Montgomery Ward MX-27129A User manual

HOMESTANDBY
ELECTRIC GENERATING SET
owner's guide
and PARTS LIST
MODEL NO.
MX-27129A
FORMNO.
89M-619B*
DEPT.j
READTHISMANUALCOMPLETELYBEFOREBEGINNINGINSTALLATION

SAFETY PRECAUTIONS
Thefollowingsymbolsinthismanualsignalpoten-
tiallydangerousconditionstotheoperatororequip-
ment.Readthismanualcarefullyandknowwhen
theseconditionsexist.Then,takenecessarystepsto
protectpersonnelaswellasequipment.
uiADuiuni Thissymbolis used through-
WA«mnu|
outthjsmanua|towarn of
possible serious personal injury.
This symbol refersto possible
equipmentdamage.
Listedbelowaresomegeneralprecautionsofpoten-
tialhazardswhichcouldresultinserious,personal
injury.Takecareinfollowingrecommendedproce-
dures.
•UseExtremeCautionNear Gasoline, Gaseous
Fuel and Diesel Fuel. A constantpotentialexplo-
sive or fire hazard exists.
Donotfillfueltanknearunitwithenginerunning.
Donotsmokeoruseopenflameneartheunitor
thefueltank.
Havea fireextinguishernearby.Besureextin-
guisherisproperlymaintainedandbefamiliar
withitsproperuse.ExtinguishersratedABCby
theNFPAareappropriateforallapplications.
Consultthelocalfiredepartmentforthecorrect
typeofextinguisherforvariousapplications.
•GuardAgainst Electric Shock
Disconnectallpowerandremovestartingbattery
cablesbeforeattemptinganymaintenanceor
service.
DONOTTOUCHelectricalequipmentwhileon
damporwell-groundedsurfaces.Userubber
insulativematsplacedondrywoodplatforms
whenworkingaroundelectricalequipment.Do
notweardampclothing(particularlywetshoes)
orallowskinsurfacestobedampwhenhandling
electricalequipment.
Jewelryisagoodelectricalconductorandshould
beremovedwhenworkingonelectricalequip-
ment.
Useextremecautionwhenworkingonelectrical
components.Highvoltagescauseinjuryordeath.
Followallstateandlocalcodesduringinstalla-
tion, operationandservice.Haveallelectrical
installationsandserviceperformedbya qualified
electricianorauthorizedservicerepresentative.
DoNotSmokeWhile Servicing Batteries.
Leadacidbatteriesemita highly-explosive hyd-
rogengaswhichcanbeignitedbyelectricalarc-
ing, anyflame,smoking,etc.
Keep theUnit Clean.
Removealloildepositsfromthecompartment
baseandtheunit.Accumulatedgreaseandoilon
theunitcancauseoverheating(andsubsequent
enginedamage)andmaypresenta potentialfire
hazard. Disposeofoilyrags.
Keepleaves,grassorweedsmowedaroundthe
compartmentarea.Obstructedairinletsoroutlet
cancauseunitoverheatingandincreasethe
potentialhazardofa fire.
Periodicallycheckscreenstoensuretheyare
securelyattachedtoprevententryofsmallanim-
als, debris,andhandsandfeetofchildren.
ProtectAgainst Moving Parts ofUnit
Avoidmovingpartsoftheunit.Donotwearloose
jackets,shirtsorsleevesduetodangerofbecom-
ingcaughtinmovingparts.
Makesureallnutsandboltsontheunitare
secure.Tightenallsupportsandclampsperiod-
ically.
Ifyoumustmakeadjustmentswhiletheunitis
running, useextremecautionwhenclosetohot
manifolds,movingparts,etc.
Donotworkonthisequipmentwhilementallyor
physicallyfatigued.
Keephousinglockedatalltimes.
Guard AgainstCarbon Monoxide
Donotoperateunitnearanopenwindowordoor.
Carbonmonoxidemaycausesicknessordeath.

TABLE OF CONTENTS
TITLEPAGE
Specifications
2
General Information 3
Installation4
Operation10
Periodic Maintenance15
Adjustments 20
Engine Troubleshooting24
Parts Catalog• 25
WARNING
]
TO AVOID POSSIBLE PERSONAL INJURY OR
EQUIPMENT DAMAGE, A QUALIFIED ELECTRI-
CIAN OR AN AUTHORIZED SERVICE
REPRESENTATIVE MUST PERFORM IN-
STALLATION AND ALL SERVICE.

SPECIFICATIONS
Dimensions- MX-27129A
Hejght
30-1/8in.(765mm)
Width.!!'. 33-13/16in.(859mm)
Length!!!!!!!!!!!!!!!!!!!!
48-5/8in-c-24mm)
NumberofCylinders2
Bore3-1/4in.(82.6mm)
Stroke3 in-(76-2mm)
Displacement49.8cuin.(716cucm)
CompressionRatio7.0to1
Compression(sealevel)105to110psi(7.38to7.7.3kg/sqcm)
EnginePower(1800rpm)10.2BHP(7.61Kilowatts)
Lubrication
FullPressureLubricationYes
OilCapacity4 u s- quarts (3-8'•*>
FuelSystem
Carburetor(CombinationGas-Gasoline)Downdraft
ChokeElectric
FuelTankCapacity(whereused)5 U.S.gallons(18.9lit)
Governor(withvacuumbooster)Enclosed,mechanicalflyball
GovernorRegulation5 percent
Ignition12-volt,battery
StartingElectric
BatteryRecommended
SAEGroup6012Volt
360ColdCrankingAmps(74A/Hr)
Generator
BasicDesignRevolvingarmature,4-pole
Rating(inwatts)5000Watts
BatteryChargeRate(FixedTwoStep)2 Amp& 5 Amp
FrequencyRegulation(no load, tofullload)5 percent
TUNE-UP SPECIFICATIONS
BreakerPointGap(fullseparation)0.020in.(0.51mm)
SparkPlugGap
Gasoline0.025in.(0.64mm)
Gaseous0.018in.(0.46mm)
IgnitionTiming19°BTC
CarburetorFloatClearance(betweenfloatbowlgasketandfloat)1/4in.(6.35mm)
ValveTappetClearance(enginecold)
|ntake0.006to0.008in.(0.15to0.20mm)
Exhaust0.015to0.017in.(0.38to0.43mm)
TORQUE SPECIFICATIONS*
CylinderHeadBolts29-31ft-lb(39.4to42.2N«m)
ManifoldScrews: ""take15-20ft-lb(20.4to27.2N»m)
Exhaust14-17ft-lb(19.0to23N»m)
*Torquewhenengineis cold. Becarefulnottostripthreads.

GENERAL INFORMATION
HOME STANDBY GENERATING SET
Thisunitisdesignedforhomestandbyapplications.
Uponreceiptofyourunit,checkitthoroughlyforany
damagethatmayhaveoccurredduringshipping.
Tightenlooseparts,replacemissingparts,andrepair
anydamagebeforeputtingtheunitintooperation.
Identifythemodelofyourunitbyreferringtothe
modelandspecificationnumbershownonthename-
plate. Electricalspecificationsareshownonthe
lowerportionofthenameplate.Thenameplateison
therightcylinderairhousingshroud.
YOUR MANUAL
Thismanualgivesyouoperationandmaintenance
instructionswhichcanhelpyoutokeepyourunit
runninglikenew.Readitcarefully.Remember...any
machine,regardlessofdesignortype,willperform
onlyinrelationtotheservicesitgets.
Throughoutthismanual,engineendisconsidered
frontofthegeneratingset.Leftandrightaredeter-
minedwhilefacingtheengineend.
Whereapplicable,metricequivalentappearsInparentheses fol-
lowingU.S.customaryunit.
EXPLANATION OFTHE MODELNUMBER
Followingisatypicalmodelnumberwithanexplana-
tionofthevariousparts.
5.0MX-27129 3CR / 21929
1. Kilowattratingofthegeneratingset.
2. Identificationofgeneratingsetseries.
3.Voltagecodeofgenerator.Number3 iscodefor
120/240volts,singlephase."C"indicatesthe
generatorcanbeconnectedfor120volts,2 wire;
240volts,2 wire;or120/240volts,3 wire.
4. Indicatestypeofstarting.
R—Remoteelectricstarting,atthegeneratingset
orremotestartingfromremotelocation.
5.Factorycodeforidentifyingoptionalequipment.
6.Specificationletterwhichadvanceswithfactory
productionmodifications..
OPTIONAL ACCESSORY ITEMS
MontgomeryWardcarriestwotypesoftransfer
switchesforusewithyourMX-27129standbygener-
atingset.A manualtransferswitch(orderarticleno.
89-27134)oranautomatictransferswitch(order arti-
cleno.89-27135)areavailabletocompleteyour
homestandbygeneratingsystem.Themanual
transferswitchkitenablestheowner/operatorto
switch, uptofourpossiblecircuits,toemergency
powerduringa utilitypoweroutage.Thetotalcircuit
loadrequirementsmustnotexceedthenameplate
ratingoftheMX-27129emergencypowergenerator
setwhichis5000watts.Themanualtransferswitch
kitisdesignedforindoorwallmountingpreferably
nearthemainpowerdistributionpanel.Theauto-
matictransferswitchisalsodesignedforindoorwall
mountingnearthemainpowerdistributionpanel.
Theautomatictransferswitchwillautomaticallystart
theemergencystandbygeneratorsetandassumethe
load(preselectedbythehomeownerpriortoinstalla-
tion)ofthetransferswitch.Maximumcurrentrating
oftheautomatictransferswitchis30amperes.Both
switchescomewithcompleteinstallationandoperat-
inginstructions.
WARNING Installationofthemanualswitchkitand
optionalcablekitmustbeperformedbya
qualifiedlicensedelectricianandinspectedaccordingtoalllocal
andstateelectricalcodes.

INSTALLATION
A QUALIFIED ELECTRICIAN, ELECTRICAL CONTRACTOR ORAUTHORIZED
SERVICE REPRESENTATIVE SHOULD INSTALL HOME STANDBY GENERAT-
INGSET.
GENERAL
TheMX-27129homestandbygeneratingsetisa
completelyself-containedunit,enclosedina com-
partment.Observesafetyprecautionsandlocalelec-
tricalcodesduringinstallation,operationand
service.
LOCATION
Chooseaninstallationareanearthebuildingandas
closeaspossibletothetransferswitch.Thearea
mustbelevel,dryandaccessibleforservice.Referto
localcodesfordistancefromthebuilding,distance
fromwindows,ordoors,etc.SeeFigure1.
WARNING Donotsit,stand,orplaceladderorother
equipmentonhousing.Housingmaybreak
causingseriousinjury.
CAUTION Replacehousingifcracked.Excessivemois-
ture, dirt,etc.,mayaccumulatewithinhous-
ingcausingdamagetoengine-generator.
WARNING Donotoperateunitnearahopenwindowor
door.Carbonmonoxidemaycausesickness
ordeath.
Shrubs,bushes,treesorgrassmustnotobstructthe
airinletsoroutletonthegeneratingsetcompart-
ment.Figure1 showsa typicalinstallation.
1. Althoughthecompartmentbaseisdesignedto
restdirectlyontheground,youmightpreferto
KEEPTHIS
AREACLEAR
OFSHRUBS
FIGURE1.TYPICALHOMESTANDBYGENERATINGSETINSTALLATION

MlO
M2O
M3 6
M4Q
TRANSFER
SWITCH MlO-
120V
M2
M3O
120V
M4O
r y0
^!
-TRANSFER
SWITCH
120V
120V
1
-LINE
120V
ONLYWHEN
CONNECTED
TOGEN.
L
O
A
D
FIGURE2.LOADCONNECTIONSAVAILABLE
makea baseofconcrete,rock,gravel,etc.,to
preventgrassorweedsfromgrowingaroundthe
compartment.Ifso,makethebaseatleast4
inches(100mm)largerinperimeterthantheunit.
SeetheSPECIFICATIONSsectionforunitdimen-
sions.
2. Unlatchthehousinglatchontherearsideofthe
housingpanel(wood).SeetheOPERATIONsec-
tionforunlatchingandopeninghousing.
3.Slidethehousingforwardandofftheunit.
Slidingthehousingofftheunitismucheasierthantryingto
liftoffthehousing.
4. Withsufficientmanpoweroramechanicallift,set
thegeneratingsetcompartmentonthebaseof
concrete,crushedrock,gravel,etc.
Ifotherthana concretebase,besure4x4inch(102 x
102mm)compartmentredwoodbasepiecesrestsquarelyon
thebasematerial.
5.Removetheshippingblocksundereacnsideof
thegeneratingsetbeforestartingisattempted.
CAUTION Ifshippingblocksarenotremovedbefore
generatingsetoperation,damagecouldoc-
curtotheunitmounts.
LOAD WIRING
Thegeneratingsetnameplatelocatedontheright
cylinderairhousingshroudgivesratedoutputin
watts, volts,phase,kVAandpowerfactor,amperes,
andhertz.GeneratorCode"3C"meansyoucan con-
nectthegeneratorfor120volt,2 wire;or120/240
volts, 3 wire.Figure2 showsthegeneratorload con-
nectionsavailable.
Allloadwiringandelectricalconnectionsmustbeinspectedbya
qualifiedservicemanorelectrician.
Loadconnectionsarelocatedonthesideofthe gen-
eratorbehindthecontrolbox.Removecontrolbox
coverforaccesstoloadconnections.SeeFigure3.
Loadwirescanexitthroughtherearorthefloorofthe
compartment.
Connecteachwiretothecorrectgeneratoroutput
wire. LeadsaremarkedMl,M2,M3,andM4.Each
correspondstomarkedleadsonthewiringdiagram
andthoseshowninFigure 2. Insulatebareendsofthe
wires.
Werecommendusingwatertight,flexibleconduit
betweenthebuildingconnectionandthegenerating
set.Ifrigidconduitisused,a minimumof1 foot
(305mm)flexibleconduitatthegeneratingsetmust
beused.
~FLEXIBLE
/CONDUIT
EXITLOADWIRES
THROUGHHOLES
PROVIDED
CONTROLBOX
FORLOADCONNECTIONS
(REMOVECOVER) ES-1021
FIGURE3.GENERATINGSETLOADCONNECTIONS

Thishomestandbygeneratingsetisinherentlyprotectedby
designagainstdamagetothegenerator,transferswitchandfeeder
conductors(ifproperlysized).Ifa shortcircuitorlargeoverload
occurs,generatoroutputdropstozeroandnodamageresults.
GROUNDING
WARNING Failuretogroundthegeneratingsetcould
resultinseriouselectricalshock.
Connecta #8wireorlarger(followingapplicable
codes)between:
1. A separategroundpipeorrodpenetratinginto
moistearth,and
2. thesolderlessconnectorwhichislocatedontop
ofthegeneratorfortheremotestartmodelsand
onthestart-stopcontrolboxfortheelectricstart
models.
WARNING ^TheNationalElectricalCode(NEC)requires
thatallseparatelyderivedACsystemsbe
groundedperArticle250-26.Manufacturerhasaddeda bonding
jumperperarticle250-26(a)fromthenoncurrentcarryingmetal
partstotheconductortobegrounded.Manufacturerdoesnot
supplytherequiredgroundingconductororgroundingelectrode
becauseitwouldbeimpossibletocovereveryexceptionandall
localcoderequirements.SeeyourlocalcodesandtheNECman-
ualforthepropergroundingforyourapplication.
Asa generalrule,donotuseelectricalequipmentinwetordamp
areas. Forconstructionsites,additionalrulesapplytoportable
alternatorswhenusedonconstructionsites,fromNEC,OSHAand
statecodes.Itistheresponsibilityoftheconsumertomeetthese
requirements.
GASOLINE TANK, HOLDER AND HOOD
Instructionsforinstallationandconnectionsforgaseousfuelare
includedwiththegaseousfuelpackage.
Theremotestartgas-gasolinemodelincludesagaso-
linetankbracketandtankhoodformountingthe
gasolinetankontherearofthecompartment.Usethe
followinginstructions.
1. Facingtherearofthecompartment,removethe
bottom, middlelagboltandwasher.SeeFigure4.
Donotdiscardtheboltorwasher.
2. Mountthegasolinecanbracketwiththeonelag
boltandwasherjustremoved(fromStep1)and
twohexhead5/16-18screws,flatwashers,lock
washerandnutsasshowninFigure4.Holesin
thepanelarealreadydrilledforthetopscrews.
3.Placethegasolinetankinthetankbracketsothe
tankcapisontheleftasyoufacetherearofthe
compartment.
4. Connectthefemaleconnectorontheendofthe
suppliedfuellinetothetankcapmaleconnector.
Pullthefemaleconnectorsleeveback,insertand
TANKHOLDER
5/I6-IN. SCREWS,FLAT
WASHERS.LOCKWASHERS
ANDNUTS.
MIDDLELAGBOLT
ANDWASHEROF
COMPARTMENTREAR
FIGURE4.INSTALLATIONOFGASOLINE
TANKHOLDER
holdoverthemaleconnectorandrelease.See
Figure5.
Besuretoconnectthefemaleconnectoronthefuellinetothe
tankcapbeforeroutingfuellinetofuelpump.Otherwise,you
mightaccidentallyplacetheconnectorontheinsideofthe
compartment.
FEMALECONNECTOR
FORGASOLINELINE
(NOTESLEEVEIS
MALESt.PULLEDBACK)
CONNECTOR
TANKCAP
5.
6.
7.
8.
FIGURE5. CONNECTIONOFFEMALE
CONNECTORTOTANKCAP
Runthelooseendofthefuelline(opposite con-
nectorend)throughthesmallholeontherearof
thecompartment.Figure6 showswhereline
entersinsidecompartment.
Slipthehoseclampoverthelooseendofthefuel
line(nowinsidethecompartment).SeeFigure6.
Connecttheendofthelinetotheunusedconnec-
toronthefuelpump(Figure6).Movetheclamp
neartheendofthefuelline(overfuelpump
connector).
Installthegasolinetankhoodwithfour 1/4-20
screws,flatwashers,lockwashersandnuts.
Mountthehoodsothehingesfacedownandwill

FUELPUMP
TOGENERATORSET
FS-1082
FIGURE6.FUELPUMPCONNECTIONS
becoveredwhenthehoodisdown.SeeFigure7.
Holesarepre-drilledinthepanel.
9.Tolockthegasolinetankshield,pushdownon
theshieldandslidethebarrelboltlock,onthe
insideofthecompartmentpanel,throughthe
holeoftheshieldpartwhichextendsthroughthe
panel. SeeFigure7.
REMOTE START-STOP CONNECTIONS
Theremotestart,homestandbymodelhasprovi-
sionsforremotestartandstopconnections.Locate
theremoteswitchinthehouse,garageorother con-
venientlocationforstartingandstoppingthegener-
atingset.
Forremoteconnectionstoanautomatictransferswitchwhich
automaticallystartsandstopsthegeneratingset,refertoinstruc-
tionsfurnishedwiththeautomatictransferswitch.
Fortheremoteswitch,usea single-pole,double-
throw,momentarycontact,center-offtypeswitch.
Youcanuse#18wirefordistancesupto250feet(76
meters)fromthegeneratingset.Severalremote
switchescanbeusedindifferentlocationsiftheyare
wiredinparallel.
Usea momentary-contact,start-stopswitchonly.Otherwise,the
exhaustblowerusedforthegas/gasolinemodelrunscontinuously
duringtheentireoperationperiod(afterremotestarting).
Remoteconnectionstothegeneratingsetaremade
accordingtoFigure 8. A wiringharnessrunsfromthe
connectorlocatedonthesideofthecontrolboxto
thetimedelaycontrollocatedontherearpanelofthe
housing(Figure13).Customerwiringisfromtime
delaycontroltotheremotemomentarycontact
switch.
1/4-20 SCREWS,FLATWASHERS,
LOCKWASHERSANDNUTS
BARRELBOLTLOCK
(LOCATEDINSIDE
COMPARTMENTPANEL) TANKHOOD
FIGURE7. FUELTANKHOODINSTALLATION
7

CONTROLBOXON
COMPARTMENTPANEL
(REMOVECOVER)
EXITREMOTE
START-STOPWIRES
THROUGHTHISOPENING
REMOTE
OPERATION
CONNECTOR
OCOH TROI— REMOTE
a
MOMENTARY
CONTACTSWITCH
SC-1036
FIGURE8.REMOTECONNECTIONONREMOTESTARTMODEL
BATTERY INSTALLATIONAND
CONNECTIONS
Thebatterycables,batteryhold-downframeand
hardwareareshippedloosewiththegeneratingset.
Battery Cables
Removeandsetthegasolinetankalongtheedgeof
thecompartment(itisnotnecessarytodisconnect
fuelorventlines)foreaseofconnections.
1. Removecontrolboxcover.
2. Inserttheeyeletterminalofthelongbatterycable
(positive+)throughthegrommetonthebottom
ofthecontrol.SeeFigure9.
3.Removetherightnutandwasherfromthestart
solenoid.
4. Connecttheeyeletterminalofthelongbattery
cabletothisterminalandreinstallthenutand
washer.
5.Reinstallthecontrolboxcover.
6.Setandsecurethegasolinetankbackinthe
compartment.
7.Removethethroughboltfromthegenerator
showninFigure10andconnecttheshortbattery
cable(negative-)eyeletterminal.Besure con-
nectioniscleanandtightafterreinstallingthe
throughbolt.
BATTERS
POSITIVE(+)
CABLE
FIGURE9.POSITIVEBATTERYCABLECONNECTION

NEGATIVE
BATTERY
CABLE
(GROUND)
POSITIVEBATTERYCABLE
FIGURE 10. NEGATIVEBATTERYCABLECONNECTION
HOLDDOWNSTUD,
WASHERS AND NUTS
FIGURE 11. BATTERYINSTALLATION
ANDCONNECTIONS
FINAL CHECKSBEFORE OPERATION
Afterinstallation is complete,perform the following
checks.Thenread the OPERATIONandPERIODIC
MAINTENANCEsectionscompletelybeforestarting
yourgenerator set.
Battery
Setthebattery in thebatterytrayonthecompartment
base (see SPECIFICATIONSsection for recom-
mendedbattery).SeeFigure 11. Hookthetwobattery
hold-downstudsinto the batterytray.Install thetop
batteryhold-downframeonto thetop edges ofthe
battery,with the hold-downstuds up through the
holes ofthetop frame.Secure the batteryframewith
thetwo5/16-inchflatwashers,lockwashersandnuts.
Battery Connections
Beforemakingthebatteryconnections,addtheelec-
trolyteandchargethebatteryfollowingthemanufac-
turer'sinstructions.Makesure you have the battery
terminalcontactareasclean.Connect the battery
cables as shown in Figure 11 positive (+) battery
cable tothe positivebatteryterminal, andthe nega-
tive (-) batterycable tothe negativebatteryterminal.
Coattheterminalconnectionswithmineralgrease or
petroleum.
If the batterycablesareaccidentallyreversed, the enginewillstart
andrun, but batterywilldischarge.
1. Check oil level of engine andair cleaner. Oilfor
engineshouldshowfull onoil levelindicator.
2. Checkfuelsupply(gasolinefuel).
3.Check load, and remotewiringconnections. See
Figures 2 and 8.
4. Checkbatteryconnections for correctpolarity
(negativegroundonly)andcheckbatteryelectro-
lytelevel.
5.Refer tothe OPERATIONsection.Test the gen-
erating setfor starting,running and stopping.
6.Close the compartment.
7.With a goodpadlock(onewhichwillresistcorro-
sion and freezing),lock the housinglatchhinge
to the hasp onthe rearwall ofthe compartment.
WARNING Thegeneratorsetownershouldbecomethor-
oughlyfamiliarwith the start-stopcontrols,
manual or automatictransferswitchoperationandroutineperiod-
icmaintenanceitems to ensuretheset'soperation in theevent of a
poweroutage.Readyourowner'smanual and takenote ofthe
recommendationsregarding theuseof light-weight oilfor cold
weatheroperation,importance of periodicallyrunning(exercis-
ing) the unit to keep the batterycharged and preventstalefuel
(varnishbuild-up) in carburetor.Alsokeep all leaves,grass and
weeds or shrubsfromobstructing anyair inlets and outlets and
keeptheunitfueledandready for immediateoperationatalltimes.

\;
OPERATION
TO OPEN THE UNIT
IfyouaregoingtostartthegeneratingsetandthereIsa remote
start-stopswitchInthehouse,garage,etc.,ItIsunnecessaryto
openthecompartment.
Withanautomatictransferswitchforremotestartmodels,the
generatingsetIsautomaticallystartedwhena poweroutage
occurs,andtheloadIsautomaticallytransferredtotheset.When
normalpowerretums,theloadIsautomaticallytransferredbackto
theutilitypowersourceandthegeneratingsetisstopped.Youcan
opentheunitandstartthegeneratingsetusingtheseinstructions
forexercising,testing,etc.,ifyoudesire.
1. Removethelockfromthelockhaspontherearof
thehousing(Figure12).
2. Afterthelockisremoved,setthehaspsoitrests
ontopofhousing.Donotopenhousingby pul-
lingonhasp.
HOUSING
LIFTLOCK
HASPBEFORE
ATTEMPTING
TOOPENHOUSING
FIGURE12.COMPARTMENTLOCKHASP
3.Standdirectlyinfrontofthehousing,graspingit
betweenthetopventandhousingtop.SeeFigure
13. Pullittowardyouina levelplane(butnotall
thewayoff).Restthefrontofthehousingonthe
ground, leavingthesidesofthehousingstillin
theguides(trimmolding).
BEFORE STARTING
Beforestarting,readthesehelpfulmeasuresand
reminders.
1. Be sure the crankcase has been filled with oil to
the FULL mark on the oil fill indicator (see To
Check Oil Level on page 13) and has a full fuel
tank, if gasoline fueled (see Gasoline Fuel).
CONTROLBOXON
COMPARTMENTPANEL
(REMOVECOVERJ 1
EXITREMOTE
START-STOPWIRES
THROUGHTHtSOPENING
PULLHOUSING
STRAIGHTFORWARD
(NOTALLTHEWAYOFF)
ANDRESTHOUSINGFRONT
ONGROUND
FIGURE13.OPENINGTHEHOMESTANDBYUNIT
WARNING Removegasolinetankfromsetbefore
filling. Neveropenorfilltankwhensetis
runningorhot.Possiblepersonalinjuryordeathmayresult.
Bothproceduresaredescribedneartheendofthissection.
2. Besuretheairinletsandoutletaroundcompart-
mentarenotobstructedbygrass,leaves,etc.See
Figure14.
OUT
AIR
INLETON
COMPARTMENTBOTTOM
FIGURE14.COMPARTMENTAIRINLETS
ANDOUTLET
10

CAUTION Obstructedairinletsoroutletcancause
unitoverheating.
3.Operatethegeneratingsetwiththecompartment
fullyinplace.
CAUTION IIcompartmentIsnotclosedcompletely
duringoperation,theunitdoesnotre-
ceiveenoughcoolingairandcouldoverheat.
4. OperationwithGasoline:Aninitialfullfueltank
shouldenablethegeneratingsettooperatefrom
5to8 hoursbeforerefillingisneeded.Always
refillthetankafteranoperationcycle.
TO START THE UNIT
Starting and stopping instructions vary for the two
basic starting methods. Ifyour home standby unit has
aremote start-stop switch in the house, garage, etc.,
as shown in Figure 15, proceed to instructions given
under Remote Starting.
If your home standby unit start-stop control in the
compartment is likethatshown in Figure 16, proceed
to instructions given under Starting at Compartment.
OnceyoudeterminewhichInstructionsapplytoyourmodel,puta
checkmark(•)bythoseInstructions.
WhenstartingIsattemptedusingthefollowinginstructions,crank
theunitforabout15secondsatonetime.IfItdoesnotstart,waita
halfminuteandtryanotherstart.IftheunitIsneworhasnot
operatedforsometime,startingmightnotoccurimmediatelydue
tolackofgasolineatthecarburetor.After starting, letthegenerat-
ingsetrunwithoutloada fewminutestowarmup,ifpossible
(reducesenginewear).
RemoteStarting(remoteswitchinhouse,garage,
etc.):
1. Depresstheremotestart-stopswitchtoSTART.
Holddownswitchuntilthegeneratingsetstarts.
Thenreleaseimmediately.SeeFigure15.
FIGURE15.TYPICALREMOTE
START-STOPSWITCH
Forunitswhichoperateongasoline,itisnecessarytoholdthe
startswitchdownforabout15secondsbeforecranking
occurs(duetoa timedelayforthecompartmentexhaustfan).
2. Applytheloadtothegeneratingsetusinginstruc-
tionsToApplyLoadbelow.
StartingatCompartment:
1. OpenthehousingusinginstructionsToOpenthe
Unitonpage10.
2. Depressthestart-stopswitchonthecontrol (Fig-
ure-letoSTART.Releaseassoonasthegenerat-
ingsetstarts.
3. Close the housing using instructions To Close
the Unit.
4. Transfertheloadtothegeneratingsetusing
instructionsToApplyLoadbelow.
FIGURE16.GENERATINGSETCONTROL
TO CLOSE THE UNIT
1. Standdirectlyinfrontofthehousing(Figure13).
Liftthehousingslightlysothehousingbacksides
onlyareincontactwiththeslides(trimmolding).
2. Pushthehousingstraightbacklettingthehous-
ingsidesrestintheslides.
3.Closethelockhaspandlockunit(iflockused).
TO APPLY LOAD
1. Ifpossible,letthegeneratingsetruna few min-
uteswithoutloadtoallowforenginewarm-up.
2. Table1 showstypicalappliancesandtheirap-
proximatewattagedemands.Donotoperatetoo
manylargeappliancesatonce(freezer,refrigera-
tor,electricwaterheater,clothesdryer, etc.).
Startingrequirementsareoftenfourtimesgreat-
erthanrunningrequirements.
CAUTION00notoperateairconditioningsystems
K^K^Uixy^^withthegeneratingset.Powerrequire-
mentsofthesesystemswilloverloadthegeneratingset.
3.Transfertheloadtothegeneratingsetwiththe
manualorautomatictransferswitchused.See
theappropriateinstructionsincludedwiththe
transferswitch.
4. Ifthegeneratingsetisoverloaded,youshould
noticea flickerinyourlights.Ifa largeoverload
developsnogeneratingsetoutputresults.Inthis
case:
a.Removesomeapplianceloads.
b.Switchthetransferswitchtotheutilitypower
source(thegeneratingsetwon'tstartunder
load).
ll

c.Restartthegeneratingset.
d. Switchthetransferswitchbacktothegenerat-
ingset(unitnowsuppliespowertotheload).
TABLE 1. TYPICAL APPLIANCE LOADS
APPLIANCEORTOOLAPPROXIMATERUNNING
WATTAGE
Refrigerator600-1000
Vacuumcleaner250-800
Coffeepercolator550-700
Electricfryingpan1000-1350
Hairdryer350-500
Dishwasher1000-1800
Electriciron500-1200
Radio50-200
Electricwaterheater1500-5000
Spaceheater1000-1500
Electricblanket50-200
Television200-600
Electricdrill250-750
BatterychargerUpto800
Electricwaterpump450-1000
Microwaveoven700-1500
'Toaster500-1200
Rangetop(perelement)800-1500
Rangeoven3000-4000
Freezer300-500
StoppingtheUnitatCompartment:
1. Openthecompartmenthousingusinginstruc-
tionsToOpentheUnitonpage10.
2. Depressandholdthestart-stopswitchonthe
controltoSTOP.Releaseafterthegeneratingset
stops.
3.Closethecompartmenthousingusinginstruc-
tionsToClosetheUnitonpage11.
LOW TEMPERATURE CONDITIONS
1. Usea lightweightoilasshowninthePERIODIC
MAINTENANCEsection.Changeoilonlywhen
theengineiswarm.
Failuretousea lighterweightoilincoldweatherresultsIn
hardcrankinganda chancetheunitwon'tstart.
2. GasolineOnly:Usefreshfuelandkeepthefuel
tank full. Afulltankpreventsmoisturecondensa-
tion.
3.Keepthefuelsystemclean.
4. Exercise the generating set frequently (see Exer-
cising).
TO REMOVE LOAD
Afternormalpowerreturns,transfertheloadfromthe
generatingsettothecommercialpowersourcewith
yourmanualorautomatictransferswitch.Seethe
instructionssuppliedwiththetransferswitch.To
stopthegeneratingset,seeToStoptheUnitbelow.
TO STOP THE UNIT
Beforestoppingtheunit,letitruna fewminutes
withoutloadto cool. Atyourearliestconvenience
afterstoppingtheunit,checktheengineoilleveland
gasolinesupply,ifused.
If your home standby unit has a remote start-stop
switch in the house, garage, etc., as shown in Figure
15, proceed to instructions given under Remote
Stopping.
If your home standby unit start-stop switch in the
compartment is like that shown in Figure 16, proceed
to instructions given under Stopping the Unit at
Compartment.
RemoteStopping(remoteswitchinhouse,garage,
etc.): Depressandholdtheremotestart-stopswitch
toSTOP.Releaseafterthegeneratingsetstops.
EXERCISING
Infrequentuseofunitscanresultinthefollowing:
Watercondensinginenginefuelandlubricationsys-
temcausingcontaminationand/orrust,lossofpro-
tectiveoilfilmonmovingengineparts,lossofengine
fuelprimeduetodrain-backand/orevaporation,bat-
terydischargeduetointernalandexternalcurrent
leakage,andbreakdownofgeneratorinsulationdue
towaterabsorption.
Properexercisingdoesthefollowing:Elevatesen-
gineoiltemperatureto180oF(82.2°C)evaporating
waterfromenginelubricationsystemandgenerator
windings,re-establishesa protectiveoilfilmonen-
gineparts,rechargesbatterytofullnormalpotential,
andbringsgeneratoruptonormaloperatingtemper-
aturethroughactualapplicationof load. Theengine
oiltemperatureshouldbeheldat180°F (82.2°C)for
atleast20minutesandtheunitshouldbeexercisedat
leastonceeachmonth.
Properexercisingcanusuallybeaccomplishedby
observingthefollowingprocedures:Performallspeci-
fiedmaintenancechecks,startingunitandapplying
loadbycreatinga simulatedpowerfai I ure. Thisexer-
cisesthecontrolandswitchgearsystems.Applying
notlessthan50percentloadtoheatupengineand
generatorasdescribedabove;exercisingunitlong
enoughtoprovideatleast20minutesrunningtimeat
normaloperatingtemperatures.Thiswillrequireat
least60minutestotalrunningtime.Provideapproxi-
mately1 minuteofoperationatnoloadtoallowthe
enginetocooldown.
12

Improperexercisingmaycausemoredamagethan
noexercisingat all, becauseofthefollowing:Signifi-
cantamountsofwaterandrawfuelwillremaininthe
lubricationoiliftheunitisnotatthespecifiedoperat-
ingtemperature;operatingengineatnoloadorat
temperaturesbelowthosespecifiedcausescarbon
build-up,sparkplugandexhaustsystemfoulingand
inadequatechargingofbattery.Continuedoperation
inthismannermaycausestartingfailureand/or-
enginedamage.Exercisinga generatorsetwithout
exercisingassociatedcontrolsandswitchgeardoes
notensureoperatingintegrityofthecontrolsand
switchgear.Iftheassociatedequipmentisnotfully
functional, thesystemmayfailtoprovidepower
whenrequired.
Aftereachexerciseperiod,refillfueltankandcheck
engineforleaksandgeneralcondition.Locatecause
ofleaks(ifany)andcorrect.
HIGH TEMPERATURE CONDITIONS
1. Seethatnothingobstructsairflowtoandfromthe
unitcompartment.
2. Housingshouldbeproperlyinstalledandundam-
aged.
DUSTY ORDIRTYCONDITIONS
1. Keepgeneratingsetclean.Keepcoolingsurfaces
clean.
2. Serviceaircleanerasfrequentlyasnecessary
(seePERIODICMAINTENANCEsection).
3.Reduceoilchangeschedule(seePERIODIC
MAINTENANCEsection).
4. Keepgovernorlinkageclean(seePERIODIC
MAINTENANCEsection).
5.Cleangeneratorbrushes,slipringsandcommu-
tator.Donotremovenormal(darkbrown) film.
Donotpolish,(seePERIODICMAINTENANCE
section).
TO CHECK THEOIL
mark.SeePERIODIC
forrecommendedoil. MAINTENANCEsection
WARNING ^DoNOTcheckoilwhiletheengineisoperat-
ofoilfillduetocrankcasepressure.
1.
ing. Hotoilcouldcausebumsbyblowingout
instructions To
Opentheunithousingusing
OpentheUnitonpage10.
2. RemovetheoillevelindicatorshowninFigure17
byturningcounterclockwiseandliftingstraight
out.
3.Wipetheendoftheindicatorwitha cleanragor
papertowel.
4. Installindicatorbackinenginebyturningclock-
wise.
5.Removetheindicatorandobserveifengineoil
levelreachedfullmark("F").Ifnot,addoil
throughoilbaseopeninguntilitreachesfull
6.Reinstalloillevelindicator.
Afterthefirst50hoursofoperationofa neworreconditioned
generatingset,changethecrankcaseoil.Afterwards,changeoil
every100hoursofoperation.
B285
FIGURE17.ENGINEOILLEVELINDICATOR
RECOMMENDED FUEL
Useclean, fresh,unleadedorregulargradegasoline.
Donotusehighlyleadedpremiumfuels.Using
unleadedgasolineresultsinreducedvalveandcar-
boncleanoutmaintenance.
Iftheuseofunleadedgasolineisdesired,useregular
gasolineforthefirst25hourstoallowtheringstoseat
wellforbestperformance.Thenuseunleadedgaso-
linethereafter.
Ifregulargasolineisusedcontinuously,carbonand
leaddepositsmustberemovedfromthecylinder
headsasrequiredtopreventenginepowerloss.
Unleadedgasolinemaybeusedsafelyonlyafterlead
depositshavebeenremoved.
r^^^J^^^ Ifleaddepositsarenotremovedfromengine
L^^^x^^xsJL beforeswitchingfromleadedtononleaded
gasoline,pre-ignitioncouldoccurcausingseveredamagetothe
engine.
WARNINGI Neverfillthetankwhentheengineisrunning
^^^m—m^m^Jandleavesomefuelexpansionspacetopre-
ventpossibilityofexplosion.
Filling the Gasoline Tank
WARNING Becauseoffirehazard,neverfillthegasoline
tankwhilethegeneratingsetisrunning.
Becauseofgasolinefumes;sparks,flames,etc.,shouldnotbe
usednearthefuelsystemwithoutgreatcaution.
1. Unlockandopenthecompartment.SeeToOpen
theUnitonpage10.
2. Units with tank outside compartment:
a.Ontheinside,rearcompartmentpanel,liftand
slidethebarrelboltlocksothegasolinetank
13

TANKHOOD HOLDHOODUPWITH
LOCK,SCREW,ETC.
BARRELBOLTLOCKINSIDE
COMPARTMENT(SLIDETO
RIGHTTORELEASETANK
HOOD
GASOLINETANK
FIGURE18.ACCESSTOGASOLINETANKOUTSIDECOMPARTMENT
shieldonthecompartmentrearpanelisre-
leased. SeeFigure18.
b.Liftthehinged,gasolinetankshieldtoexpose
thegasolinetank.
3.Disconnectthefuellineconnectorfromthegaso-
linetankcap.Pullupthedisconnectsleeveto
release theconnectorasshowninFigure18a.
FEMALECONNECTORFOR
FUELLINE(NOTESLEEVE
ISPULLEDBACK)
MALECONNECTOR
FORFUELLINE
TANKCAP
OPENVENTON
MODELSWITHTANK
OUTSIDECOMPARTMENT
FIGURE18a.CONNECTORASSEMBLYAT
FUELTANKCAPFORFUELLINE
4. Removethegasolinetankfromset.
WARNING\ Don0'transportfueltankwithvented
^HHM^HMJ. cap.Use only sealed cap supplied with
tank.Personalinjurymayotherwiseresult.
5.Removegasolinetankcapbyturningcounter-
clockwise.
6.Fillfueltanksothatfuellevelisapproximately1
inch(25.4m)belowthefueltankopening(this
allowsforexpansion).
7.Replacethetankcapbyturningclockwise.
8.Putthefullfueltankbackinthecompartmentor
inthetankholder,whicheverapplies.Securethe
tankwiththetankhold-downstrap(applicableif
tankislocatedinsidecompartment).
9.Reconnectthefuelline.Pulltheconnectorsleeve
backonthefemaleconnectorwhichisattached
toline.Insertconnectorontomaleconnector(on
tankcap)andreleasesleeve.
10. Lowerthetankshieldoverthegasolinetankand
locktheshielddownwiththebarrelboltlockon
theinside,rearcompartmentpanel(Figure18).
11. ClosethecompartmentusinginstructionsTo
ClosetheUnitonpage11.
GAS-GASOLINE CONVERSION
Thecombinationgas-gasolinecarburetorcanbe
switchedtogasolineoperationbythefollowing
procedure:
1. Closethemanualfuelshutoffvalveinsupplyline
fornaturalgasorpropane-butanevapor,wher-
everlocated.
2. Openthegasolinefuelshutoffvalve,wherever
located.
3.SetthesparkpluggapasgivenintheSPECIFI-
CATIONSsection.
4. Seethatthechokeisfreeandworkseasily(app-
liestoelectricchokeonly).
5.Starttheunit.Ifitrunsunevenlyunderloaddueto
faultycarburetoradjustment,themainjetneeds
adjusting. Thisisnotthesamemainadjusting
screwusedforgaseous fuel. Anotheradjusting
screwisprovidedforthispurpose(referto
ADJUSTMENTSsection).
Tochangebacktonaturalorpropane-butaneoperation,
reversetheaboveprocedureandresetthesparkpluggap.
14

PERIODIC MAINTENANCE
Regularlyscheduledmaintenanceisthekeytoloweroperatingcostsandlongerservicelifefortheunit.Usethe
followingscheduleasa guide.However,actualoperatingconditionsunderwhicha unitisrunshouldbethe
determiningfactorinestablishinga maintenanceschedule.Whenoperatinginverydustyordirtyconditions,
reducesomeoftheserviceperiods.Checktheconditionofthecrankcaseoil,thefilters,etc.frequentlyuntilyou
canestablishtheproperservicetimeperiods.
Foranyabnormalitiesinoperation,unusualnoisesfromengineoraccessories,lossofpower,overheating,etc.,
contactyournearestdealer.
PERIODIC MAINTENANCE SCHEDULE
AFTER EACH CYCLE OFINDICATED HOURS
SERVICE THESE ITEMS 8 50_j 100 200 400
GeneralInspection' SeePage 9 xl
CheckOilLevel 13 X
CheckBatteryElectrolyteLevel 8 X
ChangeCrankcaseOil 16 x2
CheckSparkPlugs 18 x4
CheckBreakerPoints 22 x3
CleanBreatherValve 16 X
CleanGovernorLinkage 18 X
ReplaceAirCleanerElement 16 x2
ReplaceBreakerPoints 22 x4
CleanCrankcaseBreather 16 x
AdjustTappets x3
CheckGeneratorBrushes(ReplaceifNecessary) As Required
x'- Alwayscheckfuelsupply,oillevelandgiveunitageneralinspectionafterpoweroutageevenifunitrunsfewer
hoursthanshownabove.
x2- Makesureairinletsandoutletsareunobstructed.Checkforfuelleaks,propermounting,exhaustleaks,etc.
x3- Fordetailedmaintenance,contactyournearest,authorizedWardsservicecenter.
x"- Changeoilevery100hoursofoperationor3 months,whicheveroccursfirst.Reducescheduleifoperatingin
dustyordirtyconditions.
WARNINGfcDoN0Tcheck^ wh'letheengineis operating.Hotoilcould cause burnsby
Iblowingoutofoildueto crankcase pressure.
15

CRANKCASE OIL
OilcapacityofthegeneratingsetisfourU.S.quarts
(3.78litres).Fillthecrankcaseuntiltheoilreachesthe
full("F")markontheoillevelindicator(Figure19).
FIGURE19.ENGINEOILLEVELINDICATOR
UseanoilwiththeAPI(AmericanPetroleum
Institute)designationSEorSE/CC.Oilshouldbe
labeledashavingpassedMSSequenceTest(also
knownasASTMG-IVSequenceTest).Refertooil
chartbelowforrecommendedviscosityaccordingto
temperature.
Useashlessorlow-ashoilforgaseousfueloperation.
operatinghoursor3 months,whicheveroccursfirst.
Ifoperatinginextremelydustyordirtyconditions,
theoilmighthavetobechangedsooner.When
addingoilbetweenchanges,usethesamebrandasin
thecrankcase.Variousbrandsofoilmightnotbe
compatiblewhenmixedtogether.
Oilconsumptionmaybehigherwitha multi-gradeoil
thanwitha single-gradeoilifbothoilshavecompar-
ableviscositiesat210°F (99°C).Therefore,single-
gradeoilsaregenerallymoredesirableunlessantici-
patinga widerangeoftemperatures.Usetheproper
gradeoilfortheexpectedconditions.
Theoildrainislocatedontherightsideoftheengine.
DoNOTcheckoilwhiletheengineisoper-
ating. Hotoilcouldcauseburnsbyblowing
WARNING
outofoilfillduetocrankcasepressure.
AIRCLEANER
Propermaintenanceoftheaircleanerisextremely
important.Negligenceofregularroutinemainten-
ancewillresultinreducedenginelife.
Removetheoilcuponthebottomoftheairbreather
(Figure20),emptytheexistingoil,andthoroughly
cleanthecupandscreenina petroleum-base sol-
vent.Drythecupandscreen,fillcupwithoil(same
weightoilasincrankcase)tooillevelmark.
WARNING Useextremecarewhencleaningwith
a petroleum-
basecleanserduetofirehazard.
KEEPCONNECTIONS
AIRTIGHT
OIL
LEVEL!
CUP
RETAINERSCREW
FIGURE20.AIRCLEANERASSEMBLY
"Notrecommendedforgaseousfueloperation.
Checkoillevelaftereachoperation(or 8 hoursopera-
tion, whicheveroccursfirst)andchangeoilevery100
CRANKCASEBREATHER
Liftofftherubberbreathercapandcarefullypryvalve
fromcap(Figure21).Ifvalvedoesn'tcomeouteasily,
presshardwithbothyourthumbsontopofthecap
16

andfingersbelowtoreleasethevalvefromthecap.
Washandrinsethewholevalveina petroleum-base
solvent.Drythevalveandre-install.Besuretheper-
forateddiscistowardtheengine..
WARNING Useextremecarewhencleaningwitha petro-
leum-basecleanserduetotirehazard.
Electric Fuel Pump
Every100operatinghoursorsooner,drainthefuel
pumpandcheckthefilter(Figure23).Togainaccess
tothefilter,turnthebasehexnutcounterclockwise
(facingbottomofpump).Iftheelementappearsdirty,
replacewitha newone.Besuretoreplacethegaskets
duringreassembly.
RUBBERBREATHER
TUBECAP
VALVE
VALVE
FLAPPER-
FIGURE21.CRANKCASEBREATHER
FUEL SYSTEM
WARNING
J| Becauseoffirehazard,neverexposefuelsys-
temtosparks,flame,etc.
Fuel Filters
Every100operatinghoursorsooner,cleanthefuel
filterelements.Removethegastankcapandfuel
pickupassembly.Inspecttheballcheckandvalve
(Figure22)andcleanwithcompressedair.
FUEL
CONNECTOR
OPENVENTON
MODELSWITHTANK
OUTSIDECOMPARTMENT
\\ FUELPICKUF
\'\ LINE
BALLCHECK
ANDFILTER
FIGURE22.FUELCAPANDPICKUPASSEMBLY
—ELECTRIC
FUELPUMP
GASKET
B69
FIGURE23.ELECTRICFUELPUMP
VACUUM SPEED BOOSTER
Usea finewiretocleanthesmallholeintheshort
vacuumtubewhichfitsintotheholeinthetopofthe
engineintakemanifold(Figure24).Donotenlarge
thishole.
Ifthereistensionontheexternalspringofthe
vacuumspeedboosterwhenthegeneratingsetis
operatingatnoloadorlight load, itmaybedueto
improperadjustment,a restrictedholeinthesmall
vacuumtube,ora leakintheboosterdiaphragmor
gasket.
CLEANHOLE
FIGURE24.VACUUMSPEEDBOOSTER
17

FIGURE25.CLEANINGGOVERNORLINKAGEJOINT
GOVERNOR LINKAGE
Thelinkagemustbeabletomovefreelythroughits
entiretravel.Every50hoursofoperation,cleanthe
jointsandlubricateasshowninFigure25.Also
inspectthelinkageforbinding,excessiveslackand
wear.
SPARK PLUGS
Eachtimethesparkplugsareremoved,inspect,
cleanandregap(Figure26).Ifthepluglooksdisco-
loredorhasfouled,replaceit.
SPARKPLUGGAP
0.025(0.635mm)GASOLINE
0.018" (0.457)mm)GASEOUS
familiarwiththeoperationofelectricgenerating
equipment.
Brush Replacement
Installnewbrusheswhentheoldonesareworntothe
dimensionsshowninFigure27.Removetheendbell
A873
MEASURE FROM TOPFACEOF
BRUSH BLOCK TOTOPOF BRUSH
FIGURE 26. CHECKING SPARK PLUG GAP
GENERATOR MAINTENANCE
Thegeneratornormallyneedslittlecareotherthana
periodiccheckofthebrushes,commutatorand col-
lectorrings.Ifa majorrepairjobonthegenerator
shouldbecomenecessary,havetheequipmentcheck-
edbya competentelectricianwhoisthoroughly
COMMUTATOR
BRUSHES COLLECTORRING
BRUSHES
NEW 5/8"(15.8mm)
11/16" (17.5mm)
1/2WEAR
13/16" (20.6mm) 7/8"(22.2mm)
REPLACE
1" (25.4mm)
1-1/16" (26.9mm)
FIGURE27.MEASURINGBRUSHWEAR
18