American-Lincoln SC7740 Installation and operation manual

READ THIS BOOK
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: American-Lincoln, 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. 2-86-00299 2002 Printed in the
®
American-Lincoln USA
®
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Operator's
Manual &
Parts List
SC7740
Sweeper/
Scrubber
Before Serial Number 691147
American-Lincoln
®

American-Lincoln®1-1
SC7740
Specifications .......................................................................................................................................... 1-4
Machine Dimensions ............................................................................................................................... 1-7
Standard Hardware & Torque Values .................................................................................................... 1-8
Hydraulic Torque Requirements............................................................................................................. 1-9
Decimal - Metric Conversion Table ........................................................................................................ 1-10
Machine Preparation............................................................................................................................... 1-11
Preparing The Machine For Operation ................................................................................................. 1-11
Safety Instructions .............................................................................................................................. 1-12
Operations of Controls and Gauges ....................................................................................................... 1-15
Left Side Console .................................................................................................................................... 1-15
Light Switch ........................................................................................................................................ 1-15
Dust Control/Filter Shaker Switch........................................................................................................ 1-15
Main Broom/Side BroomSwitch........................................................................................................... 1-15
Scrub Deck Switch.............................................................................................................................. 1-15
Engine Speed Switch .......................................................................................................................... 1-16
Squeegee/Vac Switch ......................................................................................................................... 1-16
Hopper Switch..................................................................................................................................... 1-16
ESP Switch (Optional) ........................................................................................................................ 1-16
Key Switch.......................................................................................................................................... 1-17
Hour Meter .......................................................................................................................................... 1-17
Fuel Gauge/LP Indicator Light ............................................................................................................. 1-17
Back-UPAlarm Switch (Option)........................................................................................................... 1-17
Solution Control Knob.......................................................................................................................... 1-17
Warning Bank ..................................................................................................................................... 1-18
Engine Temp Light............................................................................................................................... 1-18
Engine Oil Pressure Light.................................................................................................................... 1-18
Charging System Light ........................................................................................................................ 1-18
High Recovery Light ............................................................................................................................ 1-18
Low Solution Light ............................................................................................................................... 1-18
Hopper SafetyArm .............................................................................................................................. 1-19
--To Engage SafetyArm....................................................................................................................... 1-19
Seat Position Adjustment .................................................................................................................... 1-19
Directional Control Pedal ..................................................................................................................... 1-19
Hydraulic Reservoir Level Sight Gauge ................................................................................................ 1-20
Horn Button......................................................................................................................................... 1-20
Choke ................................................................................................................................................. 1-20
Operating Instructions ............................................................................................................................. 1-21
Pre-Start Checklist .............................................................................................................................. 1-21
Starting Gas Machines ........................................................................................................................ 1-21
Starting LP Machines .......................................................................................................................... 1-21
Post-Operation Checklist .................................................................................................................... 1-21
Service Chart ........................................................................................................................................... 1-22
Helpful Hints For Cleaning Operation.................................................................................................... 1-24
Service Precautions ................................................................................................................................ 1-25
Service Instructions ................................................................................................................................. 1-26
Main Broom......................................................................................................................................... 1-26
Main Broom Height,Adjusting The....................................................................................................... 1-26
Main Broom Access Door.................................................................................................................... 1-26
Replacing The Main Broom.................................................................................................................. 1-26
Side Broom ......................................................................................................................................... 1-27
Side Broom Height, Adjusting The ....................................................................................................... 1-27
Replacing The Side Broom .................................................................................................................. 1-27
Hopper ................................................................................................................................................ 1-28
Hopper, Cleaning The .......................................................................................................................... 1-28
Hopper Switch, Adjusting The .............................................................................................................. 1-28
Dust Control Filter ............................................................................................................................... 1-28
Dust Control Filter, Checking The ........................................................................................................ 1-28
Cleaning the Dust Control Filter........................................................................................................... 1-28
Replacing the Dust Control Filter ......................................................................................................... 1-28
Dust Flaps .......................................................................................................................................... 1-29
TABLE OF CONTENTS

1-2 American-Lincoln®
SC7740
Dust Flaps, Checking The ................................................................................................................... 1-29
Dust Flaps, Adjusting The ................................................................................................................... 1-29
NeutralAdjustment..................................................................................................................................... 1-30
Parking Brakes ................................................................................................................................... 1-30
Adjusting the Parking Brake Pedal ...................................................................................................... 1-30
Adjusting the Parking Brake ................................................................................................................ 1-30
Adjusting the Directional Pedal............................................................................................................ 1-30
General Machine Maintenance ................................................................................................................... 1-31
Replacing the Scrub Brush.................................................................................................................. 1-31
Covers and Latches............................................................................................................................. 1-31
Low Solution Warning Light ................................................................................................................. 1-31
High Recovery Light ............................................................................................................................ 1-31
Solution Control................................................................................................................................... 1-31
Recycling Pump ESP System ............................................................................................................ 1-32
Recycling Pump Storage ..................................................................................................................... 1-32
Rear Squeegee ................................................................................................................................... 1-32
Squeegee Caster Wheels.................................................................................................................... 1-32
Casters,Adjusting The ........................................................................................................................ 1-32
Emptying The Recovery Tank .............................................................................................................. 1-33
Machine Storage ................................................................................................................................. 1-33
Checking Engine Oil Level................................................................................................................... 1-34
Checking Engine OIl............................................................................................................................ 1-34
Fan Belt Tension ................................................................................................................................. 1-34
Checking Spark Plugs ......................................................................................................................... 1-34
Drive Belt Tension Adjustment ............................................................................................................. 1-34
Cleaning/Changine the Fuel Filter ........................................................................................................ 1-35
Checking the Fuel Hoses .................................................................................................................... 1-35
Valve Clearance.................................................................................................................................. 1-35
Air Cleaner .......................................................................................................................................... 1-35
Checking Water Level.......................................................................................................................... 1-36
Draining and Cleaning the Radiator...................................................................................................... 1-36
LP Gas System ......................................................................................................................................... 1-37
LP Gas Vaporizer-Regulator Qick Check ............................................................................................. 1-37
LP Gas Fuel Tank ............................................................................................................................... 1-37
LP Liquid Withdrawal System ............................................................................................................. 1-37
Safety Warnings LP ................................................................................................................................... 1-38
LP Tank Components .......................................................................................................................... 1-39
LP Checklist ....................................................................................................................................... 1-39
LP Fuel Tank ....................................................................................................................................... 1-39
Use and Care of LP Tank..................................................................................................................... 1-40
Changing LP Tank ............................................................................................................................... 1-40
Storing LP Fuel Tanks ......................................................................................................................... 1-40
ESP System Operating Instructions........................................................................................................... 1-41
Scrubbing System - How It Works....................................................................................................... 1-41
Non-Recycling Or Standard Scrubbing System - How It Works ........................................................... 1-41
ESP Recycling ON/OFF Switch (Option)............................................................................................. 1-41
Recovery Or ESP System - How It Works........................................................................................... 1-41
General Troubleshooting............................................................................................................................. 1-42
Parts List Legend....................................................................................................................................... 1-44
Ordering Parts............................................................................................................................................ 1-45
Chapter 2 (Parts List)
Main Frame & Flaps............................................................................................................................ 2-2
Main Frame & Flaps Cont. .................................................................................................................. 2-4
Cover-Hopper/Engine ........................................................................................................................... 2-6
Drive WheelAssembly ........................................................................................................................ 2-8
Front Wheel ........................................................................................................................................ 2-10
Parking Brake ..................................................................................................................................... 2-12
Swing Squeegee Support .................................................................................................................... 2-14
Squeegee Lift ...................................................................................................................................... 2-16
Rear Squeegee (40”) ........................................................................................................................... 2-18
TABLE OF CONTENTS

American-Lincoln®1-3
SC7740
TABLE OF CONTENTS
Rear Squeegee (46”) ........................................................................................................................... 2-20
Side Squeegee (40”)............................................................................................................................ 2-22
Side Squeegee (46”)............................................................................................................................ 2-23
Solution Vac........................................................................................................................................ 2-24
Main Broom Lift Assembly................................................................................................................... 2-26
Main Broom Assembly Cont................................................................................................................ 2-28
Side Broom Assembly......................................................................................................................... 2-30
Side Broom LIftAssembly ................................................................................................................... 2-32
Hopper (Low Dump)............................................................................................................................. 2-34
Scrub Deck Lift (40”) ........................................................................................................................... 2-36
Scrub Deck Lift (46”) ........................................................................................................................... 2-38
Scrub Deck (40”) ................................................................................................................................. 2-40
Scrub Deck (46")................................................................................................................................. 2-42
Recovery Tank ..................................................................................................................................... 2-44
Solution Tank ...................................................................................................................................... 2-46
Solution Control................................................................................................................................... 2-48
Steering, Tilt ........................................................................................................................................ 2-49
Directional Control Assembly............................................................................................................... 2-50
Engine Assembly (LP)......................................................................................................................... 2-52
Engine Assembly (Gas)....................................................................................................................... 2-54
Engine Assembly (LP/GAS) ................................................................................................................ 2-56
Engine Assembly (LP/GAS) Cont........................................................................................................ 2-58
Engine Assembly (LP/GAS) Cont........................................................................................................ 2-60
Engine Assembly (LP/GAS) Cont........................................................................................................ 2-62
Fuel Tank ............................................................................................................................................ 2-64
LP Tank............................................................................................................................................... 2-65
Dust Control Assembly........................................................................................................................ 2-66
Hydraulic Subassembly....................................................................................................................... 2-68
Hydraulic Subassembly-cont............................................................................................................... 2-70
Hydraulic Hoses & Fittings.................................................................................................................. 2-72
Hydraulic Hoses & Fittings - cont........................................................................................................ 2-74
Drive & Steering Motor......................................................................................................................... 2-76
Scrub Deck Motors & Lift Cylinder-40”................................................................................................. 2-78
Scrub Deck Motors & Lift Cylinder-46”................................................................................................. 2-79
40" & 46" Scrub Deck-Connections ..................................................................................................... 2-80
Squeegee Lift Cylinder ........................................................................................................................ 2-81
Dust Control Hydraulic Motor............................................................................................................... 2-82
Solution Vacuum Hydraulic Motor........................................................................................................ 2-83
Low Dump Hopper Cylinder ................................................................................................................. 2-84
Main & Side Broom Hydraulic ............................................................................................................. 2-85
Hydraulic Connection Diagram ............................................................................................................ 2-86
Seat Support ....................................................................................................................................... 2-88
Decals................................................................................................................................................. 2-90
Electrical Panel & Harness.................................................................................................................. 2-92
Machine Body Harness Connection Diagram....................................................................................... 2-94
Engine & Hyd. Harness Connection Diagram ...................................................................................... 2-95
Instrument Panel (GAS) ...................................................................................................................... 2-96
Instrument Panel (LP).......................................................................................................................... 2-98
Control Panel ...................................................................................................................................... 2-100
Control Panel Connection Diagram ...................................................................................................... 2-102
Electrical Schematic Gas/LP .............................................................................................................. 2-103
Electrical Schematic Gas/LP-cont....................................................................................................... 2-104
Electrical Schematic Gas/LP-cont....................................................................................................... 2-105
Chapter 3 (Options)
Back-Up Alarm .................................................................................................................................... 3-2
ESP (12V & 36V) ................................................................................................................................ 3-4
Fire Extinguisher ................................................................................................................................. 3-7
Over Head Guard (OHG) ...................................................................................................................... 3-8
Seat Belt Assembly ............................................................................................................................ 3-9
Strobe Light Without OHG (12 & 36 VDC) ........................................................................................... 3-10
Strobe Light With OHG (12 & 36 VDC) ................................................................................................ 3-12
Spray & Vac Wand .............................................................................................................................. 3-14
Index .......................................................................................................................................................... 3-17
Warranty .................................................................................................................................................... 3-21

1-4 American-Lincoln®
SC7740
DIMENSIONS
Length - 89 in. (223 cm)
Width - 47 in. (119.3 cm)
Height - 59 in. (152 cm)
Heightw/OverheadGuard - 81.2 in. (206.2 cm)
Wheel Base - 38.6 in. (98.0 cm)
CLEANINGPATH
Scrubbing - 40 in. (101 cm)
- 46 in. (117 cm)
Sweeping - 46 in. (117 cm)
EdgeCleaning - 6 in. (15 cm) Right Side 46 in. (117 cm) only
TRANSPORTSPEED - 0-4 MPH(0-6.4 kph)
STEERING - Rack & Pinion 90°-90° with HydraulicAssist
TURNINGRADIUS
Left - - 59 in. (150 cm)
Right - 59 in. (150 cm)
Aisle“U”Turn - 87 in. (221 cm)
WEIGHT
StandardMachine(Battery) - 2550lbs.(1157kg.) withoutbattery
- 3580lbs.(1623.9kg.) Operating
TIRES
FrontSolid Urethane - Two (2) 16 in (41cm) x 3.75 in (8.26 cm)
RearSolid Rubber - One (1) 16 in (41 cm) x 4.00 in (10.16cm)
RAMPCLIMBING - Transporting12°
- Operating6°
INSTRUMENTSAND CONTROLS
Main/SideBroomSwitch Key Switch
LowLPIndicator Light HourMeter
SqueegeeSwitch Fuel Gauge
RecoveryTankFullLight Choke
Scrub Deck Switch DustControlSwitch(with certainmodels)
HornButton LowSolutionLight
SolutionControlKnob Filter Shaker Switch
HopperSwitch Engine SpeedSwitch
ParkingBrake DirectionalControlPedal
SCRUBBINGSYSTEM
BrushSize-46”(116.84cm) - Three(3) 16”(40.6cm) Diameter
BrushSize-40”(101.4 cm) - Two(2)20”(51cm) Diameter
ScrubDeckDown Force - 300lbs.(136.0kg.)
BrushRemoval - NoTool
BRUSHOPTIONS
Nylon Amerifil(.025)
Proex Amerifil(.040)
SPECIFICATIONS

American-Lincoln®1-5
SC7740
SPECIFICATIONS
SOLUTIONCONTROL SYSTEM
SolutionTank - 60Gallons(227 liter)Polyethylene
SolutionControl - Variable to 3.0 GPM (11.4 lpm)
Type - GravityFeed
OPTIONALEQUIPMENT
Back-UpAlarm Headlight/Taillights
Seat Belt Strobe Light(Red orAmber)
ESP System OverheadGuard
PadDrivers SqueegeeWand
Spray and Vac Wand Option FireExtinguisher
LinatexSqueegee
DRIVES
Propulsion - Variable DisplacementPump-Hydraulic Motor
Sweeping - Hydraulic
Scrubbing - Hydraulic
Vacuum-SolutionPick-Up Hydaulic
Sweeping - Hydraulic
DustControl - Hydraulic
HYDRAULICSYSTEM
MainPump - LoadPressureCompensatedVariable Displacement
Reservoir - 9.5Gal(35.9 liter)
ControlValves - ElectroHydraulicwith 10Solenoids
Fluid - Mobil MultipurposeATForEquivalent
- DexronIII Fluid
SOLUTIONRECOVERY SYSTEM
VacuumFan - Impellor,HydraulicDrive
RECOVERYTANK - 78 Gallons(295 liter)Polyethylene
SQUEEGEE
Rear - Accu-Trac™ 40 in (101.6 cm) Swing, break away,
Accu-Trac™ 46 in (116.8 cm) Swing, BreakAway
Side - 26 in (66 cm) Floating
SqueegeeMaterial - GumRubber
SWEEPINGSYSTEM
Type - DirectThrow
HOPPER
Capacity - 2.5cu.ft.(71liter)
Weight Capacity - 160 lbs (72 kg)
DUMP AND LIFT
DumpHeight - 14 in (35.6 cm.)
MAINBROOM
Onepieceplastic core disposabletype. Canbe used forwetsweeping, free-floatbroomposition.
Length - 36 in (91.4 cm)
Diameter - 10 inches (25.4 cm)
OptionalBristleType - Nylon(Highdensity)
- - Proex
- - Nylon

1-6 American-Lincoln®
SC7740
SPECIFICATIONS
SIDEBROOM
Side Broom Size - 16 inches(40.6 cm)Diameter
BRAKINGSYSTEM
Dynamic - Hydraulic,ReverseofDrive Motor
Parking - Dual Disc Brakes, MechanicallyActivated
ENGINGESYSTEM
KubotaWG1005
Type - Vertical,WaterCooledFour (4)CylinderGasoline
Engine
BoreandStroke - 2.68in x 2.68in (68mm x 68mm)
HP - 24.5@3600 RPM
OilCapacityDisplacment - 45.2 cu in (740 cc)
Fuel - StandardAutomotiveGasoline
Coolant - 50/50 Ethylen Glycol and Water
Kubota DF1005
Type - Vertical,Water Cooled Four(4) Cylinder LPEngine
BoreandStroke - 2.68in x 2.68in (68mm x 68mm)
HP - 24.5@3600 RPM
OilCapacityDisplacment - 45.2 cu in (740 cc)
Fuel - StandardAutomotiveGasoline
Coolant - 50/50 Ethylen Glycol and Water
FUELSYSTEM
GasTank - 20gal(75.7 liter)
LPGTank - 33lbs(13.61kg)
PROPULSIONSYSTEM
Type - Hydro-Mechanical
Control - FootActivated Pedal

American-Lincoln®1-7
SC7740
MACHINE DIMENSIONS
47.0in
(119.3 cm)
14.3in
(36.3 cm)
27.9in
(70.8 cm)
38.6in
(98.1 cm)
87.0in
(220.9 cm)
87.9in
(223.4 cm)
55.8in
(141.8 cm)
59.9in
(152.2 cm)
81.2in
(206.2 cm)

1-8 American-Lincoln®
SC7740
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

American-Lincoln®1-9
SC7740
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

1-10 American-Lincoln®
SC7740
DECIMAL - METRIC CONVERSION TABLE
FRACTION FRACTIONDECIMAL DECIMALMILLIMETER MILLIMETER
1
64
1
32
3
19
11
13
15
3
5
7
5
3
5
7
9
11
17
19
21
23
25
27
29
31
13
15
64
16 16
16
16
16
16
16
16
64
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
7
11
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
13
15
17
19
21
23
25
27
29
31
15
13
7
3
88
44
8
8
9
64
1
2
0.015625
0.03125
0.046875
0.0625
0.078125
0.09375
0.109375
0.125
0.140625
0.15625
0.171875
0.1875
0.203125
0.21875
0.234375
0.25
0.265625
0.28125
0.296875
0.3125
0.328125
0.34375
0.359375
0.375
0.390625
0.40625
0.421875
0.4375
0.453125
0.46875
0.484375
.05
0.515625
0.53125
0.546875
0.5625
0.578125
0.59375
0.609375
0.625
0.640625
0.65625
0.671875
0.6875
0.703125
0.71875
0.734375
0.75
0.765625
0.78125
0.796875
0.8125
0.828125
0.84375
0.859375
0.875
0.890625
0.90625
0.921875
0.9375
0.953125
0.96875
0.984375
1.00
0.3969
0.7938
1.1906
1.5875
1.9844
2.3813
2.7781
3.1750
3.5719
3.9688
4.3656
4.7625
5.1594
5.5563
5.9531
6.3500
6.7469
7.1438
7.5406
7.9375
8.3344
8.7313
9.1281
9.5250
9.9219
10.3188
10.7156
11.1125
11.5094
11.9063
12.3031
12.7000
13.0969
13.4938
13.8906
14.2875
14.6844
15.0813
15.4781
15.8750
16.2719
16.6688
17.0656
17.4625
17.8594
18.2563
18.6531
19.0500
19.4469
19.8438
20.2406
20.6375
21.0344
21.4313
21.8281
22.2250
22.6219
23.0188
23.4156
23.8125
24.2094
24.6063
25.0031
25.4000
1
C2001-a/9905

American-Lincoln®1-11
SC7740
YOURSC7740MACHINEHASBEENSHIPPEDCOMPLETE,BUTDONOTATTEMPTTO OPERATEWITHOUT
FOLLOWINGTHESEINSTRUCTIONS.
PREPARINGTHE MACHINEFOROPERATION
1. Connectandtighten batterycables.
2. Fillthefule tankwithREGULAR GRADEgasoline(Gasoline Model)andCommercial PetroliumGas(LP
Model).
WARNING
Never fill the tank while the engine is running. Always be sure the gasoline container and sweeper are electrically
connected before pouring gasoline. This can easily be done by providing an insulated wire (permanently attached
to container) with a battery clip on the other end.
3. Check engine crankcase oil level. Although properly lubricated at the factory, check before starting the
engine. Nospecialbreakin oil isused;and recommended numberofoperating hours beforetheinitial oil
change is the same as normal. After the first 50 operating hours, service must be performed on your
enginetoensurefuturehigh performanceand troublefreeoperation. SeeMaintenance.
4. Check radiatorcoolant level. Permanent typeantifreeze is addedat the factoryto provide protec-
tion to approximately -35°F (37°C). To retain this protection level, always add ½ part water to ½ part
antifreeze.
5. Checkfluidlevel inhydraulic reservoirwhichis locatedinthe enginecompartment. Thehydraulicreservoir
is full when fluid can be seen 1/3 of the way up in the sight glass on the front of the reservoir. To get an
accurate reading the hopper must be in the “DOWN” position. If fluid is required add Mobil Multi Purpose
ATS or equivelent Dexron III fluid only. Do not fill the reservoir mor than 1/3 of the way up the sight glass.
SeeMaintenance.
MACHINE PREPARATION
Figure 1
American-Lincoln
®
American-Lincoln
®
American-Lincoln
®
American-Lincoln
®

1-12 American-Lincoln®
SC7740
SAFETY INSTRUCTIONS
THE FOLLOWING STATEMENTSARE USED THROUGHOUTTHIS MANUALAS INDICATED IN THEIR
DESCRIPTIONS:
DANGER
To warn of immediate hazards which will result in severe personal injury or death.
WARNING
To warn of hazards or unsafe practices which could result in severe personal injury or death.
CAUTION
To warn of hazards or unsafe practices which could result in minor personal injury.
ATTENTION
To warn of unsafe practices which could result in extensive equipment damage.
NOTE
To give important information or to warn of unsafe practices which could result in equipment damage.
WARNING
THEFOLLOWINGINFORMATIONSIGNALSPOTENTIALLYDANGEROUSCONDITIONSTOTHEOPERATOROR EQUIP-
MENT. READTHISMANUALCAREFULLY. KNOWWHENTHESECONDITIONS CANEXIST. THEN,TAKENECESSARY
STEPSTOTRAINMACHINEOPERATINGPERSONNEL. FOR THESAFE OPERATIONOF THISMACHINE, READAND
UNDERSTANDALLWARNINGS, CAUTIONSANDNOTES.
WARNING
Machines can ignite flammable materials and vapors. Do not use with or near flammables such as gasoline, grain
dust, solvents, and thinners.
WARNING
Improper use of heavy machinery can cause personal injury.
WARNING
Operate only when lids, doors, and access panels are securely closed.
WARNING
Use care when reversing machine in confined area.
WARNING
When servicing the machine, disconnect the batteries first to prevent possible injury.
WARNING
When working on the machine, empty hopper, remove batteries, clear area of people and obstructions, use
additional people and proper procedures when lifting the machine.
WARNING
Always empty the hopper and disconnect the battery before doing maintenance.
WARNING
You must have training in the operation of this machine before using it. READ THE INSTRUCTION BOOK.
WARNING
Do not operate this machine unless it is completely assembled.
WARNING
Do not use this machine as a step or furniture.
WARNING
Stop and leave this machine on a level surface. When you stop the machine, put the power switch in the “OFF”
position and engage the Wheel Lock.

American-Lincoln®1-13
SC7740
WARNING
To prevent injury and damage to the machine, do not lift the machine or move it to an edge of a stair or loading
dock.
WARNING
Lead acid batteries generate gases which can cause an explosion. Keep sparks and flames away from batteries.
NO SMOKING. Charge batteries only in areas with good ventilation.
WARNING
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 across the tops of batteries.
WARNING
Maintenance and repairs must be done by authorized personnel only. Tighten all fasteners. Maintain adjustments
according to the specifications given in the service manual for the machine. Keep the electrical parts of the
machine dry. For storage, keep the machine in a building.
WARNING
Make sure all labels, decals, warnings, cautions and instructions are fastened to the machine. Purchase new
labels and decals from American-Lincoln.
WARNING
The operator must exhibit extreme caution when negotiating, turning, and traveling across grades or ramps. Start,
stop, change direction, travel and brake smoothly. Slow down when turning.
WARNING
Avoid uneven surfaces and loose materials. Watch for obstructions, especially overhead.
WARNING
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 lighted areas.
WARNING
Do not carry passengers on the machine. Set the Wheel Lock when leaving the machine. Chock (block) the
wheels if the machine is parked on a grade (ramp), or is being prepared for Maintenance.
WARNING
Never leave the operator’s compartment when the is engine running.
WARNING
Report damage or faulty operation immediately. Do not operate the machine until repairs have been completed.
Maintenance and repairs must be done by authorized
personnel only.
WARNING
To maintain the stability of this machine in normal operation, the overhead guard, counterweights, roller bumper
guards, or any similar equipment installed by the manufacturer as original equipment should never be removed. If
it becomes necessary to remove such equipment for repair or maintenance, this equipment must be reinstalled
before the machine is placed back into operation.
WARNING
Electrical hazard. Shocks can cause serious personal injury. Unplug the battery before cleaning or servicing. To
avoid possible injury or property damage, read the Operator’s Manual before servicing the machine. Maintenance
and repair must be done by authorized personnel.
WARNING
Disconnecting the battery connector with the key switch in the “I” position will cause sparks that could ignite
explosive hydrogen gas generated by the batteries. To prevent serious injury or possible property damage, turn
Key Switch to “O” position before disconnecting the battery cable from the machine for charging or service.
SAFETY INSTRUCTIONS

1-14 American-Lincoln®
SC7740
SAFETY INSTRUCTIONS
FOR SAFETY, OBSERVE THE FOLLOWING WARNINGS. FAILURE TO COMPLY MAY CREATEA
SERIOUS RISK OF INJURY TO YOU AND OTHERS. THIS MACHINE SHOULD NOT BE USED IN
HAZARDOUSLOCATIONS INCLUDINGAREASOF VOLATILEDUST ORVAPOR 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.
Donotdump thehopperover an openpit or dock.Do not dumpthehopper whenpositionedon agrade(ramp).
Themachinemustbelevel (horizontal).

American-Lincoln®1-15
SC7740
OPERATION OF CONTROLS AND GAUGES
LEFTSIDE CONSOLE
The left side console contains a set of nine (9) switches, a top bank of four (4) and a bottom bank of
five (5). The console is completely fuse-driven.
LIGHT SWITCH (OPTIONAL)
If installed the two-way light switch is located on the lefthand console in the bottom bank. By pressing on the
lowerpart ofthe switch,variouslightoptionsavailableforthismachinearecontrolled. Pressingtheupperportion
of the switch turns off all light options.
DUSTCONTROL/FILTER SHAKERSWITCH
Thedustcontrol/filter shakerswitch islocatedon theleftside consolein thetopbank. By pressingthetop ofthe
switch,thefiltershakermotorisactivated forapproximately 20seconds. The impellerfan willstopwhenthefilter
shaker has been activated. The filter shaker will only operate with the hopper in the “DOWN” position. If the
switch is in the middle position, the dust control sytem automatically engages when the main broom is lowered
and disengages when the broom is raised. Pressing the bottom of the switch turns the dust control system off
completely,usinga manualoverride. The dustcontrol systemshould NOT beusedifsweepinginwet conditions
inorderto avoiddust filterdamage.
NOTE
The filter shaker will automatically run each time the broom is turned off and the DustControl is in Auto mode
(switch is in middle position).
MAIN BROOM & SIDE BROOM SWITCH
The main & side broom switch is located on the left side console in the bottom bank. By pressing in the upper
portion of the switch, the side and main broom are raised and turned off. To lower and turn on both brooms for
normal (flat surface) sweeping, press the lower portion of the switch. If a “FLOAT” (uneven surface) position is
desired, the brooms must be adjusted manually. (See Main & Side BroomAdjustment in this chapter.)
SCRUBDECK SWITCH
Thethree-wayscrubdeckswitch islocated ontheleftsideconsole inthe bottombank.Inthemiddleposition, the
scrub brush deck is lowered and the three brushes activated for normal scrubbing. To activate heavy-pressure
scrubbing, press the lower portion of the switch. Pressing the upper portion of the switch stops brush rotation
and raises the scrub deck.
NOTE
Lowering the scrub deck will not start the brushes rotating. The foot pedal must be moved to engage the scrub
brushes. If the machine stops moving for 2 seconds or more, the brushes will automatically stop rotating until
the machine starts moving again.
OPTION
LIGHT SWITCH
MAIN & SIDE
BROOM
SWITCH
HOPPER
SWITCH
SCRUB DECK
SWITCH
ENGINE
SPEED
SWITCH
SQUEEGEE/VAC
SWITCH
ESP
SWITCH
DUST
CONTROL/FILTER
SHAKER
SWITCH
OPTION
SWITCH

1-16 American-Lincoln®
SC7740
OPERATION OF CONTROLS AND GAUGES - Cont.
ENGINESPEED SWITCH
This two-position switch, located on the left side console in the bottom bank, controls the engine. The switch
positiondetermines thegoverned operatingspeedoftheengine. Placethespeedswitchinthe“IDLE”positionto
startthe machine. Place thespeedswitch inthe“FAST” positionfortransport andduring normaloperation,
NOTE
The engine will NOT start unless the switch is in the “IDLE” position.
SQUEEGEE/VACSWITCH
Thesqueegeeswitch islocated onleftside consolein thebottombank. Pressing theupper portionofthe switch
raisesthesqueegee andturnsoff thesqueegeevacuum system.
In the middle position, the squeegee and its vacuum system will operate automatically when the machine’s
scrub deck is lowered. When the scrub deck is raised, the squeegee and vacuum system automatically shuts
down. The vacuum functions on a 15-second delay, collecting the water remaining in the recovery hose. If the
scrub deck is down and the machine is put in reverse (activated by the FWD/REV pedal), the squeegee will
automaticallyraise,againwiththe vacuumon a15-second delay. When themachine isonce againplacedinthe
forwardposition,the squeegeewill lowerandthe vacuumautomaticallyturns on.
In pressing the lower portion of the switch a manual override is engaged, allowing the squeegee and vacuum
system to operate independent of the scrub deck. Again, if the machine is placed in reverse, the squeegee
automaticallyraisesand thevacuum systemshuts off followinga15-seconddelay, resumingoperation oncethe
machinereturnsto itsforwardmotion.
HOPPERSWITCH
Thehopper switchis locatedon theleftside console. Theswitch controlsoperationofthehopper. To dumpdebris
fromthehopper,presstheupperportion ofthe switchandcontinue tohold untilthe hopperisfully open.To lower
the hopper, press the lower portion of the switch and continue to hold until the hopper returns to the closed
position.
ESP SWITCH (OPTIONAL)
Ifinstalledthe ESPswitch islocatedin theleftside consoleonthe farright ofthetop bank.Thisswitch isan open
switch unless a machine option, such as a water recycling system, is ordered installed on the machine.
OPTION
LIGHT SWITCH
MAIN & SIDE
BROOM
SWITCH
HOPPER
SWITCH
SCRUB DECK
SWITCH
ENGINE
SPEED
SWITCH
SQUEEGEE/VAC
SWITCH
ESP
SWITCH
DUST
CONTROL/FILTER
SHAKER
SWITCH
OPTION
SWITCH

American-Lincoln®1-17
SC7740
OPERATION OF CONTROLS AND GAUGES - Cont.
KEYSWITCH
Thekeyedignitionswitchislocatedin thelower righthandcorner ofthe
instrumentpanel. The“OFF”position(Oposition)willshutofftheengine.
The“IGN/ON”position(Iposition)providespowertoallmachinesystems
and accessories. The “START” position (one position clockwise of I
position)ismomentary andprovides power tothe startermotor.
NOTE
To reengage, the key must be returned to the “OFF” position.
HOURMETER
Thehourmeterislocatedonthe righthandside ofthe instrumentpanel
next to the fuel guage. The meter is activated when the key switch is
placed in the ignition position. The meter indicates the actual “run”
time of the machine. The meter can also be used to determine when
maintenanceshouldbe doneonthe machine.
FUELGAUGE/LPINDICATORLIGHT
The fuel gauge or LP indicator light is located on the instrument panel
totheleft ofthehour meterandindicates thelevelof fuelinthe tank or
lowLPindicator light. Thekeyswitch powersthefuel gauge. Thekey
switchmustbeinthe “ON”position forthefuelgaugeto work. Thefuel
gauge is not included on machines that use Liquid Propane fuel.
BACK-UPALARM SWITCH(Option)
The back-up alarm is operated by a switch located under the lower
section of the accelerator and directional control pedal. The alarm
makes a loud audible noise when the machine is being driven in re-
verse.
SOLUTIONCONTROL KNOB
Thesolutioncontrol knobis locatedtothe lefthand sideofthesteering
wheelbelowtheindicatorlights.Turningtheknobclockwisewillincrease
the flow of solution. Turning the knob counterclockwise will decrease
theflowofthesolution. Toturnthesolutionoffturn theknoballtheway
counterclockwise.
NOTE
For best results, discontinue application of solution10 feet before
stopping or making a 90° or 180° turn.

1-18 American-Lincoln®
SC7740
WARNING BANK
The Warning Bank is located on the lefthand side of the instrument panel and provides the operator
with eight fault/status indicators for engine, sweeping, and scrubbing systems. The operator should
monitor the indicators whenever operating the SC7740. It is very important the operator be familiar
with the meaning of each indicator.
ENGINETEMP LIGHT
Theengineteperaturelightilluminatestoindicateanengine coolingsystem fault. Whenthis occurs,the operator
mustturnoffthe SC7740immediatelyand havethecooling systemservicedby aqualifiedtechnician.
ENGINEOIL PRESSURELIGHT
When the oil pressure drops below approximately 5 psi, an automatic protection circuit shuts down the engine
andilluminatesthe lighttoindicate lowoilpressure. When thisoccurs, have theSC7740 servicedbya qualified
technician.
CHARGINGSYSTEM LIGHT
The charging system (battery) light illuminates to indicate a charging system fault. When this occurs, the
SC7740 charging system is not working properly and must be serviced by a qualified technician.
HIGHRECOVERY LIGHT
Therecovery highwarning light,located onthe lefthandside ofthe instrumentpanel, willilluminate approximately
5minutesbeforetherecoverytankisfull,giving ampletime tocomplete thescrubbing cycle,before themechani-
cal float shuts off the vacuum to the recovery tank.
LOW SOLUTION LIGHT
The low solution warning light , located to the left of the high recovery light, will illuminatewhen thesolution tank
is empty and marks the end of the scrubbing cycle.
OPERATION OF CONTROLS AND GAUGES - Cont.
CHARGING
SYSTEM
LIGHT
ENGINE
TEMP
LIGHT
ENGINE
OIL
PRESSURE
LIGHT
HIGH
RECOVERY
LIGHT
DUMP
DOOR
LIGHT
LOW
SOLUTION
LIGHT

American-Lincoln®1-19
SC7740
HOPPERSAFETY ARM
The hopper safety arm is located near the right front wheel
well. The safety arms prevents the hopper from dropping
unexpectedlyduring service/maintenance.
TOENGAGE SAFETYARM:
1. Raisehopper.
2. Set parking brake.
3. Lift safety arm to engage the slot on the hopper frame.
4. When work has been completed, replace the safety arm
to the stowed position.
SEATPOSITIONADJUSTMENT
The seat position adjustment lever is located on the front of
theseatto theleft. Thelever isspring-loadedto the “LOCK”
position. To adjust the seat, push the lever to the “RIGHT”
andmovethe seat tothedesired position. Thenreleasethe
leverto“LOCK” the seat intoplace.
DIRECTIONALCONTROLPEDAL
The Directional Control Pedal is located on the floor of the
operator’sarea.This pedalcontrolsthe machinedirection.
1. Apply foot pressure on the right side of the pedal to
movethe machineforward.
2. Increase foot pressure on the right side of the pedal to
increasethe forwardspeed.
3. Apply foot pressure on the left side of the pedal to move
themachineinreverse.
4. Increase the pressure on the left side of the pedal to
increasethe reversespeed.
TheDirectionalControlPedalalsocontrolsthedynamicbraking
ofthemachine.
1. To stop the machine, allow the directional control pedal
toreturnto theneutral(center) position. Thepedal will
automaticallyreturnto the neutralpositionwhen the
foot pedal is released, or when light foot pressure is
applied on the opposite side of the pedal. If the
machineismoving forward,put lightfootpressure on
the left side of the pedal. If the machine is moving in
reverse,putlight foot pressure ontheright side ofthe
pedal.
OPERATION OF CONTROLS AND GAUGES - Cont.
C2148/0602
C2155/0602