Page 1
Operator's
American
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
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
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.
12
Form No. 78150C 6/01 AMERICAN SANDERS TECHNOLOGY Printed in the U.S.A.
Page 2
Contents of this Book
Operator Safety Instructions ......................................................... 3
Introduction and Machine Specifications .......................................5
230V Electrical Connection Instructions ........................................ 6
How to Transport the Machine ......................................................7
Machine Set-Up ........................................................................... 8
How to Operate the Machine ......................................................10
Sanding Cuts and Sandpaper .................................................... 12
Sander Adjustment Procedures ..................................................14
Routine Maintenance ..................................................................16
Troubleshooting .........................................................................17
Wiring Diagram..........................................................................19
Assembly Drawing #1 ................................................................ 20
Assembly Parts List #1 ........................................................... 21
Assembly Drawing #2 ................................................................ 22
Assembly Parts List #2 ........................................................... 23
Assembly Drawing #3 ................................................................ 24
Assembly Parts List #3.............................................................25
Accessories Drawing & Parts List ..............................................26
Chatter-Wave Prevention ........................................................... 27
Page 2 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
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OPERATOR SAFETY INSTRUCTIONS
WARNING AVERTISSEMENT ADVERTENCIA
DANGER means: 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.
WARNING means: 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.
CAUTION means: 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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Page 4
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: 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.
DANGER: 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.
DANGER: 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: 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.
DANGER: 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.
DANGER: 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.
WARNING: 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: 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.
CAUTION: Damage could occur to the machine if not properly kept in a dry building for storage. Store
the machine in a dry building.
CAUTION: The machine is heavy. When transporting the machine, remove the motor. Get help to lift
the machine and motor.
CAUTION: 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 4 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
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Introduction and Machine Specifications
Motor Starter / Protector
Sanding Pressure Adjustment
Tool Storage Tray
Operating Controls
Operating Controls
Leveling Adjustment
PART NUMBER 07044C 07108A 07049C 07109A
Abrasive Size 12 x 261/8 (30.5cmx67.3cm) paperback
Contact Wheel Speed 2000/2400 rpm (revolutions per min.)
Abrasive Speed 3796/4555 sfm (surface feet per min.)
Dust Fan Speed 5000 rpm (revolutions per minute)
Dust Fan Flow 280 cfm (cubic feet per minute)
Motor 60 Hz 230V 4hp (3 kW) 50 Hz 240V 3hp (2.2 kW)
Leveling Control Externally Adjustable
Operating Control Adjustable Lever
Motor Starter/Protector Magnetic Circuit Breaker
Sanding Pressure Adjustment Infinitely Adjustable
Wheels (Front) Steel Urethane Steel Urethane
Wheel (Adjustment) Steel Canvas Steel Canvas
Drive V-Belt
Dimensions 40½ x 15 x 36 3/4
Weight 240 lbs. (98 kg)
(102.9cm x 38.1cm x 93.3cm)
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.
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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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.
This machine must be connected to an electrically ground circuit in order to protect the operator from electric shock.
This machine has an approved power cord with three conductors as well as a plug with three terminals. Connect the
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: Electrocution could occur if the machine is exposed to water or rain. Keep the machine
in a dry building.
DANGER: Electrocution could occur if machine is improperly connected to the electrical system. 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
or connector body other than a three plug receptacle or connector body. If the outlet does
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.
Extension Cords
Use only an approved three-pronged extension cord with two main conductors and one earthing conductor. This
machine’s power cord has a wire size of 10 gauge. This machine is equipped with a 100' power cord. When greater
range is needed follow the table below to determine cable guage of additional footage. Refer to the following chart
for extension cord information.
Feet/Wire Guage (Stranded Copper)
Source Voltage 0 - 100' 100 - 250'
208 6
Use Voltage
Booster
230 10 8
If motor appears to labor or takes a considerable longer time to come up to speed reduce sanding pressure.
Page 6 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
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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
figure 1.
3. Remove the belt cover.
4. Remove the fan belt.
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.
3. Resecure the motor to the chassis.
Figure 1
Figure 2
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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Page 8
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,
have the manual explained fully before allowing
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 template.
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 8 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
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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.
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,
remove the large grains from the folded
ends. To remove the grains, rub the
folded ends together.
Figure 3
Figure 4
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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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 entirely if possible from the work
area.
DANGER: 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 ignite. Read the manufacturer's label on all chemicals
used to determine combustibility. Keep the work area well
ventilated.
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.
DANGER: 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 countersink all nails before sanding
floors.
Page 10 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
Page 11
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-
chine be necessary, serious operator injury could occur if the
operator has tied the loose end
of the operator's belt strap to the
machine. Always position the
strap so that you can let go and
get away quick in case of bag
fire or explosion.
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 contact wheel is running on the floor
surface. To prevent damage to
the surface, make sure the machine is always moving when
the contact wheel is in contact
with the floor.
Figure 5
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.
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.
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.
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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A. First pass forward, right to left.
B. First pass reverse, retrace same path.
C. Second pass forward, overlap ½ the drum width. D. Second pass reverse, retrace second path forward,
E. Work the remaining unsanded floor in the
same fashion, right to left.
etc....for the entire room
Figure 6
Page 12 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
Page 13
Sanding Cuts and Sandpaper
Initial Cut
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
12 grit
16 grit
20 grit
24 grit
For removing gross imperfections and restore evenness
to old flooring. To remove build-up of paints and varnishes.
Part No.
945516
945517
945518
945519
30 grit For first sanding of new flooring (maple, oak). For removing 945520
36 grit minor imperfections and finishes from old flooring. 945521
40 grit For first sanding of new flooring (oak, walnut). For removing 945522
minor imperfections and finishes from old flooring.
50 grit For first sanding of new flooring (cedar, pine, fir) 945533
For clean-up of 16 grit.
60 grit For clean-up from initial cut 36 - 40 grit. 945544
80 grit For final sanding of certain hardwoods. For clean-up 945545
of initial cuts (50 grit).
100 grit For final sanding of certain hardwoods where a smooth 945546
surface is desired.
120 grit For final sanding of certain conifers. 945547
150 grit For final sanding of certain conifers where a smooth 945548
surface is desired.
180 grit For surface roughing between coats of finish. 945549
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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Sander Adjustment Procedures
DANGER: Electrocution could occur if main-
tenance and repairs are performed
on a unit that is not properly disconnected from the power source. Dis-
connect the power supply before
attempting any maintenance or service.
DANGER: 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.
Sanding Pressure
To adjust the sanding pressure follow this procedure:
1. Screw the sanding pressure knob down to increase 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 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
Page 15
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) counterclockwise. 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.
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
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.
Figure 7
Figure 8
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
reach is found.
3. Tighten the locknut.
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
Figure 9
Page 15
Page 16
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.
Dust Bag
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
dust recovery.
Drive Belt
Periodically check the drive belt tension.
Bearings
Periodically check the bearings for wear or damage
according to the following schedule:
Idler pulley after 1st 1500 hrs.
Fan shaft after 1st 2500 hrs.
Arbor shaft after 1st 5000 hrs.
Motor shaft after 1st 5000 hrs.
Page 16 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
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Troubleshooting
PROBLEM
Drive belts slip. Insufficient tension. Tension drive belt.
Worn belts. Replace belts.
Squealing, growling or grinding Damaged and/or worn bearing. Remove drive belts, rotate arbor
noise coming from machine. motor, fan, shafts and idler pulley to
Dust pick-up is poor. Dust bag is over 1/3 full. Empty contents of bag.
Dust bag is dirty. Shake debris from bag and wash.
Dust chute is obstructed. Remove fan cover and clear throat.
Motor will not start. Defective motor starter. Contact an authorized American Sanders
Defective start capacitor. Contact an authorized American Sanders
Defective electronic start switch. Contact an authorized American Sanders
Low voltage from poor connection. Contact an authorized American Sanders
Defective motor. Contact an authorized American Sanders
No power. Check power supply and connections.
Motor runs sluggishly. Low voltage from excessive footage, Locate power source nearer to work site.
undersized extension cord, or poor Decrease sanding pressure.
connection.
CAUSE
(Squeaking or squealing sound)
locate dragging or rough bearing.
Contact an authorized American Sanders
Technology dealer.
Technology dealer.
Technology dealer.
Technology dealer.
Technology dealer.
Technology dealer.
ACTION
Defective run capacitor. Contact an authorized American Sanders
Defective motor. Contact an authorized American Sanders
Motor starter trips/repeatedly Excessive load. Contact an authorized American Sanders
trips. Technology dealer.
Defective electronic start switch. Contact an authorized American Sanders
Defective motor starter. Contact an authorized American Sanders
Low voltage from poor connection. Contact an authorized American Sanders
Defective motor Contact an authorized American Sanders
Defective capacitor. Contact an authorized American Sanders
Uneven cut. Leveling out of adjustment. Readjust leveling.
Burning or glazing. Dull abrasive. Replace abrasive.
Excessive sanding pressure. Decrease sanding pressure setting.
Too fine of an abrasive. Use coarser abrasive.
Slow cutting. Dull abrasive. Replace abrasive.
Too fine of an abrasive. Use a coarser abrasive.
Insufficient sanding pressure. Increase sanding pressure setting.
Waves on sanded surface. Debris on wheel. Remove and clean wheels.
Flat spot on tire(s). Replace tires.
Technology dealer.
Technology dealer.
Technology dealer.
Technology dealer.
Technology dealer.
Technology dealer.
Technology dealer.
Chatter marks on sanded Drum out of round. Contact an authorized American Sanders
Chatter
Surface (close evenly spaced) Technology dealer or replace the drum.
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
Drum vibration. Change shim combination. Remove debris
from surface or ends of drum.
Page 17
Page 18
NOTES
Page 18 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
Page 19
AMERICAN SANDERS TECHNOLOGY
American Sander 12
Wiring Diagram 4/93
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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AMERICAN SANDERS TECHNOLOGY
Model American 12 Floor Sander
Drawing #1 Handle Assembly 10/00
44
45
46
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27
25
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24
21
22
1
19
10
20
15
2
5
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10
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12
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29
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40
36
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Page 20 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
Page 21
AMERICAN SANDERS TECHNOLOGY
Model American 12 Floor Sander
Parts List #1 Handle Asembly 10/00
Ref No. Part No Description Qty
1 Ref. Cord Assembly 1
w
2 41706A Connector (NEMA) 1
3 962065 Screw - 8-32 x ¼ Pn St Mach 3
4 43501A Inlet - 20A, 250V 1
5 85313C Screw - 6-32 x ¼ Pn St Mach 4
6 980607 Washer - #1106 Shakeproof 4
7 962794 Screw - 10-24 x 1 Pn St 5
8 980650 Washer - 3/16 Lock 5
w
9 22127C Cover - Switch Box 1
10 48901A Wire Ass'y - Green 1
11 48900A Wire Assembly - Ground 1
12 980699 Washer - #1210 Shakeproof 3
13 49023A Wire Assembly Black 2
15 962015 Screw - 10-24 x
16 80022A Bolt ½ x 5/8 1
17 67129A Adjuster Control Rod 1
18 41411A Switch - Circuit Breaker 1
19 980603 Washer #8 Shakeproof 1
20 85833A Screw, #10-32 Ground 1
21 920284 Nut ¼-20 2
22 66694A Plate Control Lever 1
23 962481 Screw ¼-20 x 1¼ 2
24 980646 Washer ¼ 1
25 25602A Lever Control 1
26 66151A Pivot Control Rod 1
27 80021A Bolt 3/8 x 5/8 1
28 85818A Screw 5/16-18 x 2¼ Hex St 1
29 21904C Clamp - Handle 1
w
30 64405A Handle - Steering 1
31 86200A Screw - 3/8-16 Set St 2
32 920110 Nut 5/16 -18 ESNA 2
w
33 20704C Box - Switch 1
34 85816A Screw 5/16-18 x ¾ Hex St Flt Hd 2
w
35 66114C Pipe - Handle 1
36 41917A Cord - Interconnecting 1
37 962288 Screw 3/8-16 x 1" Hex St Cap 3
w
38 21102C Bracket - Handle 1
39 62609A Cover, Handle Bracket 1
40 962016 Screw 10-24 x ½ Pn St Mach 2
41 170637 Connector, Conduit 1
42 980638 Washer - 3/8 Diameter Lock 3
43 41707A Connector 1
44 67144A Rod Control 1
45 920148 Nut 3/8-16 Jam 1
46 45608A Plug (NEMA) 1
3
/8 3
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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AMERICAN SANDERS TECHNOLOGY
Model American 12 Floor Sander
Drawing #2 10/00
89
88
87
7
5
58
4
90
91
92
93
96
94
95
1
14
15
24
39
2
3
16
40
41
41
100
6
99
98
20
97
8
17
27
101
102
11
12
10
13
9
20
19
21
22
23
33
34
28
29
30
31
37
32
18
86
36
38
45
43
70
42
73
44
46
25
62
71
26
72
63
44
61
64
84
52
85
51
53
54
83
49
47
103
48
17
55
56
49
40
59
50
9
60
31
71
40
39
67
68
69
76
75
74
77
78
79
80
81
82
Page 22 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
30
Page 23
AMERICAN SANDERS TECHNOLOGY
Model American 12 Floor Sander
Parts List #2 10/00
Ref # Part No. Description Qty
1 62800A Pipe, Ass'y 1
2 85714A Screw, ½ - 13 x 2¼ Hex 1
3 87006A Washer, .56 X 1.38 X .11 Flat 1
4 962216 Screw
5 962870 Screw
6 44639A Motor 4 hp 230V/60 1
44640A Motor 3 hp 240V/50 1
7 6 4460A Handle, Motor 1
8 6 6164 A Pulley, Motor 1
9 51028A Belt-V 1
10 60401A Arm, Cable 1
11 925044 Pin, 3/32 x 1 Cotter 1
12 66110A Pipe Assembly 1
13 50954A Dust Bag 1
14 84220A Screw, ½-13 x 2¼ Ft. 1
15 68704A Washer - Motor Screw 1
16 26108C Platform, Motor 1
17 51021A Belt - V 1
18 68002A Stud 1
19 26102A Pan, Dust 1
20 920256 Nut,
21 85820A Screw, 3/8-16 x 5/8 Hex 3
22 85816A Screw, 5/16-18 x 13/4 Hex 1
23 27801C Support, Dust Pipe 1
24 67820A Spacer, Motor Screw 1
25 87101A Washer, ½ Lock 1
26 920196 Nut, ½-13 Hex Jam 1
27 30501A Bushing 1
28 85817A Screw, 5/16-18 x 2" Hex 1
29 34224A Gasket 1
30 81202A Nut, 7/16-14 Hex L.H. 2
31 87002A Washer 2
32 23300A Fan 1
33 39704A Washer, Felt 1
34 24504C Housing, Fan 1
36 902567 Bearing 1
37 34223A Gasket, Support Pipe 1
38 23406C Frame 1
39 962983 Screw, ¼-20 x 5/8 Pan 6
NI 18601A Shaft Ass'y Drum (1)
40 980657 Washer, ¼ Lock 9
41 62608C Cover, Drum Housing 1
42 67314A Screw, Special 1
43 70042A Label, I.D. American 12 1
44 51110A Bearing 2
45 64703A Housing, Bearing 1
46 67818A Spacer, Drum Shaft 1
47 915028 Key - #5 Woodruff 2
48 67424A Shaft Fan 1
49 51111A Bearing 2
50 62001A Cap, Bearing 1
3
/8 -16 x 1¼ Hex 4
3
/8-16 x 1 1
5
/16-18 Hex 2
includes D56, D39. D71
Ref # Part No. Description Qty
51 962288 Screw, 3/8-16 x 1" Hex 2
52 67816A Spacer 1
53 20401B Arm 1
54 67815A Spacer, Idler Bearing 1
55 68101A Stud 1
56 67413A Shaft 1
57* 38109A Seal, Dust Pipe 1
58 77234A Label, Lifting Warning 1
59 962823 Screw, ¼-20 x ½ Pan 3
60 66172A Pulley, Fan Shaft 1
61 67417A Shaft, Drum Cover 1
62 13500A Drum Assembly 1
63 67819A Spacer, Drum Shaft 1
64 66918A Retainer, Bearing 1
65
66
67 66165A Pulley, Drum 1
68 980644 Washer, 5/8 Plain 1
69 920280 Nut, 5/8-18 Hex Jam 1
70 962262 Screw, 8-32 x ¼ Set 1
71 55400A Key - #9 Woodruff 3
72 67415A Shaft, Drum 1
73 67911A Spring 1
74 22111A Cover, Drum 1
75 31211A Bumper Assembly 1
76 85517A Screw, 10-24 x ½ PN 5
77 86202A Screw, Set 5/8-11 1
78 67908A Spring 1
79 66115A Plunger 1
80 29402A Yoke 1
81 66505A Pin, Yoke 1
82 925036 Pin, 3/32 x 3/4 Cotter 1
83 877304 Ring Retaining 1
84 920148 Nut, 3/8-16 Hex Jam 1
85 87000A Washer 1
86 61602A Collar 1
87 32357A Cover Handle 1
88 930087 Rivet 2
89 74044A Plate Safety 1
90 62904A Enclosure Motor 1
91 697502 Strain Relief Bushing 1
92 41305A Capacitor, Start 2
93 41304A Capacitor, Run 1
94 47378A Switch, Start 1
95 962823 Screw, ¼-20 X ½ 2
96 980614 Washer 2
97 45604A Plug 1
98 41945A Cord, Motor 1
99 915098 Key, ¼ Sq. x 1¼ 1
100 57712A Ring, Retaining 1
101 87034A Retainer Pulley 1
102 962288 Screw, 3/8-16 x 1 1
103 66173A Pulley Idler 1
*NOTE: #57 Not Illustrated
Part # Description Qty.
50563A End Bell 1
52768A Front Cover 1
53998A Fan 1
52769A Fan Cover 1
Motor Parts Not Illustrated
Part # Description Qty.
51188A Bearing Front 1
902547 Bearing Rear 1
40316A Armature Assembly 1
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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AMERICAN SANDERS TECHNOLOGY
American 12 Floor Sander
Assembly Drawing #3 6/01
1
15
16
14
53
13
40
43
46
47
12
11
52
44
49
48
51
45
50
28
8
8
29
14
30
16
22
30
31
23
15
32
24
3
4
5
25
26
41
27
2
17
19
21
34
35
41
42
20
36
18
39
58
9
10
59
5655
57
55
39
54
37
56 57
37
54
38
10
9
Optional Urethane Wheels
55
37
62
56
61
60
37
33
9
10
Page 24 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
Page 25
NOTE:
u indicates a change has been
made since the last publication
of this manual.
AMERICAN SANDERS TECHNOLOGY
American 12 Floor Sander
Assembly Parts List #3 6/01
07048C
07108A
Ref. No Part No. Description Qty Qty
1 88502A Screw, 10-24 x 3/8 Set 2 2
2 25200C Knob, Hand 1 1
3 67309A Screw, Sustainer 1 1
4 87000A Washer 1 1
5 67907A Spring, Sustainer 1 1
6 67315A Screw 3 3
7 66123A Plunger, Spring 3 3
8 67109A Rod, Pilot 1 1
9 920196 Nut, ½-13 Hex Jam 3 3
10 87101A Washer, ½ Lock 3 3
11 67906A Spring 3 3
12 Ref. Frame, Main 1 1
13 57100A Button, Plug 1 1
14 66628C Plate, Cover Wheel 2 2
15 962015 Screw, 10-24 x 3/8 Pn St Mach 6 8
16 980650 Washer, 3/16 Lock 6 6
17 23801A Guard, Belt 1 1
18 60715B Bolt, Pivot 1 1
19 962823 Screw, ¼-20 x ½ Pn St Mach 3 3
20 980657 Washer, ½ Lock 3 8
21 67814A Spacer 1 1
22 86202A Screw, 5/8-11 x 5/8 St 2 2
23 67909A Spring 2 2
24 51113A Ball, ½ Diameter 2 2
25 21902C Clamp 2 2
26 962892 Screw, ¼-20 x 5/8 Pn St Mach 4 4
27 68001A Stud, Belt Guard 1 1
28 62801A Shaft, Cont. Ecc. 1 1
29 980614 Washer, #1114 Shakeproof 1 1
30 87007A Washer, Cont. Shaft Ecc. 13 13
31 85806A Screw, ¼-20 x 1 Hex St 1 1
32 81209A Nut, Large Flange ½-13 1 1
33u 60547A Axle - 2
34 66913A Retainer, Bearing 1 1
35 51112A Bearing 2 2
36 67821A Spacer 1 1
37u 51225A Bearing, Ball 6 6
38 29403C Yoke, Wheel 1 39 60101A Axle 3 1
40 920160 Nut, 5/16-18 Hex JAM 1 1
41 87006A Washer, 9/16 x 13/8 x 10 ref. ref.
42 26000C Nut, Retaining 1 1
43 86201A Screw, 5/16-18 Set 1 1
44 67144A Rod, Control 1 1
45 62000A Nut, End 1 1
46 26502A Plate, Plunger 1 1
47 85811A Screw, 5/16-18 x 3/4 Hex St Cap 4 4
48 920260 Nut, 3/8-16 Hex 1 1
49 53917B Fork, Control 1 1
50 66503A Pin, Fork 1 1
51 925036 Pin, 3/32 x 3/4 Cotter 1 1
52 25600A Lever, Reach 1 1
53 67416A Shaft, Lever 1 1
54 67810A Spacer 2 2
55 u 60544A Spacer - 2
56 59928A Wheel (Steel) 3 u 10243A Kit, Wheel (Urethane) (Optional) - -
59907A Wheel (Canvas) - 1
57 67817A Spacer 3 3
58 87003A Washer 2 2
59 54000A Fitting, Grease 2 2
60u 167312 Ring, Retainer 2 2
61u 60481A Spacer 2 2
62u 50992A Wheel, Assemlby - 2
07049C
07109A
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
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AMERICAN SANDERS TECHNOLOGY
American 12 Floor Sander
Accessories Drawing & Parts List #4 10/00
1
2
3
6
7
8
5
9
RefRef. # Part No. Description Qty
1
2
3 60724A Belt, Operating 1
5
6 59810A Wrench, Paper Clamp 1
7 59811A Wrench, End 3/4 x 7/16 1
8 64415A Handle, Carrying 1
9 42201A Cord Assembly (NEMA) 1
42302A Cordset, 240/50 1
10 68314A Template 1
10
Page 26 AMERICAN SANDERS TECHNOLOGY - American 12 Floor Sander Owner's Manual
Page 27
Chatter - Wave Prevention
American Sanders Technology Sanders are designed and manufactured to the most rigid tolerances. However, 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 MARKS........are caused by the operator lowering the drum to the floor without forward
traverse. These marks should be removed by cutting at a 45 degree angle to the mark. Cutting
at the mark while maintaining the same path will only increase the mark depth and width.
AMERICAN SANDERS TECHNOLOGY -American 12 Floor Sander Operator's Manual
Page 27
Page 28
Chatter Wave Prevention (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 “random waves”.
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.
Page 29
ALTO® PRODUCT SUPPORT BRANCHES
U. S. A. Locations European Locations
HEAD OFFICE
AL T O U.S . Inc., St. Louis, Missouri
16253 Swingley Ridge Road, Suite 200
Chesterfield, Missouri 63017-1725
PRODUCTION FACILITIES
AL T O U.S. Inc., Springdale, Arkansas
2100 Highway 265
Springdale, Arkansas 72764
(501) 750-1000
Customer Service - 1-800-253-0367
Technical Service - 1-800-356-7274
AL T O U.S . Inc., Bo wling Green, Ohio 43402
1100 Haskins
AL TO U .S. Inc., Clearwater , Florida 33765
1500 N. Belcher Road
SERVICE FACILITIES
AL T O U .S. Inc., Carlstadt, New Jersey 07072
150 Commerce Road
(201) 460-4774
PRODUCTION FACILITIES
AL T O Danmark A/S, Aalborg
Blytaekkervej 2
DK-9000 Aalborg
+45 72 18 21 00
AL T O Danmark A/S, Hadsund
Industrikvarteret
DK-9560 Hadsund
+45 72 18 21 00
SALES SUBSIDIARIES
AL T O Canada Ltd., Rexdale Ontario
24 Constellation Ct.
(416) 675-5830
ALTO Overseas Inc., Sydney (A ustr alia)
1B/8 Resolution Drive
Caringbah NSW 2229
+61 2 9524 6122
AL T O Cleaning Systems Asia Pte Ltd., Singapore
No. 17 Link Road
Singapore 619034
+65 268 1006
AL T O U .S. Inc., Elk Grov e, Illinois 60007
2280 Elmhurst Road
(847) 956-7900
AL T O U.S. Inc., Den ver , Colorado 80204
1955 West 13th A ve .
(303) 623-4367
AL T O U.S . Inc., Houston, Te xas 77040
7215 North Gessner Road
SALES AND SERVICE FACILITIES
AL TO U.S. Inc., Madison Heights, Michigan 48071-0158
29815 John R.
(810) 544-6300
AL TO U .S. Inc., Marietta, Georgia 30062
1355 West Oak Common Lane
(770) 973-5225
CLARKE TECHNOLOGY
AMERICAN SANDERS TECHNOLOGY
A.L. COOK TECHNOLOGY
Customer Service Headquarters and Factory
2100 Highway 265
Springdale, Arkansas 72764
(501) 750-1000
Technical Service
1-800-356-7274
AL TO Deutschland GmbH, F rondenberg (Germany)
Ardeyer Str . 15
D-58730 Frondenberg
+49 2373 754 200
AL T O Cleaning Systems (UK) Ltd., Penrith
Gilwilly Industrial Estate
Penrith
Cumbria CA11 9BN
+44 1768 868 995
AL T O France S .A. Str asbourg
B.P. 44, 4 Place d’Ostwald
F-67036 Strasbourg
Cedex 2
+33 3 8828 8400
AL T O Nederland B.V . Vianen
Stuartweg 4C
NL-4131 NJ Vianen
+31 347 324000
AL T O Sverige AB, Molndal (Sweden)
Aminogatan 18
Box 4029
S-431 04 Molndal
+46 31 706 73 00
ALTO Norge A/S, Oslo (Norwa y)
Bjornerudveien 24
N-1266
+47 2275 1770
Page 30
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 Operations 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 nearest American 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 replacement of parts and is given to purchaser in lieu of all other remedies, including INCIDENTAL AND CONSEQUENTIAL 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 your American Sanders Technology product. Return the card to assist American
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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