American
12
Operator's
Manual
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 ALTO
machinecouldresultininjurytoyouortootherpersonnel;damagetothemachineortootherproperty
could occur as well. You must have training in the operation of this machine before using it. If
operator(s) cannot read this manual, have it explained fully before attempting to operate this
machine.
Si Ud. o sus operadores no pueden leer el Inglés, se hagan explicar este manual completamente
antes de tratar el manejo o servicio de esta máquina.
All directions given in this book are as seen from the operator’s position at the rear of the machine.
For new books write to: ALTO U.S. INC., 2100 Highway 265, Springdale, Arkansas 72764.
FormNo.78150C 6/01
AMERICANSANDERSTECHNOLOGY
Printed in the U.S.A.
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OPERATOR SAFETY INSTRUCTIONS
WARNING
AVERTISSEMENT
ADVERTENCIA
DANGERmeans:
WARNINGmeans:
CAUTIONmeans:
Severe bodily injury or death can occur to you or other personnel if the
DANGER statements found on this machine or in this Owner's Manual are
ignored or are not adhered to. Read and observe all DANGER statements
found in this Owner's Manual and on your machine.
Injury can occur to you or to other personnel if the WARNING statements
found on your machine or in this Owner's Manual are ignored or are not
adhered to. Read and observe all WARNING statements found in this Owner's
Manual and on your machine.
Damage can occur to the machine or to other property if the CAUTION state-
ments found on your machine or in this Owner's Manual are ignored or are not
adhered to. Read and observe all CAUTION statements found in this Owner's
Manual and on your machine.
DANGER:
Failure to read the Owner's Manual prior to operating or attempting any service or mainte-
nance procedure to your American Sanders Technology 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.
DANGER:
Sanding/finishing wood floors can create an environment that can be explosive. The
following safety procedures must be adhered to:
•
Cigarette lighters, pilot lights and any other source of ignition can create an explosion
when active during a sanding session. All sources of ignition should be extinguished or
removed entirely if possible from the work area.
•
Work areas that are poorly ventilated can create an explosive environment when certain
combustible materials are in the atmosphere, i.e., solvents, thinners, alcohol, fuels,
certain finishes, wood dust and other combustible materials. Floor sanding machines
can cause flammable material and vapors to burn. Read the manufacturer's label on all
chemicals used to determine combustibility. Keep the work area well ventilated.
•
•
Spontaneous combustion or an explosion can occur when working with sanding dust.
The sanding dust can ignite and cause injury or damage. Sanding dust should be
disposed of properly. Always empty the sanding dust into a metal container that is
located outside of any building(s).
Remove the contents of the dust bag when the bag is 1/3 full. Remove the contents of
the dust bag each time you finish using the machine. Never leave a dust bag unattended
with sanding dust in it.
•
•
Do not empty the contents of the dust bag into a fire.
Hitting a nail while sanding can cause sparks and create an explosion or fire. Always
use a hammer and punch to countersink all nails before sanding floors.
DANGER:
Operating a machine that is not completely or fully assembled could result in injury or
property damage. Do not operate this machine until it is completely assembled. Keep
all fasteners tight. Keep adjustments according to machine specifications.
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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DANGER:
Electrocution could occur if the machine is used on a power circuit that repeatedly trips or is
undersized. Have a licensed electrician check the fuse, circuit breaker or power supply.
DANGER:
Electrocution could occur if maintenance and repairs are performed on a unit that is not
properly disconnected from the power source. Disconnect the power supply before attempting
any maintenance or service.
DANGER:
DANGER:
DANGER:
Electrocution could occur if machine is used on ungrounded electrical circuit. Never remove
or disable the grounding supply conductor on the electrical cord. Consult an electrician if the
grounding conductor is missing or if you suspect your circuit is not grounded properly.
Use of this machine with a damaged power cord could result in an electrical shock. Do not
use the machine if the power cord is damaged. Do not use the electrical cord to move the
machine.
Electrocution or injury could occur if the power cord is run over or damaged by the sander.
Keep the cord free from under the machine to avoid contact with the sandpaper. Always lift
the power cord over the machine.
DANGER:
DANGER:
DANGER:
WARNING:
Moving parts of this machine can cause serious injury and/or damage. Keep hands, feet and
loose clothing away from all moving parts of the sander.
Operating a sander without all guards, doors or covers in place can cause an injury or damage.
Always check to make sure that all of the guards, doors and covers are secure and in place.
Injury to the operator or bystanders could occur if the power supply remains connected when
servicing the equipment, changing the abrasive, or emptying the dust bag.
Failure to read and observe all safety statements found on your machine or in this Owner's
Manual can result in serious injury or damage. Read and observe all safety statements. Make
sure that all labels, decals, warnings, cautions, and instructions are fastened to the machine.
Get new labels from your authorized American Sanders Technology distributor.
WARNING:
Sanding dust can be airborne and can be breathed in while operating a sander. Always wear
a dust mask while operating sanding equipment.
WARNING:
Injury to the eyes and/or body can occur if protective clothing and/or equipment is not worn
while sanding.
Always wear safety goggles, protective clothing, and a dust mask while
performing any sanding operation.
WARNING:
Bodily injury could occur if power is applied to the machine with the power switch already in
the "ON" position. Always check to assure that the power switch is in the "OFF" position
before applying power to the power cable.
CAUTION:
Maintenance and repairs performed by unauthorized personnel could result in damage or
injury. Maintenance and repairs performed by unauthorized personnel will void your warranty.
Servicing of this unit must always be referred to an authorized American Sanders Technology
distributor.
CAUTION:
CAUTION:
CAUTION:
CAUTION:
Use of this machine to move other objects or to climb on could result in injury or damage. Do
not use this machine as a step or furniture. Do not ride on this machine.
Damage could occur to the machine if not properly kept in a dry building for storage. Store
the machine in a dry building.
The machine is heavy. When transporting the machine, remove the motor. Get help to lift
the machine and motor.
Serious damage to the floor can occur if the machine is left running in one spot while the
sanding drum is in contact with the floor. To avoid damage to the floor, feather cut in at a normal
sanding rate. Do not dwell while lowering or raising the contact wheel. Always sand at a
constant rate.
Page
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OperatingControls
Introduction and Machine Specifications
Operating Controls
Motor Starter / Protector
Sanding Pressure Adjustment
Tool Storage Tray
Leveling Adjustment
PART NUMBER
07044C
07108A
07049C
07109A
AbrasiveSize
12 x 261/8 (30.5cmx67.3cm) paperback
2000/2400 rpm (revolutions per min.)
3796/4555 sfm (surface feet per min.)
5000 rpm (revolutions per minute)
280 cfm (cubic feet per minute)
Contact Wheel Speed
AbrasiveSpeed
Dust Fan Speed
Dust Fan Flow
Motor
60 Hz 230V 4hp (3 kW)
50 Hz 240V 3hp (2.2 kW)
LevelingControl
Operating Control
Motor Starter/Protector
SandingPressureAdjustment
Wheels (Front)
Wheel (Adjustment)
Drive
Externally Adjustable
Adjustable Lever
Magnetic Circuit Breaker
Infinitely Adjustable
Steel
Steel
Urethane
Canvas
Steel
Steel
Urethane
Canvas
V-Belt
3
Dimensions
40½ x 15 x 36 /4 (102.9cm x 38.1cm x 93.3cm)
Weight
240 lbs. (98 kg)
CAUTION: Your equipment may be inappropriate on some installations. Some softer
woods used in flooring cannot support the pressure created by hard wheels.
A felt or rubber wheel should be used when these woods are encountered.
See parts list for optional wheels.
Always consult with the flooring manufacturer on the proper installation,
preparation, and finishing of their product. Determine suitability of your
equipment in preparing the product.
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5
230V Electrical Connection Instructions
CAUTION: This machine will operate only on AC frequency and on electrical voltage shown on the
motor nameplate. Make sure you have the correct frequency and voltage before
connecting the power cord to an outlet. The machine has a plug as shown below.
Thismachinemustbeconnectedtoanelectricallygroundcircuitinordertoprotecttheoperatorfromelectricshock.
Thismachinehasanapprovedpowercordwiththreeconductorsaswellasaplugwiththreeterminals. Connectthe
plug into a three holed receptacle. For maximum protection against electric shock, use a circuit that is protected
by a ground fault circuit interrupter.
DANGER:
DANGER:
Electrocution could occur if the machine is exposed to water or rain. Keep the machine
in a dry building.
Electrocutioncouldoccurifmachineisimproperlyconnectedtotheelectricalsystem. To
prevent possible electric shock, always use a 3 wire electrical system connected to an
electrical ground. For maximum protection against electrical shock, use a circuit that
is protected by a ground fault circuit interrupter. Consult your electrical contractor.
DANGER:
Electrocution could occur if the ground pin is tampered with in any way. Do not cut,
remove, or break the ground pin. Do not try to fit a three terminal plug into a receptacle
orconnectorbodyotherthanathreeplugreceptacleorconnectorbody. Iftheoutletdoes
not fit the plug, consult your electrical contractor.
DANGER:
Electrocution could occur if the machine is used with a damaged plug or power cord. If
the cords or plugs are worn or damaged in any way, have them replaced by an authorized
service person or electrician.
ExtensionCords
Use only an approved three-pronged extension cord with two main conductors and one earthing conductor. This
machine’spowercordhasawiresizeof10gauge. Thismachineisequippedwitha100'power cord. Whengreater
rangeisneededfollowthetablebelowtodeterminecableguageofadditionalfootage. Refertothefollowingchart
forextensioncordinformation.
Feet/Wire Guage (Stranded Copper)
Source Voltage
0
100'
100 250'
Use Voltage
Booster
208
6
230
10
8
If motor appears to labor or takes a considerable longer time to come up to speed reduce sanding pressure.
Page
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How to Transport the Machine
WARNING: The machine is heavy. Remove
the motor from the machine
before transporting. Get help
loading the machine and motor.
To transport the machine, follow this procedure:
1. Make sure the power cable is disconnected from
the electrical outlet.
2. Disconnect the handle plug connection. See
figure1.
3. Removethebeltcover.
4. Removethefanbelt.
Figure1
5. Loosen the motor bolt. Using the ¾" wrench, turn
the motor bolt counterclockwise. See figure 2.
6. Slide the motor forward.
7. Remove the drive belt.
8. Remove the motor from the chassis.
To re assemble the machine after transporting,
follow this procedure:
1. Reposition motor on chassis.
2. Install the drum belt. Slide the motor back until
adequate tension is achieved in belt.
CAUTION: To prevent damage to the floor
surface, make sure the drive
belt is tight.
Figure2
3. Resecure the motor to the chassis.
4. Install the fan belt.
5. Install the belt cover.
6. Reconnect the handle plug.
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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Machine Set Up
To set-up your machine follow this procedure:
1. Familiarize yourself with the machine and read all
danger, warning and caution statements. Make
sure all operators of this machine have read this
Owner's Manual. If they cannot read English,
havethemanualexplainedfullybeforeallowing
anyone to operate the sander.
2. Locate the power supply. The receptacle should
be compatible with the plug. The receptacle must
be grounded and must be fused (30 amp) to avoid
an electrical hazard.
3. Clip the dust bag to the elbow. Cross the strings
on the dust bag and draw tight over the flare on
the elbow. Wrap the string around the elbow and
secure.
4. Wind the power cord through the cable arm.
Keep the power cord out of path of equipment.
How To Install The Abrasive
WARNING: Disconnect power before
changing abrasive.
To install the abrasive, follow this procedure:
1. Prepare abrasive with template supplied.
2. Place backing of abrasive on the template. The
template is marked "This Side Up." Make sure
the marked side of the template is facing up.
3. Cut the abrasive to the exact lenght of the tem-
plate.
4. Align one edge of the abrasive with a notch in the
template.
5. Fold the other end of the abrasive over the end of
the template and crease.
6. Repeat steps 4 and 5 for remaining notch.
7. Lift the drum cover.
Page
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8. Put the smooth side of the abrasive against
the sanding drum.
9. Put one end of the abrasive against the
sanding drum slot (1). See figure 3.
10. Turn the drum one revolution. Put the other
end of the abrasive in the drum slot (2).
See figure 3.
11. Tighten the abrasive.
To tighten the abrasive, follow this procedure:
1. The end wrenches are given with the
machine. Put a wrench around the nut
at each end of the durm (1).
See figure 4.
Figure3
2. Make sure the flat sides of the nuts
are parallel with the drum slot.
3. Turn the wrenches the opposite rotation
until the abrasive is tight against the
drum (2). See figure 4.
12. Remove the end wrenches.
13. Close the cover.
NOTE: When using #4 or 4½ grit abrasive,
removethelargegrainsfromthefolded
ends. To remove the grains, rub the
foldedendstogether.
Figure4
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How to Operate the Machine
DANGER:
Sanding/finishing wood floors
can create an environment that
can be explosive. Cigarette
lighters, pilot lights and any
other source of ignition can
create an explosion when
active during a sanding session.
All sources of ignition should be
extinguished or removed en
tirely if possible from the work
area.
DANGER:
Work areas that are poorly
ventilated can create an explo
sive environment when certain
combustible materials are in the
atmosphere, i.e., solvents,
thinners, alcohol, fuels, certain
finishes, wood dust and other
combustible materials. Floor
sanding machines can cause
flammable material and vapors
to ignite. Read the manufac
turer's label on all chemicals
used to determine combustibil
ity. Keep the work area well
ventilated.
DANGER:
DANGER:
Sanding dust can spontaneously
ignite and cause an injury or
damage. Sanding dust should
be disposed of properly. Always
empty the sanding dust into a
metal container. Remove the
contents of the dust bag when
the bag is 1/3 full.
Sanding dust can spontaneously
ignite and cause an injury or
damage. Remove the contents
of the dust bag each time you
finish using the machine.
Always dispose of the dust in a
metal container located outside
of the building. Never leave a
dust bag unattended with
sanding dust in it. Do not empty
the contents of the dust bag into
a fire.
DANGER:
Hitting a nail while sanding can
cause sparks and create an
explosion or fire. Always use a
hammer and punch to counter
sink all nails before sanding
floors.
Page 10
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To operate the machine follow this procedure:
1. Install the operator's belt as follows:
a. Position the operator's belt around waist.
b. Cross the straps at the waist. See figure 5.
c. Slide the belt loop end over the handle on the
control lever side. Adjust the length as
needed.
d. Wrap the remaining strap around the oppo-
site side of the handle and hold it in place
with your hand.
WARNING:
Should quick release of the ma
chinebenecessary, seriousop
erator injury could occur if the
operator has tied the loose end
oftheoperator'sbelt straptothe
machine. Always position the
strap so that you can let go and
get away quick in case of bag
fire or explosion.
Figure5
2. Put the On/Off switch into the "ON" position.
DANGER:
Serious damage can occur to
the floor surface if the machine
is not in motion while the con
tactwheelisrunningonthefloor
surface. To prevent damage to
the surface, make sure the ma
chine is always moving when
the contact wheel is in contact
with the floor.
3. Work right to left. For each forward pass, move
the machine 4" over the pass you have just
finished. Retrace your reverse path without
overlapping. See figure 6.
4. Feather-cut in by easing the contact wheel down
onto the surface with the control lever while the
sander is in motion.
5. When contact wheel is fully engaged with the
surface, gradually adjust your pace for adequate
finish removal. Keep sander in motion while the
contact wheel is engaged with the surface or
dwell marks will occur.
6. Move the machine in the direction of the grain in
the wood whenever it is possible. Sand the
surface at a constant pace.
8. Empty dust bag whenever it is 1/3 full. Never
leave a dust bag unattended with sanding dust in
it. Sanding dust can spontaneously ignite and
cause a fire or explosion. Empty dust into a
metal container located outside of the building.
7. Gradually feather-cut out at the termination point
(the end of your pass) by easing the contact
wheel up with the control lever. Stagger the
termination points for a better blend when
edging.
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rd,
E. Work the remaining unsanded floor in the
same fashion, right to left.
Figure 6
Page 12
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Sanding Cuts and Sandpaper
InitialCut
The purpose of the initial cut is to remove old finish and gross imperfections on the floor surface. The sanding
equipment should be adjusted to heavy sanding pressure setting and a coarse abrasive should be used. If the
surface is severely damaged by deep scratches, pre-existing dwell marks, uneven planks, etc., it may be
necessary to sand across or diagonally to the grain to restore evenness to the surface. If these conditions are
not present, the initial cut should be done in the direction of the grain.
If glazing, loading, or burning takes place immediately into an initial cut, select a coarser abrasive. If this
should occur during an initial cut, the abrasive has dulled and must be replaced.
Final Cuts
The purpose of a finishing cut is to remove the scratches produced during the initial cut. Use a fine (60 - 80
grit) grain abrasive and a reduced sanding pressure setting.
If the surface remains rough after a finishing cut, it may be necessary to use an even finer grain of abrasive (80
- 100 grit). Care should be taken in selecting the grit size of the abrasive. A very fine grain will close the
pores on a wood floor making admission of a stain difficult.
If glazing or burning should occur immediately into a finishing cut, reduce the sanding pressure. If it should
occur during a finishing cut, the abrasive has dulled and must be replaced.
Abrasive Bulk Roll
Note: All part numbers listed are for 12" x 50' (30.5 cm x 18m)
Grain
Use
Part No.
12 grit
16 grit
20 grit
24 grit
945516
945517
945518
945519
Forremovinggrossimperfectionsandrestoreevenness
to old flooring. To remove build-up of paints and varnishes.
30 grit
36 grit
For first sanding of new flooring (maple, oak). For removing
minor imperfections and finishes from old flooring.
945520
945521
40 grit
50 grit
For first sanding of new flooring (oak, walnut). For removing
minor imperfections and finishes from old flooring.
945522
945533
For first sanding of new flooring (cedar, pine, fir)
For clean-up of 16 grit.
60 grit
80 grit
For clean-up from initial cut 36 - 40 grit.
945544
945545
For final sanding of certain hardwoods. For clean-up
of initial cuts (50 grit).
100grit
For final sanding of certain hardwoods where a smooth
surface is desired.
945546
120grit
150grit
For final sanding of certain conifers.
945547
945548
For final sanding of certain conifers where a smooth
surface is desired.
180grit
For surface roughing between coats of finish.
945549
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Sander Adjustment Procedures
DANGER:
Electrocution could occur if main-
tenanceandrepairsareperformed
onaunitthatisnotproperlydiscon-
nectedfromthepowersource. Dis-
connect the power supply before
attemptinganymaintenanceorser-
vice.
DANGER:
Moving parts of this machine can
cause serious injury and/or dam-
age. Keep hands, feet and loose
clothingawayfromallmovingparts
of the sander.
Sanding Pressure
To adjust the sanding pressure follow this procedure:
1. Screw the sanding pressure knob down to in-
crease the sanding pressure when making the
roughing in cut.
2. Screw the sanding pressure knob up to decrease
the sanding pressure when making the finishing
cut.
Drum Rates
The machine can be operated at two rates. To
change the speed of the drum, follow this procedure:
1. Remove the belt cover.
2. Remove the fan belt.
3. Loosen the motor bolt.
4. Slide the motor forward.
5. For high drum rates, install drive belt in larger
diameter of the grooves available on the motor
pulley and in the smaller diameter of the two
grooves available on the drum pulley. For lower
rates, install drive belt in smaller diameter of the
grooves available on the motor pulley and in the
larger diameter of the two grooves available on the
drum pulley.
6. Tighten belt and secure motor to chassis.
7. Install the fan belt.
8. Install the belt guard.
Page 14
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Leveling
If the sanding drum is out of adjustment, follow this
procedure:
1. Remove the belt cover.
2. Loosen the eccentric lock screw. Using the 7/16"
wrench, turn the eccentric lock screw (1) counter-
clockwise. See figure 7.
3. To raise or lower the drum, turn the eccentric (2).
See figure 7.
4. Tighten the eccentric lock screw. To tighten the
eccentric lock screw, turn the screw clockwise.
5. Install the belt cover.
Figure7
How to Lubricate the Wheel Pivots
NOTE: The wheel pivots must be lubricated after
every 25 hours of use.
To lubricate the wheel pivots, follow this procedure:
1. Put the machine on its side.
2. Lubricate the pivots. The pivots are behind the
truck wheels. See figure 8.
3. Put the machine on its wheels.
Operating Control
Figure8
To increase the travel or extend the reach on the grip
control follow this procedure:
1. Loosen the locknut on the control rod.
See figure 9.
2. Screw the control rod adjuster in until the desired
reach is found.
3. Tighten the locknut.
To decrease the travel or reduce the reach on the
grip control follow this procedure:
1. Loosen the locknut on the control rod.
See figure 9.
2. Screw the control rod adjuster out until desired
Figure9
reach is found.
3. Tighten the locknut.
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Routine Maintenance
The following items need to be periodically inspected
and maintained to keep your sander in good working
condition.
Wheels
Periodically remove the debris from the truck and
caster wheels. Debris can cause waves on a sanded
surface. Lubricate truck mechanism every 25 hours of
use. The machine is equipped with lubrication fittings
and are located on shaft supporting mechanism.
DustBag
Remove the dust bag from the machine and shake it
thoroughly to remove the sanding dust from the dust
bag. Turn the dust bag inside out and machine wash
in cold water to prevent pore blockage and loss of
dustrecovery.
Drive Belt
Periodically check the drive belt tension.
Bearings
Periodically check the bearings for wear or damage
according to the following schedule:
Idlerpulley
Fan shaft
Arbor shaft
Motor shaft
after 1st 1500 hrs.
after 1st 2500 hrs.
after 1st 5000 hrs.
after 1st 5000 hrs.
Page 16
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Troubleshooting
PROBLEM
ACTION
CAUSE
Drive belts slip.
Insufficienttension.
Worn belts.
Tensiondrivebelt.
(Squeakingorsquealingsound)
Replacebelts.
Squealing, growling or grinding
noisecomingfrommachine.
Damagedand/orwornbearing.
Remove drive belts, rotate arbor
motor, fan, shafts and idler pulley to
locatedraggingorroughbearing.
Contact an authorized American Sanders
Technologydealer.
Dust pick up is poor.
Motor will not start.
Dust bag is over 1/3 full.
Dust bag is dirty.
Empty contents of bag.
Shake debris from bag and wash.
Remove fan cover and clear throat.
Dust chute is obstructed.
Defective motor starter.
Defective start capacitor.
Defective electronic start switch.
Low voltage from poor connection.
Defectivemotor.
Contact an authorized American Sanders
Technologydealer.
Contact an authorized American Sanders
Technologydealer.
Contact an authorized American Sanders
Technologydealer.
Contact an authorized American Sanders
Technologydealer.
Contact an authorized American Sanders
Technologydealer.
Nopower.
Check power supply and connections.
Motorrunssluggishly.
Low voltage from excessive footage,
undersized extension cord, or poor
connection.
Locate power source nearer to work site.
Decrease sanding pressure.
Defectiveruncapacitor.
Contact an authorized American Sanders
Technologydealer.
Defectivemotor.
Contact an authorized American Sanders
Technologydealer.
Motor starter trips/repeatedly
trips.
Excessiveload.
Contact an authorized American Sanders
Technologydealer.
Defective electronic start switch.
Defective motor starter.
Low voltage from poor connection.
Defectivemotor
Contact an authorized American Sanders
Technologydealer.
Contact an authorized American Sanders
Technologydealer.
Contact an authorized American Sanders
Technologydealer.
Contact an authorized American Sanders
Technologydealer.
Defectivecapacitor.
Contact an authorized American Sanders
Technologydealer.
Uneven cut.
Levelingoutofadjustment.
Readjustleveling.
Burning or glazing.
Dullabrasive.
Excessive sanding pressure.
Too fine of an abrasive.
Replaceabrasive.
Decrease sanding pressure setting.
Use coarser abrasive.
Slowcutting.
Dullabrasive.
Too fine of an abrasive.
Insufficientsandingpressure.
Replaceabrasive.
Use a coarser abrasive.
Increasesandingpressuresetting.
Waves on sanded surface.
Debris on wheel.
Flat spot on tire(s).
Remove and clean wheels.
Replace tires.
Chatter marks on sanded
Drum out of round.
Drumvibration.
Contact an authorized American Sanders
Technology dealer or replace the drum.
Change shim combination. Remove debris
from surface or ends of drum.
Chatter
Surface (close evenly spaced)
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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Page 17
NOTES
Page 18
AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
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AMERICANSANDERSTECHNOLOGY
American Sander 12
Wiring Diagram 4/93
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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AMERICANSANDERSTECHNOLOGY
Model American 12 Floor Sander
Drawing #1 Handle Assembly 10/00
2
46
1
5
4
3
7
6
8
9
27
10
26
11
13
12
25
24
21
15
16
17
22
15
18
12
23
28
45
44
21
10
29
20
19
30
32
31
43
33
36
35
34
37
42
32
41
34
38
31
39
40
Page 20
AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
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AMERICANSANDERSTECHNOLOGY
Model American 12 Floor Sander
Parts List #1 Handle Asembly 10/00
Ref No. Part No
Description
Qty
1
Ref.
Cord Assembly
Connector (NEMA)
1
1
3
1
4
4
5
5
1
1
1
3
2
3
1
1
1
1
1
2
1
2
1
1
1
1
1
1
1
2
2
1
2
1
1
3
1
1
2
1
3
1
1
1
1
ꢀ
2
3
4
5
6
7
8
9
41706A
962065
43501A
85313C
980607
962794
980650
22127C
48901A
48900A
980699
49023A
962015
80022A
67129A
41411A
980603
85833A
920284
66694A
962481
980646
25602A
66151A
80021A
85818A
21904C
64405A
86200A
920110
20704C
85816A
66114C
41917A
962288
21102C
62609A
962016
170637
980638
41707A
67144A
920148
45608A
Screw - 8-32 x ¼ Pn St Mach
Inlet - 20A, 250V
Screw - 6-32 x ¼ Pn St Mach
Washer - #1106 Shakeproof
Screw - 10-24 x 1 Pn St
Washer - 3/16 Lock
Cover - Switch Box
Wire Ass'y - Green
Wire Assembly - Ground
Washer - #1210 Shakeproof
Wire Assembly Black
ꢀ
10
11
12
13
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
3
Screw - 10-24 x /8
Bolt ½ x 5/8
Adjuster Control Rod
Switch - Circuit Breaker
Washer #8 Shakeproof
Screw, #10-32 Ground
Nut ¼-20
Plate Control Lever
Screw ¼-20 x 1¼
Washer ¼
Lever Control
Pivot Control Rod
Bolt 3/8 x 5/8
5
Screw /16-18 x 2¼ Hex St
Clamp - Handle
ꢀ
Handle - Steering
3
Screw - /8-16 Set St
Nut 5/16 -18 ESNA
33ꢀ
34
Box - Switch
Screw 5/16-18 x ¾ Hex St Flt Hd
Pipe - Handle
ꢀ
ꢀ
35
36
37
38
39
40
41
42
43
44
45
46
Cord - Interconnecting
3
Screw /8-16 x 1" Hex St Cap
Bracket - Handle
Cover, Handle Bracket
Screw 10-24 x ½ Pn St Mach
Connector, Conduit
Washer - 3/8 Diameter Lock
Connector
Rod Control
Nut 3/8-16 Jam
Plug (NEMA)
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Page 21
AMERICANSANDERSTECHNOLOGY
Model American 12 Floor Sander
Drawing #2 10/00
41
52
55
30
43
82
Page 22
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AMERICANSANDERSTECHNOLOGY
Model American 12 Floor Sander
Parts List #2 10/00
Ref #
Part No.
Description
Qty
Ref # Part No.
Description
Qty
51
52
53
54
55
56
962288
67816A
20401B
67815A
68101A
67413A
Screw, 3/8-16 x 1" Hex
Spacer
Arm
Spacer, Idler Bearing
Stud
Shaft
Seal, Dust Pipe
Label, Lifting Warning
Screw, ¼-20 x ½ Pan
Pulley, Fan Shaft
Shaft, Drum Cover
Drum Assembly
Spacer, Drum Shaft
Retainer, Bearing
2
1
1
1
1
1
1
1
3
1
1
1
1
1
1
2
3
4
5
6
62800A
85714A
87006A
962216
962870
44639A
44640A
64460A
66164A
51028A
60401A
925044
66110A
50954A
84220A
68704A
26108C
51021A
68002A
26102A
920256
85820A
85816A
27801C
67820A
Pipe, Ass'y
1
1
1
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
1
1
1
Screw, ½ - 13 x 2¼ Hex
Washer, .56 X 1.38 X .11 Flat
3
Screw /8 -16 x 1¼ Hex
Screw 3/8-16 x 1
Motor 4 hp 230V/60
Motor 3 hp 240V/50
Handle, Motor
Pulley, Motor
57* 38109A
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
77234A
962823
66172A
67417A
13500A
67819A
66918A
7
8
9
Belt-V
Arm, Cable
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Pin, 3/32 x 1 Cotter
Pipe Assembly
Dust Bag
Screw, ½-13 x 2¼ Ft.
Washer - Motor Screw
Platform, Motor
Belt - V
66165A
980644
920280
962262
55400A
67415A
67911A
22111A
31211A
85517A
86202A
67908A
66115A
29402A
66505A
925036
877304
920148
87000A
61602A
32357A
930087
74044A
62904A
697502
41305A
41304A
47378A
962823
980614
45604A
41945A
915098
Pulley,Drum
1
1
1
1
3
1
1
1
1
5
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
2
2
1
1
1
1
1
1
1
Washer, 5/8 Plain
Nut, 5/8-18 Hex Jam
Screw, 8-32 x ¼ Set
Key - #9 Woodruff
Shaft, Drum
Stud
Pan, Dust
Nut, 5/16-18 Hex
3
5
Screw, /8-16 x /8 Hex
Screw, 5/16-18 x 13/4 Hex
Support, Dust Pipe
Spring
Cover,Drum
Bumper Assembly
Screw, 10-24 x ½ PN
Spacer, Motor Screw
25
26
27
28
29
30
31
32
33
34
36
37
38
39
NI
87101A
920196
30501A
85817A
34224A
81202A
87002A
23300A
39704A
24504C
902567
34223A
23406C
962983
18601A
Washer, ½ Lock
Nut, ½-13 Hex Jam
Bushing
1
1
1
1
1
2
2
1
1
1
1
1
1
6
5
Screw, Set /8-11
Spring
Plunger
Yoke
Pin, Yoke
Pin, 3/32 x 3/4 Cotter
RingRetaining
Nut, 3/8-16 Hex Jam
Washer
Collar
Cover Handle
Rivet
Plate Safety
Enclosure Motor
Strain Relief Bushing
Capacitor, Start
Capacitor, Run
Switch, Start
Screw, ¼-20 X ½
Washer
5
Screw, /16-18 x 2" Hex
Gasket
Nut, 7/16-14 Hex L.H.
Washer
Fan
Washer, Felt
Housing,Fan
Bearing
Gasket, Support Pipe
Frame
5
Screw, ¼-20 x /8 Pan
Shaft Ass'y Drum (1)
includes D56, D39. D71
Washer, ¼ Lock
Cover,DrumHousing
Screw, Special
Label, I.D. American 12
Bearing
Housing, Bearing
Spacer, Drum Shaft
Key - #5 Woodruff
Shaft Fan
40
41
42
43
44
45
46
47
48
49
50
980657
62608C
67314A
70042A
51110A
64703A
67818A
915028
67424A
51111A
62001A
9
1
1
1
2
1
1
2
1
2
1
Plug
Cord, Motor
Key, ¼ Sq. x 1¼
Ring, Retaining
Retainer Pulley
100 57712A
101 87034A
102 962288
103 66173A
Bearing
Cap, Bearing
3
Screw, /8-16 x 1
PulleyIdler
*NOTE: #57 Not Illustrated
Motor Parts Not Illustrated
Part #
Description
EndBell
Front Cover
Fan
Qty.
Part #
Description
Bearing Front
Bearing Rear
Armature Assembly
Qty.
50563A
52768A
53998A
52769A
1
1
1
1
51188A
902547
40316A
1
1
1
Fan Cover
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
Page 23
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AMERICANSANDERSTECHNOLOGY
American 12 Floor Sander
Assembly Drawing #3 6/01
1
15
16
19
20
0
9
37
59
54
Optional Urethane Wheels
55
37
62
61
60
37
9
10
33
56
Page 24
AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
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AMERICANSANDERSTECHNOLOGY
American 12 Floor Sander
Assembly Parts List #3 6/01
Ref. No Part No.
Description
Screw, 10-24 x 3/8 Set
Knob,Hand
Screw, Sustainer
Washer
Spring, Sustainer
Screw
Plunger,Spring
Rod, Pilot
Nut, ½-13 Hex Jam
Washer, ½ Lock
Spring
Frame, Main
Button, Plug
Qty Qty
1
88502A
25200C
67309A
87000A
67907A
67315A
66123A
67109A
920196
87101A
67906A
Ref.
2
1
1
1
1
3
3
1
3
3
3
1
1
2
6
6
1
1
3
3
1
2
2
2
2
4
1
1
1
13
1
1
-
2
1
1
1
1
3
3
1
3
3
3
1
1
2
8
6
1
1
3
8
1
2
2
2
2
4
1
1
1
13
1
1
2
1
2
1
6
-
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33ꢀ
34
35
36
37ꢀ
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
57100A
66628C
962015
980650
23801A
60715B
962823
980657
67814A
86202A
67909A
51113A
21902C
962892
68001A
62801A
980614
87007A
85806A
81209A
60547A
66913A
51112A
67821A
51225A
29403C
60101A
920160
87006A
26000C
86201A
67144A
62000A
26502A
85811A
920260
53917B
66503A
925036
25600A
67416A
67810A
Plate, CoverWheel
Screw, 10-24 x 3/8 Pn St Mach
Washer, 3/16Lock
Guard, Belt
Bolt, Pivot
Screw, ¼-20 x ½ Pn St Mach
Washer, ½ Lock
Spacer
Screw, 5/8-11 x 5/8 St
Spring
Ball, ½ Diameter
Clamp
Screw, ¼-20 x 5/8 Pn St Mach
Stud, Belt Guard
Shaft, Cont. Ecc.
Washer, #1114 Shakeproof
Washer, Cont. Shaft Ecc.
Screw, ¼-20 x 1 Hex St
Nut, Large Flange ½-13
Axle
Retainer,Bearing
Bearing
Spacer
Bearing, Ball
Yoke, Wheel
1
2
1
6
1
3
1
Axle
1
1
Nut, 5/16-18 Hex JAM
Washer, 9/16 x 13/8 x 10
Nut, Retaining
Screw, 5/16-18 Set
Rod,Control
ref. ref.
1
1
1
1
1
4
1
1
1
1
1
1
2
-
1
1
1
1
1
4
1
1
1
1
1
1
2
2
-
Nut, End
Plate, Plunger
Screw, 5/16-18 x 3/4 Hex St Cap
Nut, 3/8-16 Hex
Fork, Control
Pin, Fork
Pin, 3/32 x 3/4 Cotter
Lever,Reach
Shaft,Lever
Spacer
Spacer
55 ꢀ 60544A
56
59928A
10243A
59907A
67817A
87003A
54000A
167312
60481A
50992A
Wheel (Steel)
Kit, Wheel(Urethane)(Optional)
Wheel(Canvas)
Spacer
3
-
ꢀ
-
-
1
3
2
2
2
2
2
57
58
59
60ꢀ
61ꢀ
62ꢀ
3
2
2
2
2
-
NOTE:
Washer
ꢀꢀindicates a change has been
made since the last publication
of this manual.
Fitting, Grease
Ring,Retainer
Spacer
Wheel, Assemlby
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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Page 25
AMERICANSANDERSTECHNOLOGY
American 12 Floor Sander
Accessories Drawing & Parts List #4 10/00
3
6
7
8
9
10
RefRef. #
Part No.
Description
Qty
1
2
3
5
6
7
8
9
60724A
Belt, Operating
1
59810A
59811A
64415A
42201A
42302A
68314A
Wrench, Paper Clamp
Wrench, End 3/4 x 7/16
Handle, Carrying
Cord Assembly (NEMA)
Cordset, 240/50
Template
1
1
1
1
1
1
10
Page 26
AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
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Chatter Wave Prevention
American Sanders Technology Sanders are designed and manufactured to the most rigid tolerances. How-
ever, after a finishing cut it is possible to see “chatter” or “waves”.
The best guarantee to remove the chatter is to finish the floor with a
rotating horizontal sander, such as American Sanders Technology’s Sander 16.
To minimize chatter when using a belt or drum sander the following steps should be taken:
1) DRUM PAPER...insure the paper is secured in the slot, but not too tight. Paper that
is too tight will force the drum slot wider, leaving a “slot mark chatter” on the floor.
2) DRUM Mwithout forward
traversehe mark. Cutting
at the mand width.
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
Page 27
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ChatterWavePrevention(cont)
3) UNEVEN WALKING PACE..... can leave lengthy “waves”. The machine cuts more material during
the slower pace. Pay particular attention to a steady, even pace.
4) EXCESSIVE LIGHT CUTS.... may reveal high spots on the paper/contact wheel and cause chatter.
Take a heavier cut and increase the pace.
5) DEBRIS.... lodged between the paper and the drum will leave chatter. On a belt sander, debris may
be adhered to the drum. Insure the drum is clean and free of debris before placing the paper on.
6) SANDER PAPER QUALITY....may vary. Belt seams can be thicker on low quality paper and cause
chatter. Use only American Sanders Technology specified sandpaper.
PROPER CARE OF YOUR MACHINE CAN MINIMIZE CHATTER AND WAVES.
1) V-BELTS.... can cause vibration and chatter if they are of low quality. Use only belts specified by
American Sanders Technology.
2) TRUCK AND CASTER WHEELS....with flat spots, out-of-roundness, or debris adhered to their surface
can cause “waves” or a “chatter effect”. Always clean and inspect all wheels before starting to sand,
and before the finish cut. Replace or true the wheels if found to be out-of-round.
3) DUST PICK-UP SHOES.......may need adjusted differently for different materials that are to be
sanded. An improperly adjusted shoe will leave trailing debris that will be run over by the wheels and
cause“randomwaves”.
4) CONTACT WHEELS (DRUMS).......may be out-of-round and cause “chatter”. Contact your Ameri-
can Sanders Technology dealer for assistance to true or replace the drum.
5) BEARINGS......in the motor, drum, or fan system may become worn and induce vibration which could
cause“chatter”.
6) PULLEYS.....that are damaged or severly worn can induce vibration and cause “chatter”. Contact
your American Sanders Technology dealer for assistance.
American Sanders Technology is not responsibile for rework of floors that are unacceptable to
the customer. It is your responsibility to insure your equipment is in proper operating order, and
that you use the right machine for the job.
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ALTO® PRODUCT SUPPORT BRANCHES
U. S. A. Locations
European Locations
HEAD OFFICE
PRODUCTION FACILITIES
ALTO U.S.Inc., St. Louis, Missouri
16253 Swingley Ridge Road, Suite 200
Chesterfield, Missouri 63017-1725
ALTO Danmark A/S, Aalborg
Blytaekkervej 2
DK-9000 Aalborg
+45 72 18 21 00
PRODUCTION FACILITIES
ALTO Danmark A/S, Hadsund
Industrikvarteret
ALTO U.S.Inc., Springdale, Arkansas
2100 Highway 265
DK-9560 Hadsund
+45 72 18 21 00
Springdale, Arkansas 72764
(501) 750-1000
Customer Service - 1-800-253-0367
Technical Service - 1-800-356-7274
SALES SUBSIDIARIES
ALTO Canada Ltd., Rexdale Ontario
24 Constellation Ct.
ALTO U.S.Inc., Bowling Green, Ohio 43402
1100 Haskins
(416) 675-5830
ALTO U.S.Inc., Clearwater, Florida 33765
1500 N. Belcher Road
ALTO Overseas Inc., Sydney (Australia)
1B/8 Resolution Drive
Caringbah NSW 2229
+61 2 9524 6122
SERVICE FACILITIES
ALTO Cleaning Systems Asia Pte Ltd., Singapore
No.17 Link Road
ALTO U.S. Inc., Carlstadt, New Jersey 07072
150 Commerce Road
Singapore 619034
(201) 460-4774
+65 268 1006
ALTO U.S. Inc., Elk Grove, Illinois 60007
2280 Elmhurst Road
ALTO Deutschland GmbH, Frondenberg (Germany)
Ardeyer Str. 15
(847) 956-7900
D-58730 Frondenberg
+49 2373 754 200
ALTO U.S. Inc., Denver, Colorado 80204
1955 West 13th Ave.
ALTO Cleaning Systems (UK) Ltd., Penrith
Gilwilly Industrial Estate
Penrith
(303) 623-4367
ALTO U.S.Inc., Houston, Texas 77040
7215 North Gessner Road
Cumbria CA11 9BN
+44 1768 868 995
ALTO France S.A.Strasbourg
B.P. 44, 4 Place d’Ostwald
F-67036 Strasbourg
Cedex 2
SALES AND SERVICE FACILITIES
ALTO U.S.Inc., Madison Heights, Michigan 48071-0158
+33 3 8828 8400
29815 John R.
(810) 544-6300
ALTO Nederland B.V.Vianen
Stuartweg 4C
ALTO U.S.Inc., Marietta, Georgia 30062
1355 West Oak Common Lane
(770) 973-5225
NL-4131 NJVianen
+31 347 324000
ALTO Sverige AB, Molndal (Sweden)
Aminogatan 18
CLARKE TECHNOLOGY
AMERICAN SANDERS TECHNOLOGY
A.L. COOK TECHNOLOGY
Customer Service Headquarters and Factory
2100 Highway 265
Box 4029
S-431 04 Molndal
+46 31 706 73 00
ALTO Norge A/S, Oslo (Norway)
Bjornerudveien 24
N-1266
Springdale, Arkansas 72764
(501) 750-1000
+47 2275 1770
Technical Service
1-800-356-7274
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AMERICAN SANDERS TECHNOLOGY U.S. WARRANTY
This American Sanders Technology Industrial/Commercial Product is warranted to be free from defects in
materials and workmanship under normal use and service for a period of one year from the date of purchase,
when operated and maintained in accordance with American Sanders Technology's Maintenance and Op-
erations Instructions.
This warranty is extended only to the original purchaser for use of the product. It does not cover normal
wear parts such as electrical cable or V-belts.
If difficulty develops with the product, you should:
(a). Contact the nearest authorized American Sanders Technology repair location or contact the ALTO Service
Operations Department, 2100 Highway 265, Springdale, Arkansas 72764, for the nearest authorized American
Sanders Technology repair location. Only these locations are authorized to make repairs to the product under this
warranty.
(b). Return the product to the nearestAmerican Sanders Technology repair location. Transportation charges to
and from the repair location must be prepaid by the purchaser.
(c). American Sanders Technology will repair the product and or replace any defective parts without charge within
a reasonable time after receipt of the product.
American Sanders Technology's liability under this warranty is limited to repair of the product and/or replace-
ment of parts and is given to purchaser in lieu of all other remedies, including INCIDENTALAND CONSEQUEN-
TIAL DAMAGES.
THERE ARE NO EXPRESS WARRANTIES OTHER THAN THOSE SPECIFIED HEREIN. THERE ARE NO
WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION OF THE FACE HEREOF. NO WARRANTIES,
INCLUDING BUT NOT LIMITED TO WARRANTY OF MECHANTABILITY, SHALL BE IMPLIED. A warranty
registration card is provided with yourAmerican Sanders Technology product. Return the card to assistAmerican
Sanders Technology in providing the performance you expect from your new floor machine.
ALTO U.S. Inc., 2100 Highway 265, Springdale, Arkansas 72764
AMERICAN SANDERS TECHNOLOGY reserves the right to make
changes or improvements to its machine without notice.
Always use genuine American Sanders Technology Parts for repair.
AMERICAN SANDERS TECHNOLOGY
2100 Highway 265
Springdale, Arkansas, 72764
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