Alpha ECG-125 User manual

103 Bauer Drive, Oakland, NJ 07436 • 800-648-7229 • Fax: [phone]
www.alpha-tools.com
Part No: ECG-125
ECG-225
Alpha®Ecogrinder
Instruction Manual
MANUAL
VERSION 5

2
TABLE OF CONTENTS
Ecogrinder Overview................................................................................................ 4
Accessories .............................................................................................................. 5
Introduction............................................................................................................... 6
About The Symbols............................................................................................. 6
Electrical Symbols .............................................................................................. 6
General Safety Rules................................................................................................ 7
Work Area ............................................................................................................ 7
Electrical Safety .................................................................................................. 7
Personal Safety ................................................................................................... 7
Tool Use and Care............................................................................................... 8
Service ................................................................................................................. 9
 SpecicSafetyRules.......................................................................................... 9
Use Proper Extension Cords............................................................................ 10
Grounding Instructions .................................................................................... 10
Additional Precautions For Using The Ecogrinder ............................................. 11
Safety Advice..................................................................................................... 11
How To Grind .......................................................................................................... 12
How To Handle The Grinder ............................................................................. 12
Ecogrinder Operation............................................................................................. 13
Main Connection ............................................................................................... 13
Circuit Breaker................................................................................................... 14
Before Use............................................................................................................... 14
About Double Insulation................................................................................... 16
Laws And Regulations Of Noise Levels.......................................................... 16
Using The Tool ....................................................................................................... 16
Open Surface Grinding..................................................................................... 16
Edge Grinding.................................................................................................... 16
Dust Hose and Bag Installation............................................................................. 17
Ecogrinder Maintenance ....................................................................................... 19
Daily.................................................................................................................... 19
Periodic .............................................................................................................. 19
Bearings And Gears.......................................................................................... 19

3
Replacing And Checking The Carbon Brushes................................................... 20
Grinding Wheel Inspection, Removal, and Installation....................................... 24
Inspecting The Grinding Wheel ....................................................................... 24
Checking The Grinding Wheel For Replacement........................................... 25
Removing The Grinding Wheel........................................................................ 26
Replacing the Grinding Wheel ......................................................................... 27
Installing The Spring Loaded Flange Assembly ............................................ 28
Installing The Grinding Wheel.......................................................................... 29
Fan Belt Removal And Replacement .................................................................... 30
Testing The Unit For Flow ................................................................................ 30
Inner Fan Belt Removal .................................................................................... 31
Inspecting and Cleaning The Fan Belts and Pulleys ..................................... 32
Reinstalling The Inner Fan Belt........................................................................ 32
Removal Of The Outer Fan Belt ....................................................................... 33
Reinstalling The Outer Fan Belt....................................................................... 34
Alpha®Ecogrinder Motor Schematic (ECG-125).................................................. 35
Alpha®Ecogrinder Attachment Schematic ......................................................... 36
Alpha®Ecogrinder Parts List (ECG-125) .............................................................. 37
Services And Warranty Information...................................................................... 41
Loaner Program................................................................................................. 41
Need More Information .................................................................................... 41
Warranty............................................................................................................. 41
Alpha®Tool Repair Service .............................................................................. 42
EC Declaration Of Conformity............................................................................... 43
Appendix A - Manual Height Adjustment Flange Assembly............................... 44

4
ECOGRINDER OVERVIEW
SPECIFICATIONS
Power Supply.............................................................Single-Phase AC, 50/60 Hz
Rating ................................................................................................110/220 Volts
Amperage.................................................................................................10.25/5.1
Power........................................................................................................... 1050W
No-load Speed ......................................................................................8,700 RPM
Wheel Size............................................................................................5” / 125mm
Arbor............................................................................................................. 26mm
(To be used with Spring Loaded Flange Assembly and Drive Plate Adapter)
Arbor...............................................................................................7/8” / 22.23mm
(To be used with Manual Height Adjustment Flange Assembly)
Weight ..................................................................................... 12.70 lbs / 5.76kgs
(Tool w/Hose and Bag)
Cord.......................................................................................................... 10ft / 3m
(Single Phase 2 Conductor)
Figure-1
Protective Grinding
Wheel Cover
Aux Handle
Dust Brush
Edge Grinding
Slide Cover
Slide Cover
Knob
Fan Case
Spindle
Locking Pin
Fan Belt Cover
Power Switch
Power Switch
Lock

5
ACCESSORIES
COMPONENTS:
1. Dust Bag (Part No. 133544)
2. Dust Hose (Part No. 133533)
3. Dust Gate with Anti-Back-Flow Flap (Part Nos. 133530 & 133531)
4. Spring Loaded Flange Assembly (Part Nos. 801375, 801376, 801377, 801378 & 801379)
5. Carbon Brush Set (Part No. 801594)
6. Pin Spanner Wrench 34 mm (Part No. 130434)
7. Top Handle w/Screw & Lock Washers (Part No. 801354)
8. 5” Grinding Wheel w/26mm Arbor (Part No. DSQ0500)
9. Fan Belt Set (Part No. 133508)
10. Manual Height Adjustment Flange Assembly (Part No. 890001)
Figure-2






OPTIONAL
ACCESSORY




6
INTRODUCTION
Thank you for purchasing the Alpha®Ecogrinder. Please read this instruction manual
thoroughly toensure safetyand correctuse ofthis tool. Keepthis manualin aplace where
operators can access it easily whenever necessary.
ABOUT THE SYMBOLS
Accordingtothehazardlevel,allsafetynotesinthismanualareclassiedinto“DANGER”,
“WARNING”,and“CAUTION”.
DANGER! Death or serious personal injury is imminent when handling this
grinder incorrectly.
WARNING! There is a possibility of death or serious personal injury when
handling this grinder incorrectly.
CAUTION! Thereisapossibilityofpersonalinjuryorpropertydamagewhen
handling this grinder incorrectly.
NOTE: In some situations, failing to observe WARNING notes could result in death or seri-
ous personal injury. Be sure to read and observe the safety notes to ensure safety
and correct use of the grinder.
ELECTRICAL SYMBOLS
The following show the symbols used for tool.
V Volts
A Amperes
Hz Hertz
~ or a.c. Alternating Current
n0 No load speed
…/min Revolution or reciprocation per minute
kg Kilograms
Protective Earth

7
CAUTION!
The following are important notes for products, operation, and maintenance applicable to
this polisher.
GENERAL SAFETY RULES
WORK AREA
• Keep your work area clean and well lit. Cluttered benches and dark areas invite
accidents.
• Do not operate power tools in explosive atmospheres, such as in the presence
ofammableliquids,gases,ordust.Powertoolsmaycreatesparkswhichmay
ignite the dust or fumes.
• Keep bystanders, children, and visitors away while operating a power tool.
Distractions can cause you to lose control.
ELECTRICAL SAFETY
• Grounded tools must be plugged into an outlet properly installed and grounded
in accordance with all codes and ordinances. Never remove the grounding prong
ormodifythepluginanyway.Donotuseanyadaptorplugs.Checkwithaqualied
electricianif youare indoubt asto whetherthe outletis properlygrounded. Ifthe tools
shouldelectricallymalfunctionorbreakdowngroundingprovidesalowresistancepath
to carry electricity away from the user.
• Avoid body contact with grounded surfaces, such as pipes, radiators, ranges, and
refrigerators. There is an increased risk of electric shock if your body is grounded.
• Don’t expose power tools to rain or wet conditions. Water entering a power tool
will increase the risk of electric shock.
• Do not abuse the cord. Never use the cord to carry the tools or pull the plug from an
outlet. Keepcordawayfromheat,oil,sharpedges,ormovingparts. Replacedamaged
cords immediately. Damaged cords increase the risk of electric shock.
• When operating a power tool outside, use an outdoor extension cord marked
“W-A”or“W”.Thesecordsareratedforoutdooruseandreducetheriskofelectric
shock.
PERSONAL SAFETY
• Stay alert, watch what you are doing and use common sense when operating
apowertool.Donotusetoolwhiletiredorundertheinuenceofdrugs,alcohol,or
medication. Amoment of inattention while operating power tools may result in seri-
ous personal injury.
• Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your
hair, clothing,andgloves awayfrom movingparts. Looseclothes, jewelry,or longhair
can be caught in moving parts or drawn into air vents.

8
• Avoid accidental starting. Be sure switch is off before plugging in. Carrying tools with
yourngerontheswitchorpluggingintoolsthathavetheswitchon,invitesaccidents.
• Remove adjusting keys or wrenches before turning the tool on. A wrench or a
key that is left attached to a rotating part of the tool may result in personal injury.
• Do not overreach. Keep proper footing and balance at all times. Proper footing and
balance enables better control of the tool in unexpected situations. Do not use on a
ladder or unstable support.
• Usesafetyequipment.Alwaysweareyeprotection.Dustmask,nonskidsafety
shoes, hard hat, or hearing protection must be used for appropriate conditions.
TOOL USE AND CARE
• Use clamps or other practical way to secure and support the workpiece to a
stable platform. Holding the work by hand or against your body is unstable and may
lead to loss of control.
• Do not force tool, use the correct tool for your application. The correct tool will do
the job better and safer at the rate for which it is designed.
• Do not use tool if switch does not turn it on or off. Any tool that cannot be controlled
with the switch is dangerous and must be repaired.
• Disconnect the plug from power source before making any adjustments, chang-
ing accessories, or storing the tool. Such preventive safety measures reduce the
risk of starting the tool accidentally.
• Store idle tools out of the reach of children and other untrained persons. Tools
are dangerous in the hands of untrained users.
• Maintaintools withcare. Keep toolssharp andcleanforbetter andsafer performance.
Followinstructionsforlubricatingandchangingaccessories. Inspecttheelectricalcord
periodically and if damaged, have it repaired by authorized service facility. Inspect
extension cords periodically and replace if damaged. Keep handles dry, clean and
free from oil and grease.
• Check for damaged parts. Before using the tool each day, a guard or other part
that is damaged should be carefully checked to determine that it will operate properly
and perform its intended function. Check for alignment of moving parts, breakage of
parts, mounting, and any other conditions that may affect its operation. A guard or
other part that is damaged should be properly repaired or replaced by an authorized
service centerunless otherwiseindicated elsewherein thisinstruction manual. Have
defective switches replaced by authorized service center. Do not use the tool if it
cannot be turned on and off by the switch.
• Use only accessories that are recommended by the manufacturer for your model.
Accessories that may be suitable for one tool, may become hazardous when used
on another tool.

9
SERVICE
• Toolservicemustbeperformedonlybyqualiedrepairpersonnel.Serviceor
maintenanceperformedbyunqualiedpersonnelcouldresultinariskofinjury.
• When servicing a tool, use only identical replacement parts. Follow instructions in
the Maintenance section of this manual. Use of unauthorized part or failure to follow
Maintenance Instructions may create a risk of electric shock or injury.
SPECIFIC SAFETY RULES
• Accessories must be rated for at least the speed recommended on the tool
warninglabel.Wheelsandotheraccessoriesrunningoverratedspeedcanyapart
and cause injury.
• Hold tool by insulated gripping surfaces when performing an operation where
thecuttingtoolmaycontacthiddenwiringoritsowncord.Contactwitha“live”
wirewillmakeexposedmetalpartsofthetool“live”andshocktheoperator.
• Know your power tool. Read operator`s manual carefully. Learn its application and
limitations,aswellasthespecicpotentialhazardsrelatedtothistool.Followingthis
rulewillreducetheriskofelectricshock,re,orseriousinjury.
• Always wear safety glasses with side shields. Everyday eye-glasses have only
impact resistant lenses; they are NOT safety glasses.
• Protect your lungs. Wear a face or dust mask if the operation is dusty.
• Protect your hearing. Wear hearing protection during extended periods of opera-
tion.
• Inspect tool cords periodically and if damaged, have repaired at your nearest Fac-
tory Service Center or otherAuthorized Service Organization. Constantly stay aware
of cord location.
• Check damaged parts. Before further use of the tool, a guard or other part that is
damaged should be carefully checked to determine that it will operate properly and
performits intendedfunction. Check foralignmentof movingparts, bindingof moving
parts,breakageof parts,mounting, andany other conditionsthat mayaffect itsopera-
tion,A guard or other part that is damaged should be properly repaired or replaced by
an authorized service center.
• Do not abuse cord. Never carry the tool by the cord or yank it to disconnect it from
the receptacle. Keep cord away from heat, oil, and sharp edges. Following this rule
willreducetheriskofelectricshockorre.
• Make sure your extension cord is in good condition. When using an extension
cord, be sure to use one heavy enough to carry the current your product will draw.
An undersized cord will cause a drop in line voltage resulting in loss of power and
overheating.
• Inspect for and remove all foreign objects from workpiece before polishing.
Follow this rule will reduce the risk of serious personal injury.

10
• Drugs,alcohol,medication,Donotoperatetoolwhileundertheinuenceof
drugs, alcohol, or any medication. Follow this rule will reduce the risk of electric
shock,re,orseriouspersonalinjury.
• Keep hands away from polishing area. Follow this rule will reduce the risk of cuts,
scrapes, or serious personal injury.
• Savetheseinstruction.Refertothemfrequentlyandusethemtoinstructotherswho
may use this tool. If you loan someone this tool, loan them these instructions.
USE PROPER EXTENSION CORDS
Use only three-wire extension cords that have three-prong grounding-type plugs and
three-pole receptacles that accept the tool’s plug. Make sure your extension cord is in
good condition. Replace or repair damaged or worn cord immediately. When using an
extension cord, be sure to use one heavy enough to carry the current your product will
draw. An undersized cord will cause a drop in line voltage resulting in loss of power and
overheating. Below table shows the correct size to use depending on cord length and
nameplate ampere rating. If in doubt, use the next heavier gauge. The smaller the gauge
number, the heavier the cord.
Ampere Rating Total length of cord in feet (120V )
25ft 50ft 100ft
More Than Not More Than AWG
0 6 18 16 16
6 10 18 16 14
10 12 16 16 14
12 16 14 12 Not Recommended
GROUNDING INSTRUCTIONS
Thistoolshouldbegroundedwhileinusetoprotecttheoperatorfromelectricshock. Thetool
isequippedwithathree-conductorcordandthree-pronggroundingtypeplugtottheproper
grounding type receptacle. The green (or green and yellow) conductor in the cord is the
grounding wire. Never connect the green (or green and yellow) wire to a live terminal.

11
ADDITIONAL PRECAUTIONS FOR USING
THE ECOGRINDER
In addition to the general safety notes described on the preceding pages, please read
and observe the following precautionary notes before using the Ecogrinder.
DANGER!
SAFETY ADVICE
• PleasenotesafetyinstructionsonPage3-5.
• Donotpiercethemotorhousingasthiscoulddamagethedoubleinsulation.
• Alwaysremoveplugfromtheoutletbeforemakinganychangestothesettingsor
performing maintenance.
• Ensurethetoolisswitchedoffpriortopluggingin.
• Keeppowercableclearfromworkingareaofthemachine.Thepowercableshould
always lead away from you and behind the operating area.
• Beforeuse,checkthemachine,cableandplugforanydamagesormaterialfatigue.
Only authorized service agents should perform repairs.
• Afterswitchingoff,themachinewillnotidledownimmediately.Allowthemachineto
come to a complete stop before putting it down.
• Alwayswearsafetyglassesandearprotectionwhenworkingwiththismachine.It
is further recommended to wear safety gloves, apron, as well as sturdy non-slipping
shoes.
• Onlyusegrindingwheelswhosepermittedspeedisatleastashighasthehighest
no-load speed of the machine.
• Besurewheelsttoolproperlyandsecurely.Donotmodifythetooltoforcetthe
wheel. Do not remove wheel cover.
• Checkgrindingtoolsbeforeuse.Thegrindingwheelmustbeproperlymountedand
turn freely. Perform a test run for at least 30 seconds without any load. Do not use
damaged, out of round or vibrating grinding tools.
• Immediatelyswitchoffthemachineincaseofconsiderablevibrationsorifother
malfunctionsoccur.Checkthemachineinordertondoutthecause.
• Alwaysuseandstorethegrindingwheelsaccordingtothemanufacturer’sinstructions.
Theangeboltmustbetightenedbeforestartingtoworkwiththemachine.
• Theworkpiecemustbesecuredifitisnotheavyenoughtopreventmovement.
• Donotuseemerywheel.

12
HOW TO GRIND
WARNING!
1. During operation, be sure to wear safety glasses and hearing protection.
2. Somedustcreatedwhenusingthisgrindercontainschemicalsknowntocausecancer,
birth defects or other reproductive harm. Some example of these chemicals are:
a. Lead based paints
b. Crystalline silica found in cement, bricks and other masonry products
c. Arsenic and chromium coming from pressure treated wood
d. Pesticides and other chemicals that could have been applied to the work area
3. An approveddust maskthat protectsthe operatoragainst thesechemicals should be
wornatalltimes.Thesedustmasksaredesignedtolteroutmicroscopicparticles.
DANGER!
1. If you accidentally drop the machine, do not use until checking that the machine and
grinding wheel are not cracked, deformed, or damaged.
2. Grindingwheelsusedonthistoolshouldberatedatorabovethenoloadratingmarked
onthistool.Runninggrindingwheelsovertheirratedspeedscanyapartandcause
injury.
CAUTION!
1. Do not press the lock pin while the wheel is rotating.
2. Do not turn the switch on with the lock pin pressed down.
HOW TO HANDLE THE GRINDER
1. It is not necessary to apply more force onto the machine than the force created by the
weight of the machine itself.
2. Applyingexcessiveforcemaydamagethegrindingwheelandburnupthemotor. Such
actionmaydecreasetherotationspeedwhichreducestheefciencyofdustsuction,
because its power is driven by the spindle.
3. Whenusedproperlytheunitshouldoatontopofthebrushring,ifexcessiveforceis
applied the brush will be crushed and wear out.
4. Holdthetoolwithbothhandswhilestarting;thetorquefromthemotorwillcausethe
tool to jerk.
5. The motor and vacuum system should be running at full speed before applying it to
the work surface.
6. Whenthegrindingwheelrstcomesintocontactwiththeworksurfaceorwhenthe
wheel is new, make contact slowly.
7. Keep moving the tool in a circular motion to prevent grooving in the work surface.

13
8. Hold the unit tightly to prevent it from walking, and remove the high spots in the work
surface from the top down.
9. This grinder is designed to be used dry, if the surface is wet the dust will not be able
to pass through the fan and a breakdown will result.
ECOGRINDER OPERATION
CAUTION!
Always be sure that the tool is switched off and unplugged before adjusting or checking
function on tool.
MAIN CONNECTION
Connectonlytosingle-phaseACcurrentsupplyandonlytothemainvoltagespeciedon
the rating plate.
SWITCHING ON AND OFF
CAUTION!
Before plugging in the tool, always check the working voltage and be sure that the voltage
speciedisonthenameplate.Beforeplugginginthetool,alwayschecktoseethatthe
triggerswitchactuatesproperlyandreturnstothe“OFF”position.
Switching on and Off:
Intermittent Use:
Switching on: Press the trigger switch
Switch off: Release the trigger switch
Continuous Use:
Switching on: Press the trigger switch and
then the locking button, then release the
trigger switch
Switching off: press the trigger switch, then
release
On/Off Trigger Switch
Figure-3
Locking Button
On/off Switch and Locking Button

14
CIRCUIT BREAKER
CAUTION!
If the tool stops during operation you need to switch the unit off before resetting the circuit
breaker. Resetting the circuit breaker with the trigger lock on can cause an accident.
Note: Ifthecircuitbreakerstopsthetoolrepeatedly,thiscouldbeanindicationthatexcessive
pressure is being applied to the tool, slowing the motor and causing it to overheat.
Use less force and allow the tool to do the work. The circuit breaker can also trip, if
the carbon brushes are completely worn and need to be replaced.
The Ecogrinder is supplied with an in-line circuit breaker. In the event that the breaker is
tripped,push thebutton toreset. Onceyou areable toreset thecircuitbreaker,run thetool
in a no-load condition allowing air to pass over the motor and cool it down.
BEFORE USE
DANGER!
Beforeusingthe machine,check thefollowing items. Inparticular,check items1 to5 before
plugging the power supply cord into the power outlet.
1. Check the working voltage.
– Besurethevoltagespeciedontheratingplateisthevoltageavailableatthe
poweroutlet.Ifthemachineisusedwithhighervoltagethanspecied,themotor
will burnout. Any attempts to do so may damage the polisher and/or cause an
accident.
In-line Circuit Breaker
Reset Button
Figure-4

15
2. Make sure the ON/OFF switch is off.
– If you plug in the power supply cord without realizing that the switch is ON, the
machinewillstartandmaycauseanaccident.Makesuretheon/offswitchtrigger
is out and the locking button is not engaged.
3. Inspect the protective wheel cover.
– Do not remove the wheel cover. It will protect you if the grinding wheel
breaks.
– Besuretormlyattachthegrindingwheeloranyoptionalaccessory.
4. Inspect the grinding wheel.
– Checkifyouhaveaspeciedwheel.
– Never use cracked, chipped, or any damaged wheels.
– Followtheproceduresspeciedintheinstructionmanualtoproperlyattach
applicable accessories.
5. Check the power outlet.
– When the plug of the power supply cord is easily pulled out of the power outlet,
theoutlet should bereplaced. For suchtask, consultan electrician. Ifthe power
outlet is used on a continuous basis, it may overheat and cause accidents.
6. Perform test runs.
WARNING!
1. Before turning the switch ON, make sure the rotating parts are not touching
anything. If the switch is turned ON while they are in contact with anything
else, the wheel may get damaged and may cause injuries.
2. When a new wheel is attached and the switch is turned ON, keep your body
well away from the exposed sides of the wheel for a moment until the machine
reaches its full speed.
It is very dangerous to perform grinding operations using cracked, chipped or damaged
wheels. Beforestarting grindingoperations, keepthe wheelaway fromanyone nearby.Be
sure to perform a few test runs to check whether there are any abnormalities.
Test run duration:
• After replacing a wheel..........……………………at least 3 minutes
• Before starting operations each day...................at least 1 minute

16
ABOUT DOUBLE INSULATION
This machine is designed with double insulation. Two insulations are used between the
conductorandtheouterbodyofthemachine. Anelectricmachinewiththedoubleinsulation
highlyimprovessafetyfromelectricshocks.Donotattachorreplaceunspeciedpartsand
do not assemble incorrectly. This may cause the insulation to malfunction.
LAWS AND REGULATIONS OF NOISE LEVELS
Pleaseobserve locallaws andregulations regardingnoise levelinorder toavoid disturbing
surroundingareas.Installasoundproofwallifrequiredtocomplywiththelocallawsand
regulations.
USING THE TOOL
OPEN SURFACE GRINDING
Under normal operation, the slide cover assembly should remain in the closed position,
shielding the grinding wheel inside the protective housing. (See Figure 5)
Slide Cover Assembly closed
Slide Locking Knob Nut
Figure-5 Figure-6
Slide Cover Assembly Closed/Open
Slide Cover Assembly open
EDGE GRINDING
CAUTION!
When you grind close to a wall, turn the locking knob nut counter clockwise to loosen and
slide the cover all the way open. Turn the locking knob nut clockwise to tighten.
When edge grinding and the slide cover assembly is open, the front of the tool should be
heldagainst thewall tocontainthe dustand smallfragmentsinside ofthe protectivewheel
cover. Caution should be taken because small fragments can rebound off of the wall into
the operator.

17
With the slide cover as-
sembly open, the unit can
now be pushed up against
the wall allowing the hous-
ing to ride along the edge.
(See Figure 6: Slide Cover
Assembly Open). With the
slide coverassembly open,
extra care should be taken
toholdtheunitattoprevent
grooving along the wall.
Edgegrindingwillworkbestwithour5”grindingwheel.Thiscongurationallowsyouabout
1mm clearance between the grinding wheel and the wall.
DUST HOSE AND BAG INSTALLATION
1. Installtheback-owpreventer
assembly to the Ecogrinder
exhaust port, with the dust gate
intheuprightposition,soap
willclose whenthe toolis turned
off.
2. Slide the dust hose onto the
backowpreventerassembly,
twist and turn until the hose is
up against the shoulder of the
back-owpreventerassembly.
Dust Gate
Figure-8
Back-Flow Preventer w/Dust Gate
Dust Hose
Back-owPreventer
Assembly Shoulder
Figure-9
Back Flow Preventer Assembly and Dust Hose
Figure-7
Edge Grinding / 1mm Wall Clearance 1mm

18
3. With the dust hose attached
to the tool, you can now install
the dust bag onto the dust bag
holder.
4. Openupthehookandloopstrap
and slide the hose end into bag
until the end of the bag is even
with shoulder on the hose end.
Tighten the hook and loop strap
so the strap is behind the raised
liponthehosetting.
5. When in use, the dust bag and
hoseshouldlieatontheground.Whenthebagisnewitwillnotinate
immediately.Astheporesinthebagbecomeclogged,thebagwillstarttoinate.
Note:Asthebagllsupandcreatesbackpressure,thesuctionwilldecrease.Whendust
is not being removed from the work surface, you should check the fan belts and/or
replace the bag.
Hook & Loop Strap
Dust Bag Hose
Shoulder
Dust Bag Holder Raised Lip Figure-10
Dust Bag Holder and Dust Bag
Figure-11
Hose Fitting with Hook & Loop Strap Secured
Figure-12
Dust Bag

19
ECOGRINDER MAINTENANCE
DAILY
1. Beforedailystart-upinspectgrinder,powercord,circuitbreakerassembly,andgrinding
wheel looking for chips and cracks. Inspect the dust bag for holes or if it is full and
needs to be replaced.
2. If damage has occurred, repair affected areas before use.
3. Turntheunitontoensurethatthefanisrunningandthedustbagisinating.Anew
bagwillnotinateuntiltheporesinthematerialstarttollwithstonedust.
4. After daily use of the tool, clean and blow off the exterior of tool and around air intake
vents on rear handle.
PERIODIC
WARNING!
Preventivemaintenance performedby unauthorizedpersonnel mayresult inmisplacing of
internalwiresand/orcomponentswhichvoidsthewarrantyandcouldcauseserioushazards.
We recommend that tool service and repairs not covered in the manual be preformed by
an Alpha®Authorized Repair Center.
Periodic maintenance is done to check the tool and to minimize down time. These checks
aredone basedon hoursof operationand operatingconditions. Operatingconditions can
vary depending on the work surface and job being preformed. If the tool is not used for a
long period of time, the carbon brushes should be checked and the commutator cleaned,
before putting the tool back into operation.
BEARINGS AND GEARS
To minimize your tool’s down time and expensive tool repairs, it is recommended to send
the tool back to anAlpha®Repair Center after about 300 to 400 hours of operation or every
second carbon brush change. The bearings should be replaced and the gears should be
checked. Ifyourtoolstartstosounddifferently,thiscouldbeanindicationofawornbearing.
Continuing to use the tool in this condition could result in overheating or motor failure.

20
REPLACING AND CHECKING THE CARBON BRUSHES
In order to keep your tool running correctly, you need to check your carbon brushes after
everyone hundredhours ofuse. Carbonbrushes wearout overtime basedon thegrinder’s
usage. Ifacarbonbrushiswornout,it may causethemotortomalfunctionorfailto run. The
carbon brushes should be replaced before the twisted wire reaches the bottom of the slot.
DANGER!
Besuretounplugthepower cordfromtheoutletbeforeservicing theunit,topreventelectri-
cal shock or starting the tool accidentally.
1. Remove the four self-tapping Phillips screws holding on the rear handle.
2. Split handle and turn it on its side to get access to the carbon brush holder. Remove
the small Phillips screw to remove the carbon brush holder.
4 Self-tapping Screws in handle
Carbon Brush
Coil
Spring
Carbon
Brush Holder
Phillips
Screw
Motor
Housing
Figure-13
Figure-14
Handle Removal / Selt-tapping Screws
Carbon Brush Assembly Parts