSWITCH
Aswitchthat is locatedunder thelowersection of theAccelerator and directionalcontrolpedal operates theback
upalarm. The alarm makesa loudaudible noise whenthe machineis being drivenin reverse.
SEATADJUSTMENT
Thisleverislocatedontherightofthe seat. This lever allows the seat to be adjusted forward or back when thelever
ismoved.
LOCKED
POSITION
PARKING
BRAKE

American-Lincoln®1-17
SR7770HCOperator’sManual
1
2
ESP SWITCH
ESP SYSTEM OPERATING INSTRUCTIONS
THEESPRECYCLING SYSTEM OFF/ON-SELECT SWITCH
This switch turns the ESP recycling system on and off,selecting recycle to Tank1 or Tank2.
SOLUTION HIGH WARNING LIGHT
Thereare two scrubbingsystems availablefor theSR7770HCmachine, the non-recycling orstandardscrubbing
system and the recycling or ESP scrubbing system.
THENON-RECYCLINGORSTANDARD SCRUBBING SYSTEM - HOW IT WORKS
Duringthe scrubbing process, detergentsolution waterfrom tank1is fedto thescrub deck line. Wherethree disc
scrubbing brushes work to dislodge soil.

1-18 American-Lincoln®
SR7770HCOperator’sManual
OPERATING MODE INSTRUCTIONS
TANK 3
TANK 3
TANK 2
TANK 1
DETERGEN
T
TANK
BAFFLE
NON-RECYCLING RECYCLING
TANK 1
TANK 2
P4795A/0403
S
OLUTION
LINE
TANK 1
TANK 3
TANK 2
VACUUM
SCRUBBING
BRUSHES
P4753A/0403