Nilfisk 91WS User Manual

AMERICAN-LINCOLN

TECHNOLOGY

Operator's Manual

Beginning with Serial No. 306005

READ THIS BOOK!

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.

91WS

Walkbehind

Sweeper

ISO 9001

FILE A2287

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: Alto U.S., Inc., 1100 Haskins Road, Bowling Green, Ohio 43402

Part No. 2-86-00180 1995 American-Lincoln Technology® 950327

Printed in the USA

TABLE OF CONTENTS

MACHINE SPECIFICATIONS........................................................................................................................ 1-3

MACHINE PREPARATION.............................................................................................................................1-5

GAS/LP POWERED MACHINES ........................................................................................................... 1-5

BATTERY POWERED MACHINES ........................................................................................................ 1-6

SAFETY PRECAUTIONS ............................................................................................................................... 1-7

MACHINE CONTROLS .................................................................................................................................. 1-9

KEY SWITCH .......................................................................................................................................... 1-9

BATTERY CONDITION METER (BATTERY ONLY)................................................................................ 1-9

HOUR METER .........................................................................................................................................1-9

START BUTTON (GAS/LP ONLY) ........................................................................................................... 1-10

BATTERY VOLT METER (GAS/LP ONLY) .............................................................................................1-10

CHOKE CONTROL (GAS/LP ONLY) ...................................................................................................... 1-10

LOW OIL LIGHT (GAS/LP ONLY) ........................................................................................................... 1-10

FILTER SHAKER SWITCH......................................................................................................................1-10

SIDE BROOM LIFT HANDLE.................................................................................................................. 1-11

MAIN BROOM LEVER ............................................................................................................................1-1

MAIN BROOM ADJUSTMENT ................................................................................................................ 1-11

FILTER MANIFOLD LATCH .....................................................................................................................1-12

HOPPER DUMP HANDLE ......................................................................................................................1-12

FORWARD/REVERSE CONTROL HANDLE ......................................................................................... 1-12

CIRCUIT BREAKERS ..............................................................................................................................1-13

REWIND STARTER .................................................................................................................................1-13

OPERATING INSTRUCTIONS ...................................................................................................................... 1-14

BATTERY MACHINE OPERATION......................................................................................................... 1-14

GAS/LP MACHINE OPERATION ............................................................................................................ 1-14

PRE-START CHECKLIST ........................................................................................................................ 1-15

TO START THE BATTERY POWERED SWEEPER .............................................................................. 1-15

TO START THE GAS POWERED SWEEPER ...................................................................................... 1-15

TO START THE LP POWERED SWEEPER ......................................................................................... 1-15

TO START THE ENGINE WITH THE REWIND STARTER ..................................................................... 1-16

TO DRIVE THE MACHINE FOR TRANSPORT ...................................................................................... 1-16

TO SWEEP WITH MACHINE ................................................................................................................. 1-16

TO EMPTY HOPPER ..............................................................................................................................1-16

TO STOP SWEEPER ............................................................................................................................. 1-16

POST OPERATION CHECKLIST ............................................................................................................ 1-17

BA TTER Y CHARGING INSTRUCTIONS................................................................................................. 1-17

TO CHARGE THE MOTIVE POWERED BATTERIES (BATTERY ONLY)............................................. 1-18

GASOLINE POWERED MACHINE FUELING INSTRUCTIONS ............................................................ 1-18

TO FILL THE GASOLINE POWERED MACHINE FUEL TANK ............................................................. 1-18

LP POWERED FUELING INSTRUCTIONS ............................................................................................ 1-18

TO CHANGE THE LP TANKS .................................................................................................................1-19

MACHINE STORAGE - GASOLINE POWERED MACHINES ............................................................... 1-19

MACHINE STORAGE - BATTERY POWERED MACHINES ................................................................. 1-19

SERVICE CHART........................................................................................................................................... 1-20

HOW TO SWEEP .......................................................................................................................................... 1-22

SWEEPING GUIDELINES ...................................................................................................................... 1-22

SWEEPING VARIOUS TYPES OF DEBRIS.......................................................................................... 1-22

SERVICE INSTRUCTIONS ............................................................................................................................ 1-23

MAIN BROOM .........................................................................................................................................1-23

TO CHECK THE MAIN BROOM SWEEP PATTERN............................................................................. 1-23

TO ADJUST THE MAIN BROOM SWEEP HEIGHT............................................................................... 1-23

TO REPLACE THE MAIN BROOM......................................................................................................... 1-24

SIDE BROOM .......................................................................................................................................... 1-25

TO CHECK THE SIDE BROOM SWEEP PATTERN.............................................................................. 1-25

TO ADJUST THE SIDE BROOM SWEEP HEIGHT ................................................................................ 1-25

TO CHANGE THE SIDE BROOMS ........................................................................................................ 1-26

DUST CONTROL .................................................................................................................................... 1-26

TO CLEAN THE FILTER BAFFLE ........................................................................................................... 1-26

TO CLEAN THE PANEL FILTER .............................................................................................................1-26

American-Lincoln 1 - 1 91 WS

TABLE OF CONTENTS

TO CHANGE THE PANEL FILTER .......................................................................................................... 1-26

FLAPS ..................................................................................................................................................... 1-27

TO ADJUST THE SIDE FLAPS ............................................................................................................... 1-27

HOPPER .................................................................................................................................................. 1-27

TO CLEAN THE HOPPER ...................................................................................................................... 1-27

TO CHECK THE HOPPER SEALS ........................................................................................................ 1-27

BATTERY ................................................................................................................................................. 1-27

ENGINE AIR INTAKE .............................................................................................................................. 1-28

FUEL FILTER ........................................................................................................................................... 1-28

TO CHECK THE ENGINE OIL LEVEL .................................................................................................... 1-29

DRIVE SYSTEM ...................................................................................................................................... 1-29

TO ADJUST NEUTRAL SETTING............................................................................................................1-29

‘ REPLACING THE FORWARD DRIVE BELT ..........................................................................................1-29

REPLACING THE REVERSE BELT ....................................................................................................... 1-30

LP SAFETY PRECAUTIONS ......................................................................................................................... 1-31

LP GAS SYSTEM .......................................................................................................................................... 1-32

LP LIQUID WITHDRAWAL SYSTEM ...................................................................................................... 1-32

LP CHECKLIST ........................................................................................................................................ 1-33

LP FUEL TANKS ..................................................................................................................................... 1-33

‘ USE AND CARE OF LP TANKS .............................................................................................................1-34

CHANGING LP TANKS ........................................................................................................................... 1-34

TO BEGIN CHANGING THE LP TANK .................................................................................................. .1-34

STORAGE OF LP TANKS ....................................................................................................................... 1-34

STANDARD HARDWARE & TORQUE VALUES ........................................................................................... 1-35

DECIMAL METRIC & CONVERSION TABLE ...............................................................................................1-36

BOLT IDENTIFICATION ................................................................................................................................ 1-37

LEGENDS - SCREW/SETSCREWS .............................................................................................................. 1-38

HARDWARE LEGEND ................................................................................................................................... 1-39

ORDERING PARTS........................................................................................................................................ 1-42

TABLE OF CONTENTS - CHAPTER 2.......................................................................................................... 2-1

FRAME .................................................................................................................................................... 2-2

COVERS.................................................................................................................................................. 2-4

WHEEL DRIVE ........................................................................................................................................ 2-6

LOWER WHEEL DRIVE ......................................................................................................................... 2-8

‘ MAIN BROOM ......................................................................................................................................... 2-10

MAIN BROOM ARMS ..............................................................................................................................2-12

RIGHT HAND SIDE BROOM...................................................................................................................2-14

HOPPER.................................................................................................................................................. 2-16

FILTER SHAKER .....................................................................................................................................2-18

IMPELLER ............................................................................................................................................... 2-20

BATTERY................................................................................................................................................. 2-22

ENGINE ................................................................................................................................................... 2-24

ELECTRICAL ASSEMBLY (BATTERY) .................................................................................................. 2-26

ELECTRICAL ASSEMBLY (GAS) ...........................................................................................................2-28

CONTROL PANEL ................................................................................................................................... 2-30

DECALS................................................................................................................................................... 2-34

TABLE OF CONTENTS - CHAPTER 3.......................................................................................................... 3-1

LEFT HAND SIDE BROOM OPTION ...................................................................................................... 3-2

LOW OIL SHUTDOWN OPTION .............................................................................................................3-4

FOAM-FILLED TIRE OPTION ................................................................................................................. 3-6

WET SWEEP BYPASS OPTION ........................................................................................................... 3-7

SPARE PARTS KITS ............................................................................................................................... 3-8

MAIN BROOM OPTIONS ........................................................................................................................3-9

SCHEMATIC & CONNECTION DIAGRAMS (BATTERY) ....................................................................... 3-10

SCHEMATIC & CONNECTION DIAGRAMS (GAS)................................................................................ 3-11

INDEX ........................................................................................................................................................... 3-12

WARRANTY ................................................................................................................................................... 3-15

1-2 American-Lincoln

91 WS

SPECIFICATIONS

SWEEPING P ATH 36 inches (91.44 cm) with single side broom

45 inches (1 14.30 cm) with dual side broom

TRAVEL SPEED 0-3 m.p.h.

DIMENSIONS

Length 60.00 inches (152.40 cm) Width 34.00 inches (86.36 cm) Height 39.00 inches (99.06 cm) Wheel Base 22.65 inches (57.79 cm) Track 32.00 inches (81.28 cm)

WEIGHT (SHIPPING)

Gas Machine 460 lbs. (171.58 kg) LP Machine 460 lbs. (171.58 kg) LP Tank 20 lbs. (7.46 kg) 24 VDC Machine 385 lbs. (143.61 kg) Batteries 275 lbs. (102.58 kg) Charger 30 lbs. (1 1.19 kg)

WHEELS

Rear Cater (1) 2.0 wide x 5.00 dia. Molded Non-marking Urethane Front Drive (2) 2.0 wide x 10.00 dia. (5.08 cm wide x 25.4 cm dia)

Solid grey Non-marking Rubber St andard or

3.0 wide x 10.00 dia (5.08 cm wide x 25.4 cm dia) Foam Filled Grey Non-marking Rubber (Optional)

POWER SOURCES

24 VDC Battery

24 volt system, 1.3 HP (.97 kw) Electric Motor , (2) 12 volt batteries in series, 185 A.H. @ 20 hour discharge rating

Gas/LP

Briggs & Stratton 8 HP I/C Engine with electric and backup recoil start, Dual Element Air Filter, 1.5 gal Fuel T ank, Low Oil Shutdown Briggs & Stratton I/C Series

Model 1 cylinder, 8 HP (6 kw) Bore 3 inches (7.62 cm) Stroke 2.75 inches (6.98 cm) Displacement 19.44 cu. inches (319.0 cc) RPM 2200 Max.

DRIVE SYSTEM

Unit is self-propelled in forward and reverse, controlled by a full width handle bar, dual flat belt drive to automotive type differential, chain drive wheels, belt driven main and side brooms.

CONTROLS AND INSTRUMENTA TION

Key Switch (with push button ST AR for Gas/LP machines) Forward/Reverse Handle Hour Meter Ammeter (Gas/LP Models) Fuel Gauge (Gas/LP Models) Condition Meter (Gas/LP Models) Single Lever Raises and Lowers Main Broom Single Lever Raises, Lowers, and Activates Side Broom

American-Lincoln 1 - 3 91 WS

SPECIFICATIONS

SWEEPING SYSTEM

T ype Direct Throw Main Broom

One place plastic core disposable type. No tool charge. Position can be set to “Restricted Down” or “Free Float”.

Length 27 inches (68.6 cm) Diameter 11 inches (27.90 cm) Bristle Length 3 inches (7.62 cm) long, usable to 1.00 inch Option Bristle T ypes Proes, Nylon, High Density Nylon

Side Broom Rotary disposable type with 1.25 inches (3.17 cm) thick marine grade varnished hardwood disk. Floats over uneven surfaces and is adjustable for wear. Retract s up to impact. No tool charge.

Diameter 16.00 inches (40.60 cm) Bristle T ype Polypropylene

Hopper Molded polypropylene construction with handle to dump and levers to remove (no tool).

Volumetric Capacity 3 cu. ft. (85.00 It) Weight Capacity 220 lbs. (82.06 kg) Ground Clearance 3 inches (7.62 cm)

Dust Control One pleated water resistant fibre type panel filter with automatic timed (20 seconds) filter shaker . Patented shaker system. No tool quick change filter.

Filter Area 40 sq. ft. (3.70 m²) Impeller 9 inches dia.

OPTIONAL EQUIPMENT

Left Hand Side Broom Low Oil Light Shaker Switch Foam Filled Tires in Lieu of Solid Tires

MACHINE DIMENSIONS

39.00"

99.06 cm

34.00"

C0606

86.36 cm

36.00"

91.44 cm

60.00"

152.40 cm

1-4 American-Lincoln

91 WS

MACHINE PREPARATION

C1199 FIGURE 1

MACHINE PREP ARATION

Y our American-Lincoln T echnology sweeper has been shipped complete, but do not attempt to operate before reading and following the preparation instructions for your type of machine.

GAS/LP POWERED MACHINES

1. Uncrate the machine and carefully remove it from the skid to prevent damage.

2. Inspect the machine for obvious damage and check the controls for proper operation.

3. Connect and tighten battery cables.

4. Fill fuel tank with regular grade unleaded gasoline. *Install filled LP tank and connect fuel line to the tank. *Turn on service valve, check all LP connections for leaks. *Turn off service valve after inspection has been completed.

5. Check engine crankcase oil level. Although properly lubricated at the factory , check before starting engine. The engine uses no special break in oil. The recommended number of hours before the initial oil change is 5 hours (see maintenance chart).

6. For safety , do not operate until you have read the safety precautions and operation instructions in the manual.

*=LP Powered machines only

WARNING

To prevent possible fire, never fill fuel t ank while the engine is running. Always be sure gasoline cont ainer and

sweeper are electrically grounded before dispensing gasoline. This can be done by permanently attaching an

insulated wire with a battery clip on the end to the gasoline container .

WARNING

Keep cigarettes, sparks, and open flame away from LP equipment.

Use extreme caution when inspecting for gas leaks.

American-Lincoln 1 - 5 91 WS

MACHINE PREPARATION

C0605 FIGURE 2

BA TTERY POWERED MACHINES

The battery powered machines may be shipped with the batteries and charger in separate containers. The batteries will need to be filled with electrolyte if batteries were shipped dry .

1. Uncrate the machine and carefully remove it from the skid to prevent damage.

2. Inspect the machine for obvious damage and check the controls for proper operation.

3. Connect and tighten battery cables. (See Figure 2)

4. Connect battery cables. Be sure to observe polarity . (See Figure 2)

5. Charge batteries using the quick disconnect provided. Leave the top cover open while charging to prevent build up of explosive gases generated during the charging process. Refer to the charging instructions provided in the manual and on the charging unit being used.

6. For safety , do not operate until you have read the safety precautions and operation instructions in the manual.

WARNING

Lead acid batteries generate gases which can cause an explosion. Make sure the switch on the charger is in the

“OFF” position before connecting or disconnecting the charger. If no switch is provided, unplug the charger before

making connections to the batteries. Keep sparks and flame away from batteries. NO SMOKING. Charge the

batteries only in an area with good ventilation and leave the top cover open while charging.

WARNING

Batteries contain sulfuric acid which can cause burns to exposed skin or eyes. T o prevent injury, wear protective clothing and safety glasses when working on batteries. In the event that acid comes in contact with skin or eyes,

flush affected area with fresh water for a minimum of 5 minutes and get medical attention immediately .

1-6 American-Lincoln

91 WS

SAFETY PRECAUTIONS

SAFETY PRECAUTIONS The following statements are used throughout this manual as 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.

A TTENTION

To warn of unsafe practices which could result in extensive equipment damage.

NOTE

To give import ant information or to warn of unsafe practices which could result in equipment damage.

THE FOLLOWING INFORMA TION SIGNALS POTENTIALL Y DANGEROUS CONDITIONS TO THE OPERATOR OR EQUIPMENT . READ THIS MANUAL CAREFULLY . KNOW WHEN THESE CONDITIONS CAN EXIST. THEN, T AKE NECESSARY STEPS TO TRAIN MACHINE OPERA TING PERSONNEL.

FOR THE SAFE OPERA TION OF THIS MACHINE, READ AND UNDERST AND ALL WARNINGS. CAUTIONS AND NOTES.

WARNING

Machines can ignite flammable materials and vapors. Do not use with or near flammables such as: gasoline, grain

dust, solvents and thinners.

WARNING

Heavy machinery. Improper use 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 Battery before doing maintenance.

WARNING

Y ou 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.

American-Lincoln 1 - 7 91 WS

SAFETY PRECAUTIONS

WARNING

Do not use this machine as a step or furniture.

WARNING

Be careful when operating the machine on a ramp or incline. Always move slowly on a ramp. Do not turn this

machine on a ramp. Do not stop and leave this machine on a ramp.

WARNING

Stop and leave this machine on a level surface. When you stop the machine, put the key switch in the “OFF”

position.

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 area with good ventilation and always leave the top cover open while

charging batteries. Do not disconnect the charger from the batteries before disconnecting the AC power cord.

Disconnecting the battery cable with the charger plugged in could cause an explosion.

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 the tops of batteries.

WARNING

Maintenance and repairs must be done by authorized personnel only . T ighten all fasteners. Keep 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 that all labels, decals, warnings, cautions and instructions are fastened to the machine. Get new labels

and decals from American-Lincoln.

1-8 American-Lincoln

91 WS

MACHINE CONTROLS

C0602 FIGURE 3

MACHINE CONTROLS KEY SWITCH

The key switch is a two position rotary ON/OFF switch that is located on the control panel.

The filter shaker will activate for 20 seconds after the key switch is turned to the “OFF” position unless equipped with the optional filter shaker switch.

Gas/LP Powered Machines

The key switch must be turned “ON” before using the electric starter button or the pull start.

-Turn the key switch to the “ON” position before using the start button.

-Turn the key switch to the “OFF” position to turn off the sweeper .

Battery Powered Machines

T o conserve battery power turn the key switch “OFF” when leaving the machine unattended even if only for a minute. Run time for the battery powered machine can vary with operating conditions and machine maintenance practices.

-Turn the key switch to the “ON” position to turn on the sweeper .

-Turn the key switch to the “OFF” position to turn off the sweeper .

BA TTERY CONDITION METER (Battery Powered Machines)

The battery condition meter is located on the left side of the console. The condition meter indicates the level of charge in the batteries. The batteries are sufficiently charged when the needle stays in the green area on the gauge while the machine is being operated. Charge the batteries when the needle drops into the red zone while operating the machine.

WARNING

Do not operate the machine if the needle stays in the red zone. Operating the sweeper with discharged batteries

will degrade battery life.

HOUR METER

The Hour Meter is located on right side of the console. The meter is activated when the key switch is on. The meter indicates actual run time of the sweeper. The meter is used to determine when maintenance should be performed.

American-Lincoln 1 - 9 91 WS

MAIN

BROOM

MACHINE CONTROLS

MAIN BROOM LEVER

LP P

BATTERY VOLT METER

MAIN

BROOM

FLOAT

SWEEP

WERED MA

CHOKE CONTROL

CHOKE

BATTERY

CB-1 CB-2

KEY SWITCH

OFF

FILTERSHAKER

HINE

START BUTTON

START

NTR

HOUR METER

HOURS

0 0 0 0 0

OFF

LOW OIL LIGHT

LOW OIL

FILTER SHAKER SWITCH

SIDE BROOM LIFT CONTROL

MAIN BROOM ADJUSTMENT

C-0601

CIRCUIT BREAKERS

FWD./REV. CONTROL HANDLE

C0601 FIGURE 4

ST ART BUTTON (Gas/LP Only)

The start button is located on the right side of the console next to the key switch. The start button is a momentary push button switch that energizes the electric starter motor when pushed. The key switch must be turned on before using the start button to start the engine.

WARNING

Do not hold the start button for more than 15 seconds at a time. Allowing the starter motor to run for more than 15

seconds at a time may cause permanent damage to the starter motor.

To start the engine, push and hold the switch until the engine starts.

BA TTERY VOL T METER (Gas/LP Only)

The battery volt meter is used to monitor the charging system on GAS/LP Powered machines.

The meter indicates the voltage of the battery . A properly charged battery will indicate approximately 13.8 volts. A reading of less than 12 volts could be an indication of a charging system fault.

CHOKE CONTROL (Gas/LP Only)

The choke control is located on the console. The choke governs the air/fuel mixture during the combustion cycle of the engine operation. The choke should be pulled out while starting the engine and then gradually pushed back in after the engine warms up.

LOW OIL LIGHT (Gas/LP Only)

The low oil light is located on the console. The low oil light is part of a protection feature for the engine. When the oil level drops below a safe level the engine shuts off and illuminates the light to advise the operator of the low oil level. When this occurs check the oil level in the engine and add oil as necessary . The oil level must be full before the engine will start.

FIL TER SHAKER SWITCH

The filter shaker switch is a two position rocker switch that is located on the console. When the filter shaker switch is set to the “ON” position the filter shaker will operate automatically for approximately 20 seconds after the key switch is turned off. The “OFF” position disables the automatic shake cycle which would normally occur after turning the key switch off.

1-10 American-Lincoln

91 WS

C-0611

C0611 FIGURE 5

MACHINE CONTROLS

SIDE BROOM LIFT HANDLE

The Side Broom lift handle is located at the rear of the sweeper on the right side. The lift handle raises and lowers the side broom. Broom rotation stops when the side broom is raised.

-T o raise the side broom, pull the handle out and down to lock the broom in the raised position.

-T o lower the side broom, move handle up and forward into the slot.

MAIN BROOM LEVER

The main broom lever is located on the left side of the console. The main broom lever has three positions that control the main broom sweep height.

C0612 FIGURE 6

T o lower the main broom, grasp the lever and move it to the right out of the “UP” position and place the lever in the “SWEEP” or “FLOA T position.

The “SWEEP” position is for normal sweeping and should be used for most sweeping conditions.

The “FLOA T” position is used for sweeping very uneven surfaces only . Using the float position will cause premature wear on the main broom if used under normal operating conditions for extended periods of time.

MAIN BROOM ADJUSTMENT

The main broom adjustment is located at the rear of the machine. Adjust the main broom sweep height to compensate for wear of the broom bristles. Check the main broom sweep height regularly and adjust as necessary . (See “Main Broom Service” in this manual)

MAIN BROOM ADJUSTMENT

TO LOWER BROOM

C0613/9705

TO RAISE BROOM

C0613 FIGURE 7

American-Lincoln 1 - 11 91 WS

MAIN

BROOM

CB-1

CB-2

FILTER

SHAKER

BATTERYCONDITION

CHECK

WHILE

OPERATING

OFF

MACHINE CONTROLS

C0609 FIGURE 8

FIL TER MANIFOLD LA TCH

The filter manifold latch is located on the hinged filter manifold assembly . The latch must be disengaged before dumping the hopper or removing the dust filter. Apply slight down pressure on the edge of the manifold assembly to ease removal.

T o disengage the filter manifold latches, apply slight down pressure to the manifold assembly and lift the latch off the catch.

C0608 FIGURE 9

FORWARD/REVERSE CONTROL HANDLE

FORWARD

MAIN

BROOM

FLOAT

SWEEP

NEUTRAL

A T

-1

-2

HOPPER DUMP HANDLE

The hopper dump handle is located on the hopper and is used for dumping debris. A mechanical interlock prevent s the handle from being moved out of the stowed position

HOPPER DUMP HANDLE

LIFT HANDLE TO DUMP HOPPER

before the filter manifold assembly has been lifted away from the hopper.

T o dump the hopper , disengage the filter latch, lift the manifold assembly then rotate the dump handle out of the stowed position and lift.

T o stow the handle, replace the handle to the stowed position, lower the filter manifold assembly and engage the filter latch.

LIFT HANDLE TO DUMP HOPPER

HOPPER DUMP HANDLE

FORW ARD/REVERSE CONTROL HANDLE

The forward/reverse control handle is located at the rear of the machine. The control handle extending across the rear of the machine activates the belt driven dead-man clutch in the drive system.

R O

T o drive the machine forward, move the control handle forward.

REVERSE

T o drive the machine backward, move the control handle back.

The handle returns to neutral automatically when released.

C0614 FIGURE 10

1-12 American-Lincoln

91 WS

BATTERY

CIRCUIT BREAKERS

CHOKE

CB-1 CB-2

C-1161

OFF

FILTER SHAKER

C116 1 FIGURE 1 1

START

OFF

HOURS

0 0 0 0 0

MACHINE CONTROLS

CIRCUIT BREAKERS

The circuit breakers provide protection for the electrical system and are located on the console. The circuit breaker “POPS” out when an overcurrent condition exists.

When a circuit breaker pops out, the machine must be taken out of service and repaired before the circuit breaker will reset. The circuit breaker may be reset when the overcurrent condition has been corrected.

Push the button in to reset a popped circuit breaker.

REWIND STARTER

The Gas/LP engine is equipped with a rewind starter . If the battery is dead, it may be possible to start the engine with the rewind starter .

P4550 FIGURE 12

Open the top cover to gain access to the rewind starter . T o use the rewind starter:

-Turn key switch to “On” position.

-Grasp the starter , and pull it slowly until the starter engages.

-Pull the cord rapidly enough to overcome compression, prevent kickback and start engine.

American-Lincoln 1 - 13 91 WS

OPERATING INSTRUCTIONS

BA TTERY MACHINE OPERA TION

Charge the batteries after operating the machine. See the battery charging instructions in this manual. Use the pre-start checklist and follow the service chart for daily check points. Read and follow the safety precautions to assure safe, trouble free operation.

WARNING

Lead acid batteries generate gases which can cause an explosion. Keep sparks and flames away from batteries.

NO SMOKING . Charge batteries only in area with good ventilation and always leave the top cover open while

charging batteries. Do not disconnect the charger from the batteries before disconnecting the AC power cord.

Disconnecting the battery cable with the charger plugged in could cause an explosion.

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 the tops of batteries.

GAS/LP MACHINE OPERA TION

See the LP instructions in this manual for fueling and service instructions on the LP fuel system and replacement of tanks. Use the pre-start checklist and follow the service chart for daily check points. Read and follow the safety precautions to assure safe, trouble free operation. Gasoline powered machines use regular grade unleaded gasoline. Turn the engine off before dispensing fuel into the gasoline powered machine.

WARNING

T o prevent possible fire. Never fill fuel tank while the engine is running. Always be sure gasoline container and

sweeper are electrically grounded before dispensing gas. This can be done by permanently attaching an insulated

wire with a battery clip on the end to the gasoline container .

WARNING

All internal combustion engines give off harmful fumes and gases while running. Do not start or run the engine in

an enclosed area where the exhaust gases can accumulate. Avoid breathing these gases as they contain poison-

ous carbon monoxide which can endanger your health or life if inhaled steadily for even a few minutes.

WARNING

Check for gas odor before and during starting operations. If gas odor is noticed, stop and check for leaks or

component malfunctions in the fuel system. Check fuel supply hoses for proper connection and signs of abrasion.

Do not start engine when gas odor is present.

WARNING

Keep cigarettes, sparks and open flame away when working on LP equipment, use caution when inspecting for

gas leaks or when LP tanks are present.

WARNING

Do not run engine in an enclosed area. exhaust gases contain carbon monoxide, an odorless and deadly poison.

Do not operate the engine without adequate ventilation.

1-14 American-Lincoln

91 WS

OPERATING INSTRUCTIONS

ST ARTING INSTRUCTIONS PRE-ST ART CHECKLIST

Before starting the machine, do these pre-start checks.

1. Check all controls for proper operation.

2. Check for loose battery connections.

3. Make sure all controls are “OFF”.

4. Check to be certain that the forward /reverse control handle is centered in the neutral position.

TO ST ART THE BA TTERY POWERED SWEEPER

Perform the pre-start checklist before starting the sweeper .

1. Turn the key switch to the “ON” position.

2. Check the battery condition meter after the machine is on to determine if battery is sufficiently charged. Charge the batteries when the needle stays in the red zone while the machine is being operated

TO ST ART GAS POWERED SWEEPER

Follow these instructions for starting a cold engine. If the engine is warm reduce the initial choke setting in step 1 to halfway out position.

1. Set the choke to the full out position.

2. Turn the key switch to the “ON” position.

3. Push the start button until the engine starts. Do not hold the start button for more than 15 seconds at a

time.

4. After engine starts, gradually push in the choke until the engine runs smoothly.

5. If the engine starts then stalls push in the choke halfway and restart the engine.

6. At temperatures below 50° F (10° C), a one or two minute warm-up may be required.

7. Push the choke control all the way in when the engine reaches normal operating temperature.

TO ST ART LP POWERED SWEEPER

Follow these instructions for starting a cold engine. If the engine is warm reduce the initial choke setting in step 4 to halfway out position.

1. Open the LP storage tank valve.

2. Check all propane components for leaks and physical security. Be sure the tank is securely fastened.

3. Check the regulator. Moment arily press fuel primer on the regulator cover to bleed air out of the system.

4. Set the choke to the full out position.

5. Push the start button until the engine starts. Do not hold the start button for more than 15 seconds at a time.

6. If the engine starts then stalls, push in the choke halfway and restart the engine.

7. At temperatures below 50° F (10° C), a one or two minute warm-up may be required.

8. Push the choke control all the way in when the engine reaches normal operating temperature.

TO ST ART ENGINE USING THE REWIND ST ARTER

The Gas/LP engine is equipped with a rewind starter . If the battery is dead, it may be possible to st art the engine with the rewind starter . Grasp the starter , and pull it slowly until the st arter engages. Pull the cord rapidly enough to overcome compression, prevent kickback and start engine. Repeat if necessary with the choke opened slightly . When the engine starts open the choke gradually to position that allows the engine to run smoothly.

American-Lincoln 1 - 15 91 WS

OPERATING INSTRUCTIONS

TO DRIVE MACHINE FOR TRANSPORT

Use these instructions to drive the machine for transport to the sweeping site.

WARNING

Be careful when operating the machine on a ramp or incline. Always move slowly on a ramp. Do not turn this

machine on a ramp. Do not stop and leave this machine on a ramp.

1. Push the Forward/Reverse control Handle forward to start machine moving.

2. V ary your hand pressure on the control handle to obtain the desired travel speed.

TO SWEEP WITH MACHINE

Follow these steps to sweep with the machine.

WARNING

Machines can ignite flammable materials and vapors. Do not use with or near flammables such as: gasoline, grain

dust, solvents and thinners.

1. Lower the side broom.

2. Move the main broom lever to the sweep position.

3. V ary your hand pressure on the forward reverse control handle to obtain desired travel speed.

4. Empty the hopper when full. The sweeper will start to leave debris on the floor when the hopper fills to capacity.

TO EMPTY HOPPER

Empty the hopper when full. The sweeper may begin to leave a trail of debris while sweeping when the hopper is full. Use the hopper dump handle to empty the hopper. The hopper may be removed for cleaning. Do not attempt to remove the hopper when full. Empty the hopper before removing. Follow these instructions to dump the hopper.

WARNING

T o prevent possible back injury . Do not attempt to dump the hopper if it is too heavy to be lifted by one person. Get

help if needed. Know how to lift safely . Use your legs to do the work while keeping your back straight in an upright

position. Do not bend over and use your back to lift heavy objects.

1. Drive to dump site and position machine on hard level surface. Turn key switch to the “OFF” position.

2. Open the hinged top cover.

3. Disengage the filter manifold latch located on the filter shaker assembly . Apply light down pressure on the corner of the shaker assembly to ease removal of the latches.

4. Lift the hinged shaker assembly away from the hopper .

5. Swing the hopper dump handle to the dump position.

6. Lift the hopper dump handle to empty the hopper .

7. Use the hopper dump handle to return the hopper to the sweep position.

8. Swing the hopper dump handle to the stowed position.

9. Lower the hinged shaker assembly and engage the filter manifold latch. Apply slight down pressure on the corner of the shaker assembly to ease engagement.

10. Close the hinged top cover .

TO STOP SWEEPER

1. Allow the directional control handle to return to the center (neutral) position.

2. Use the side broom lift handle to raise the side broom. Pull out and down to lock the side broom in the raised position.

3. Use the main broom lever to raise the main broom. Move the main broom lever back to the “UP” position and move the lever into the slot provided to hold the main broom in the “UP” position.

4. Turn the key switch to the “OFF” position.

5. Perform the post operation checklist.

1-16 American-Lincoln

91 WS

OPERATING INSTRUCTIONS

POST OPERA TION CHECKLIST

After stopping the machine perform these post operation checks.

1. Check sweeping brooms for wear or damage.

2. Check all flaps for wear, damage or adjustment.

3. Close the supply valve on the LP cylinder. Check the fuel level and install a filled cylinder if needed. ~3. Fill the fuel tank. *3. Charge the batteries.

4. Perform the scheduled maintenance according to the service chart.

- = LP powered machines only . ~= Gasoline powered machines only . * = Battery powered machines only .

BA TTERY CHARGING INSTRUCTIONS

Charge the batteries at the end of each day or when the battery condition meter indicates low battery voltage. The batteries need to be charged when the needle stays in the “red” zone while the machine is being operated. When charging batteries, only use the quick disconnect provided. Use the quick disconnect to insure correct polarity.

Check the liquid level in the batteries a least once a week and add water when low. Use only distilled water . Fill the batteries after charging the batteries to prevent electrolyte from spilling over on to the tops of the batteries during the charging process.

WARNING

The use of an extension cord with the charger should be avoided. Risk of fire and electrical shock is possible if the

wrong type or size extension cord is used. If an extension cord must be used, only use a three conductor number

12 A WG cord with ground, properly wired, in good electrical condition and keep it as short as possible. Locate all

cords so that they cannot be stepped on, tripped over, or otherwise subjected to damage or stress.

WARNING

Verify that the AC power source to which the charger is to be connected is cap able of supplying the current

specified on the charger nameplate.

WARNING

Keep all charger ventilation holes at least 2 inches away from walls or other objects. Do not allow vent holes to

become obstructed.

WARNING

Do not operate charger that has been damaged or shows physical signs of damage. Have charger serviced by a

qualified professional repair person.

WARNING

Lead acid batteries generate gases which can cause an explosion. Keep sparks and flames away from batteries.

NO SMOKING . Charge batteries only in area with good ventilation and always leave the top cover open while

charging batteries. Do not disconnect the charger from the batteries before disconnecting the AC power cord.

Disconnecting the battery cable with the charger plugged in could cause an explosion.

American-Lincoln 1 - 17 91 WS

OPERATING INSTRUCTIONS

TO CHARGE THE MOTIVE POWER BA TTERIES (Battery powered machines only)

1. Read the detailed instructions provided on the charger.

2. Be sure all controls are “OFF” and machine is located in an area with good ventilation.

3. Open the top cover. The top cover must remain open during the charging process.

4. Disconnect the machine power supply cable from the battery using thequick disconnect provided.

5. Connect the charger cable to the battery connector.

6. Plug the charger into properly grounded AC outlet. Be sure to verify theoperating voltage of your charger. The chargers supplied with machine operate at 1 15 V AC @60 HZ or 230 V AC @ 50 HZ.

7. The charger will begin charging the batteries after a short period of time. The charger will shut off automati cally when the charging process is complete.

8. Unplug the charger from the grounded AC outlet before disconnecting the charger from the battery .

9. Disconnect the charger cable from the battery .

10. Check the electrolyte level in the battery after charging. Add distilled water if needed.

1 1. Reconnect the machine power supply cable to the battery cable.

12. Lower the top cover and perform the pre-start checks before operating the machine.

GASOLINE POWERED MACHINE FUELING INSTRUCTIONS

The fuel tank for gasoline powered machines is located on the engine. The top cover must be opened to access the fuel tank. After opening the top cover , observe the combination fuel cap/gas gauge and check the fuel level to determine if the fuel tank needs to be filled.

TO FILL THE GASOLINE POWERED MACHINE FUEL TAN K

WARNING

T o prevent possible fire. Never fill fuel tank while the engine is running. Always be sure gasoline container and

sweeper are electrically grounded before dispensing gas. This can be done by permanently attaching an insulated

wire with a battery clip on the end to the gasoline container .

1. Turn the key switch to the “OFF” position.

2. Open the top cover.

3. Observe the level indicated by the gas gauge on the fuel tank cap.

4. Remove the fuel tank cap from the fuel tank and add gasoline as needed.

5. Install the gas cap and lower the hinged top cover .

LP POWERED MACHINE FUELING INSTRUCTIONS

Fueling the LP powered machine is accomplished by removing the empty LP cylinder and replacing it with a full replacement cylinder. Some cylinders are equipped with a fuel level gauge. Check the gauge and change the cylinder when the gauge reads “EMPTY”. See the LP Instructions in this manual for additional information.

WARNING

Improper filling procedures could cause an explosion. Have your LP cylinders filled by qualified personnel.

WARNING

Park the machine in a safe area designated for changing LP fuel tanks. The designated safe area must have

adequate ventilation, must be free from sparks or other sources of ignition.

WARNING

NO SMOKING signs should be posted and enforced. The area must not be in the vicinity of flammables, combustible

materials or high temperature sources such as furnaces or ovens.

WARNING

Always store and transport LP fuel tanks with the safety relief valve in the up position. This will prevent the tank from venting liquid propane in the event the safety relief valve opens due to overpressure in the tank. A properly

stored tank will only vent gaseous propane which dissipates much faster than liquid propane.

1-18 American-Lincoln

91 WS

OPERATING INSTRUCTIONS

TO CHANGE LP T ANK

The tank changing operation presents an opportunity for the operator to inspect the tank, tank fittings and the fuel lines for damage or wear that could cause leaks in the LP fuel system. Follow these steps to change the LP tank.

1. Park the machine in a designated safe area.

2. Turn key switch to “OFF” position.

3. Close the tank supply valve.

4. Remove the machine fuel supply hose quick disconnect coupling from the tank.

5. Inspect the fuel system components for damage and abnormal wear.

6. Remove the tank from the cradle holding device. Handle the tank carefully . It must not be dropped or

mishandled.

7. Store the empty t ank in the designated storage area.

8. Select a filled LP tank and inspect for damage and abnormal wear .

9. Carefully install the tank so the centering pin aligns with the hole in the tank collar.

10. Fasten the tank hold down clamp so that the tank locks into position. 1 1 . Reconnect the machine fuel supply hose to the tank supply coupling.

12. Open the tank supply valve and inspect for leaks. If leaks are present close the supply valve immediately.

Investigate the source of the leak and have it repaired before using the machine. If no leaks are found, the machine is ready to start.

13. Close the top cover .

14. Close the tank supply valve if the machine is to be stored.

MACHINE STORAGE GASOLINE POWERED MACHINES

Machines to be stored over 30 days should be completely drained of fuel to prevent gum deposits forming on essential carburetor parts, fuel filter and tank.

The use of a fuel additive, such as ST A-BIL, or an equivalent, will minimize the formation of fuel gum deposits during storage. Such an additive may be added to the gasoline in the fuel tank of the engine.

The following procedure should be used to prepare the machine for storage:

1. All fuel should be removed from the tank. Run the engine until it stops from lack of fuel.

2. While engine is still warm, drain oil from the crankcase. Refill with fresh oil.

3. Remove spark plug, pour approximately 1/2 ounce (15 grams) of engine oil into cylinder and crank slowly to

distribute oil. Replace spark plug.

4. Store in a clean and dry area.

BA TTERY POWERED MACHINES

All wet batteries will slowly discharge on standing and will discharge much faster when warm than when cold. At normal temperature of 80°F (26°C) loss of capacity by self-discharge, starting with a fully charged battery , may amount to an average of .001 specific gravity per day over a 30 day period. The battery should be given a booster charge when the specific gravity falls .040.

Do not discharge the batteries excessively . Excessive discharge can cause polarity reversal of the individual cells in the battery which will lead to complete failure of the batteries.

Use a hydrometer to monitor the specific gravity of the individual cells in the batteries. When checking the specific gravity of the batteries, you should not see a large difference between the individual cells. The batteries may need to be replaced if the battery shows a significant difference of specific gravity between the cells.

The specific gravity of the electrolyte should measure 1.285 when fully charged.

American-Lincoln 1 - 19 91 WS

SERVICE CHART

The following is a guide for servicing and maintaining your 91WS Walkbehind Sweeper . For best machine performance, the following operation checks should be made at these intervals. For service assistance, consult your Clarke/American-Lincoln distributor. For best result s, replace worn or damaged parts with genuine Clarke/ American-Lincoln parts.

EVERY 8 HOURS or DAIL Y :

1. Recharge batteries and check electrolyte level. B

2. Check fuel level. G, LP

3. Check engine oil level (at 5 hours). G, LP

4. Clean cooling fins and entire engine. G, LP

5. Check all flaps and gaskets for wear or damage.

6. Check sweeping brooms for wear or damage.

7. Check panel filter (clean side) for dust leak.

8. Check for LPG odor at connections. LP

EVERY 25 HOURS:

9. Change crankcase oil (heavy use). G, LP

10. Clean and re-oil foam pre-cleaner air filter (Dual Element). G, LP 1 1. Check all belts and chains for wear and alignment.

EVERY 50 HOURS:

12. Change crankcase oil (normal use). G, LP

13. Check battery electrolyte level. G, LP

14. Lubricate the caster wheel bearings.

15. Lubricate the drive chains.

EVERY 100 HOURS:

16. Lubricate all moving joints.

17. Clean or replace the spark plug and reset the gap. G, LP

18. Replace fuel filter . G

19. Clean and/or replace engine air filter paper cartridge (dual element). G, LP

20. Remove, clean, inspect, and reinstall battery cable connections.

21. Inspect side broom gear box and repack if necessary.

22. Check all fasteners for tightness.

EVERY 250 HOURS:

23. Remove combustion deposits. G, LP

24. Inspect LP fuel filter and change if needed. LP

Note: Complete service information for the Briggs and Stratton engine is provided in the “ Engine Owners’ Manual” which is supplied as part of this manual. Briggs & Stratton Form No. 272848-1/94

G = GAS LP = LPG B = BA TTERY

1-20 American-Lincoln

91 WS

CB-2

FILTER

SHAKER

BATTERYCONDITION

CHECK

WHILE

OPERATING

OFF

FLOAT

SWEEP

MAIN

BROOM

CB-1

CB-2

FILTER

SHAKER

BATTERYCONDITION

CHECK

WHILE

OPERATING

OFF

FLOAT

SWEEP

MAIN

BROOM

SERVICE CHART

3,9,12

BATTERYCONDITION

CHECKWHILEOPERATING

CB-1

O F F

F I

R S H

A K

R F F

13,20

10,19

11,15

B A T

I L

P E

R A

T I N

G C B

C B

O F F

F I L

R S H

1,20

11,15

C0616

American-Lincoln 1 - 21

91 WS

OPERATING INSTRUCTIONS

SIDE AISLES

MAIN AISLE

P4134/0001

P4134 FIGURE 13

HOW TO SWEEP

The sweeper is intended for use on hard relatively flat surfaces such as cement, asphalt and wood block floors. Exercise care when maneuvering to keep wheels from dropping off curbs or into pot holes. Do not sweep over obstructions.

The sweeper is designed for dry sweeping conditions. Wet clay and muddy type material will adhere to surface of sweepingchamber and hopper. Sweeping performance will degrade if these surfaces are not kept clean. Large heavy objects such as bricks, large stone and iron parts should not be swept. Damage to the main broom or other sweeping system components is possible. String, rope, wire or or metal strapping longer than 18 inches should not be swept. These items have a tendency to wrap around moving parts. This can cause damage or degrade sweeping performance.

SWEEPING GUIDELINES

In actual sweeping, there is no single pattern that can be set forth in the manual. Each installation has its own conditions, and the operator can readily set his own pattern using these guidelines.

1. Pick up large debris and remove bulky cartons from aisles before sweeping.

2. Use the machine to sweep debris from the narrow aisles into the main aisle.

3. After the machine has made a sweeping run, move the main broom lever to the “UP” position and turn the key switch to the “OFF” position. The filter shaker will operate for a short period of time. After the shaker stops, turn the key switch to the “ON” position, lower the main broom to the “SWEEP” position and continue sweeping.

NOTE

Replace main broom when bristles are reduced to 3.75 inch (9.5 cm) length. T o order replacement brooms, see

MAIN BROOM section of this manual. Replace side broom when bristles fail to sweep debris into the path of the

main broom. To order replacement brooms see SIDE BROOM section of this manual.

SWEEPING V ARIOUS TYPES OF DEBRIS

For heavy sand, dirt or excessive scattered debris, travel slowly with machine to allow main broom to deliver best results. Do not expect a completely clean surface on the first pass under these conditions.

Sometimes it is necessary to have extra broom pressure where debris is excessively heavy . See “Main Broom Adjustment” for information on adjusting broom to a “heavy” sweeping pattern. Material that adheres to the sweeping surface: This type of wet or sticky material will require more broom pressure, as in the above paragraph.

1-22 American-Lincoln

91 WS

MAIN BROOM SERVICE INSTRUCTIONS

SERVICE INSTRUCTIONS

MAIN BROOM ADJUSTMENT

TO LOWER BROOM

C0613/9705

C0613 FIGURE 14

MAIN BROOM

T o prevent the main broom from setting in one direction and to provide maximum life of the broom. It is recommended that the broom be turned end for end periodically .

TO CHECK THE MAIN BROOM SWEEP P A TTERN

Check the main broom sweep pattern after changing the broom or when poor sweeping performance is encountered while sweeping.

1. While the machine is not moving, lower the main broom to the “SWEEP” position. Allow the machine to

sweep in one spot for a short period of time.

2. Before moving machine, move main broom lever to the “UP” position and move the sweeper forward until you

can see the pattern left by the main broom bristles on the floor .

3. Check the width of the pattern on the floor to determine if the main broom requires adjustment. The recommended sweep pattern left on the floor will be between 1 and 2 inches wide.

-A pattern that is more than 2 inches wide indicates the broom linkage needs to be adjusted “UP”.

-A pattern that is less than 1 inch wide indicates the broom linkage needs to be adjusted “DOWN”.

TO ADJUST THE MAIN BROOM SWEEP HEIGHT

When changing the sweep height adjustment it is recommended that the bolt be adjusted 1 turn at a time. Af ter adjustment, recheck the sweep pattern to determine if further adjustment is necessary . Locate the Main Broom Height Adjustment which is located at the rear bottom of machine. T urn the adjustment screw as described below.

TO RAISE BROOM

-Turn the adjustment bolt counterclockwise to INCREASE the sweep pattern width.

-Turn the adjustment screw clockwise to DECREASE the sweep pattern width..

WARNING

T o prevent unexpected movement always p ark on a hard, level surface and turn key switch off before working on

the machine.

American-Lincoln 1 - 23 91 WS

SERVICE INSTRUCTIONS

MAIN BROOM SERVICE INSTRUCTIONS-CONT .

C0622 FIGURE 15

TO REPLACE THE MAIN BROOM

The main broom should be replaced when the bristles become worn to less than 2". The main broom is held in place by a single threaded knob. This feature provides for easy removal and installation of the main broom without the need for special tools or equipment. Follow the instructions below for main broom removal and replacement.

1. Park the sweeper on a smooth level surface. Turn the key switch “OFF”. Place the main broom lever in the “SWEEP” position.

2. Gain access to the main broom by opening the broom compartment door located on the left side of the machine.

3. Remove the main broom idler hub [Item 2] by loosening the threaded knob [Item 1] .

4. Grasp the main broom [Item 3] and remove it from the drive hub [Item 2].

5. Insert replacement broom [Item 3] into the broom compartment. Pay special attention to the slots on the broom. It may be necessary to rotatethe broom so the tabs on the drive hub align with the slots on the broom.

6. Reinstall the idler hub [Item 2] to the broom and over the locator stud [Item 4] and screw provided for the threaded knob [Item 1].

7. Install the threaded knob and close the broom door and engage the door latch.

8. Re-Check main broom sweep pattern.

1-24 American-Lincoln

91 WS

FLOOR CONTACT AREA

SIDE BROOMS SERVICE INSTRUCTIONS

SERVICE INSTRUCTIONS

FLOOR CONTACT AREA

C0621

FLOOR CONTACT AREA

C0621 FIGURE 16

SIDE BROOMS

The side broom’s sweeping angle is not adjustable, however the height of the side brooms can be adjusted to compensate for wear as the brooms become worn from use. Open the top cover and turn the adjustment nut to vary the side broom sweep height .

TO CHECK THE SIDE BROOM SWEEP P A TTERN

1. Position the machine on a smooth level surface.

2. Place the side broom lift lever in the “DOWN” position.

3. While staying in place allow the side brooms to sweep for a short period of time. (Allow enough time for the

side brooms to leave a clean footprinton the floor).

4. Place the side broom lift lever in the “UP” position.

5. Back the sweeper away from the area where the pattern was left.

6. Turn Key Switch to the “OFF” position.

7. Check the pattern to determine the floor contact area.

8. Determine if sweep height adjustment of the side brooms is necessary by comparing the floor contact area

to the diagram in Figure 16.

TO CHANGE THE SIDE BROOMS HEIGHT ADJUSTMENT

Adjust the side broom height to compensate for normal wear of the side brooms or when installing a new replacement broom.

1. Park machine on a smooth level surface, turn keyswitch to “OFF” position.

2. Place the side broom lift lever in the “DOWN” position.

3. Open the top cover and locate the adjustment nut on the end of the lift rod. (See Figure 17)

4. Adjust the nut so the broom cont act s the floor as shown. (See Figure 16)

C0623

C0623A FIGURE 17

American-Lincoln 1 - 25 91 WS

SERVICE INSTRUCTIONS

TO CHANGE THE SIDE BROOMS

Change the side brooms when the bristles become worn to less than 3 inches length.

1. Park machine on a smooth level surface, turn key switch to “OFF” position.

2. Place the side brooms lever in the “DOWN” position.

3. Remove the pin that passes through the flange and motor shaft. Remove the broom.

4. Remove the three (3) 1/4 inch bolts and nuts that hold the broom to the motor flange.

5. Assemble the flange to the replacement broom and fasten using the hardware removed in step 4.

6. Install broom to motor shaft with the pin removed in step 3.

7. Check sweep pattern and perform height adjustment so the broom contacts the floor as shown (See Figure

16).

DUST CONTROL SERVICE INSTRUCTIONS

The dust control system consists of the filter baffle and a panel filter . The filter baffle is built in to the hopper and should be checked/cleaned when the hopper is being emptied. The panel filter is located on top of the hopper under the hinged manifold. The panel filter must be replaced if the filter media tears. Inspect the top of the panel for signs of dirt that may be escaping through tears in the filter media.

TO CLEAN THE FIL TER BAFFLE

The filter baffle should be cleaned as a first step when the dust control system fails to effectively control dusting while sweeping.

1. Park the sweeper on a smooth level surface, Turn the key switch to the “OFF” position.

2. Open the top cover and disengage the filter manifold latch.

3. Lift the hinged manifold to gain access to the panel filter .

4. Remove the panel filter and inspect for debris lodged in the baffle passages.

5. Dislodge all debris from the baffle manually or with compressed air not to exceed 100 PSI.

6. Install the panel filter . Lower the manifold over the filter and engage the latch.

7. Close the top cover .

TO CLEAN THE P ANEL FIL TER

Clean the panel filter when the shaker fails to adequately clear the filter pleats.

1. Park the sweeper on a smooth level surface, Turn the key switch to the “OFF” position.

2. Open the top cover and disengage the vacuum manifold latch.

3. Lift the hinged vacuum manifold to gain access to the panel filter .

4. Remove the panel filter and inspect for damage. Replace if not in serviceable condition.

5. Apply compressed air not to exceed 100 PSI to the top side of the panel to backflush lodged dirt from the filter media. The filter may also be cleaned with a solution of soap and water . If this method is used, do not use the panel filter until it has completely dried.

6. Reinstall the cleaned filter and lower the hinged manifold assembly over the filter .

7. Engage the manifold latch and close the top cover .

TO CHANGE THE P ANEL FIL TER

Change the filter when obvious damage is evident. Inspect for leakage or a heavily loaded filter to the point that cleaning and shaking of the filter has no effect on clearing the pleats.

1. Park the sweeper on a smooth level surface, Turn the key switch to the “OFF” position.

2. Open the top cover and disengage the vacuum manifold latch.

3. Lift the hinged vacuum manifold to gain access to the panel filter .

4. Remove the panel filter and install a new replacement panel.

5. Lower the hinged manifold assembly over the filter.

6. Engage the manifold latch and close the top cover .

1-26 American-Lincoln

91 WS

SERVICE INSTRUCTIONS

FLAP SERVICE INSTRUCTIONS

The flaps are very important to the sweeping process. Inspect the flaps daily and replace any flap that shows signs of wear or deterioration. The side flaps are adjustable and should be adjusted so there is a recommended 1/16" to 1/8" gap between the floor and the bottom edge of the flaps. The adjustable flaps have slotted mounting holes to facilitate adjustment. The recycling flap is also adjustable and should be adjusted so the flap touches the broom. All other flap s require no adjustment and should be replaced when worn or damaged.

TO ADJUST THE SIDE FLAPS

1. Park machine on a smooth level surface. Turn the key switch to the “OFF” position.

2. Loosen the flap retaining screws and adjust the flap to clear the floor and leave a 1/16" to 1/8" gap.

3. Tighten flap retaining screws while holding flap in position.

HOPPER SERVICE INSTRUCTIONS

The hopper houses the debris compartment, the dust control filter and the removable dust baffle. For maximum performance and service life, keep the hopper clean and inspect the seals and flaps daily . Clean the hopper prior to parking the sweeper at the end of the day . A clean hopper will make inspecting the flap s and seals much easier and will prevent premature deterioration of hopper components. Do not leave the hopper full of debris while in storage or when parked for extended periods of time.

TO CLEAN HOPPER

Once the hopper has been emptied, the insides of the hopper should be rinsed out with water and allowed to dry completely.

TO CHECK HOPPER SEALS

The hopper seals are important to positive dust control while sweeping. Damaged seals will reduce vacuum pressure at the broom. Inspect for cuts, tears and proper positioning of the seal material. Replace all seals that become damaged.

BA TTERY SER VICE INSTRUCTIONS (Battery powered machine only)

Install the batteries as shown on page 7 and make sure all connections are wrench tight. A film of Vaseline will help prevent corrosion at the battery connection. Do not replace the electrolyte in the batteries if they have been in service for more than a week.

Charge the batteries when the battery condition meter stays in the red zone while the machine is being operated.

DISTILLED WATER

Read the safety precautions and follow the instructions for charging the batteries on page 18.

FILL TO 1/4 INCH

FROM BOTTOM OF TUBE

1/4 INCH (6mm)

Check the liquid level in the batteries weekly . The liquid level must be checked after the batteries have been charged since the level may rise during the charging cycle.. Add distilled water to bring the level up to a 1/4" below the fill tube as shown in Figure 18.

P4074 FIGURE 18

American-Lincoln 1 - 27 91 WS

SERVICE INSTRUCTIONS

ENGINE SERVICE INSTRUCTIONS

PRE-CLEANER

CARTRIDGE

VER

SCREWS (2)

RETAINER

C-0617

COVER

TAB

SLOT

BASE

C0617 FIGURE 19

WARNING

To prevent accident al st arting, remove sp ark plug wire when servicing engine or equipment. Disconnect the

battery at the negative terminal if the engine has an electric starting system.

NOTE

Check the oil level regularly. Be sure correct oil level is maint ained. Check every five (5) hours or daily before

starting the engine.

NOTE

Check the oil per the Service Chart Instructions previously listed. Change the oil after the five (5) hours of opera-

tion. Change the oil while the engine is warm. Refill with new oil of a recommended grade.

ENGINE AIR INTAKE SERVICE

1. Loosen the cover screws. Remove the cover and air cleaner assembly from the base.

2. Remove the air cleaner assembly from the inside of the cover and disassemble.

3. T o service the pre-cleaner , wash in a liquid detergent and water . Squeegee dry in a clean cloth. Saturate the pre-cleaner in engine oil and use a clean, absorbent cloth to remove ALL EXCESS oil. If the pre-cleaner is very dirty or damaged, replace it.

WARNING

Do not use petroleum solvents, e.g. kerosene, nor pressurized air , to clean the cartridge. Solvents will cause the

cartridge to deteriorate. Pressurized air can damage the cartridge.

4. Reassemble the retainer on the pre-cleaner and cartridge (screen side of pre-cleaner toward cartridge pleats). Install this assembly in cover .

5. Insert tabs on cover into slots in base. T ighten cover screws securely .

FUEL FIL TER SERVICE

The engine is equipped with an in-line fuel filter. As the in-line fuel filter is disposable, the only service required is replacement every 100 hours. For more information regarding the fuel filter system, refer to the Briggs & Stratton Owner’s Manual included with this Operator’s Manual.

1-28 American-Lincoln

91 WS

SERVICE INSTRUCTIONS

TO CHECK THE ENGINE OIL LEVEL

Be sure the correct engine oil level is maintained by checking the oil level daily . Use the dip stick to verify the correct oil level and add oil as indicated on the dipstick. When changing the oil you must first remove the drain plug which is located on the rear of the engine. Refer to the Briggs & Stratton Engine Owners’ Manual for more information on recommended type and grade of oil to be used.

C06241

C0624A FIGURE 20

DRIVE SYSTEM SERVICE INSTRUCTIONS TO ADJUST THE NEUTRAL SETTING

The only item that should have to be moved is the linkage rod itself. By adjusting the clevisis in or out, one should be able to achieve neutral when you install the new belt or if the machine begins to creep.

TO REPLACE THE FORW ARD DRIVE BEL T

1. Remove the two (2) inspection plugs on the right hand side of the machine which allows access to the

bearing plate on the end of the differential.

2. Reach in through the inspection holes and remove the two (2) bolts that hold the differential bearing plate in.

Remove and retain hardware.

3. Loosen the chain idler pulley and move it to the top of the slot to relax all tension on the chain. Retighten

the idler.

4. Remove the drive wheel chain by walking it off the differential. With the idler out of the way, it should all you

plenty of clearance to come off the end of the differential.

5. Move the bearing plate in an upward position to give you clearance for installing the new belt.

6. Begin by working the forward drive belt around the bearing plate. Once this is around the bearing plate, the

reverse belt off the differential shieve and leave it lay off to the left hand side of the shieve.

7. T ake the main forward belt and work it back around the forward idler underneath the main drive shieve and

around the rear of the forward and reverse idler pulley and up over the forward and reverse idler pulley.

8. When installing the forward drive belt, one side of the belt is printed and says “This Side Out”. On the

forward drive belt, you want to have that so you cannot read it when it is installed. It will be riding against the shieve itself on the differential because the machine is driven off the backside of that belt.

9. Once that main forward drive belt is installed and routed correctly , reattach the reverse belt the same way it

was routed before.

10. At the front of the machine, refasten the bearing plate on the end of the differential to the frame. 1 1. Start you chain back around the differential and readjust the idler for the drive chain.

12. Any fine adjustments for neutral that need to be done should be done with the linkage rod only.

American-Lincoln 1 - 29 91 WS

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