Operator's Manual

ManualsBrandsToro ManualsMixersToro 68004C

Concretehasthefollowing4basicingredients:

•Sand

•Gravel

•Portlandcement

•Water

Dependingontheapplication,differentratiosofthese4

ingredientscanbeused.

Therearemanyvariationsofconcretemixrecipes,depending

ontheapplication.Itisimportanttousetheappropriate

quantityofwater.Usingtoolittlewaterwillresultindryareas

inthemix,butusingtoomuchwaterwillresultinweaker

concrete.Theamountofwaterneededwillvarydepending

onmoisturecontentofthesandandgravel.Themixshould

haveathicknesssimilartopeanutbutter.

Keepthepouredconcretedampforseveraldaystoobtain

propercuring.Evaporationresultsinweakerconcrete.

Concretecuresthroughhydration,areactionbetweenwater

andcement.

MixingPre-mixConcrete

1.Ensurethatthetiltbrakeisfullyengagedandthatthe

drumisoperatingatfullspeed.

2.Pourwaterintothedrum.

3.Addtherequiredamountofdrypre-mix.

4.Allowthedrumtoturnwhilethemixreachesthe

appropriateconsistency.

MixingSand,Gravel,andCement

Thetypicalratioformixingconcreteis1partPortland

cement,2partssand,and3partsgravel.

1.Ensurethatthetiltbrakeisfullyengagedandthatthe

drumisoperatingatfullspeed.

2.Pourwaterintothedrum.

3.Addtherequiredamountofgravel.

4.AddtherequiredamountofPortlandcement.

5.Addtherequiredamountofsand.

6.Allowthedrumtoturnwhilethemixreachesthe

appropriateconsistency.

Note:Addingwaterandgravelbeforecementandsand

allowsthemixleftinthedrumfromthepreviousbatchtobe

tumbledoffofthedrumandpaddlesandintothenextbatch.

UsingtheDrum

DANGER

Contactwiththemixingpaddlescouldcause

damageorinjury.

Neverputyourhandsinsidethedrumwhilethe

engineisrunning.

DumpingtheDrum

Note:Whendumpingabatchofmaterial,leavetheengine

runningsothattherotatingdrumhelpsdumpthematerial.

1.Alignawheelbarroworsimilarcontainerofadequate

capacityinthepathofthedrumopening.

2.Whilethedrumisturning,rmlygraspthehandwheel

withonehand.

3.Usingyourotherhand,pullupwardsonthedrum-tilt

brakehandletoreleasethebrake.

4.Use2handstoslowlyturnthehandwheel,allowing

thedrumtotiltinthedesireddirectionanddumpthe

desiredamountofmaterial.

5.Turnthehandwheelintheoppositedirectiontoreturn

thedrumintoanuprightposition.

6.Pushdownonthedrum-tiltbraketolockthedrum

intoposition,avoidingaccidentaldischargingof

concretemix.

7.Afterdumpingabatchofmaterial,cleanthedrum;

referto

CleaningtheDrum(page26).

Note:Thisstepwillcleanthepaddlesanddrum

betweenbatchesandpreventdriedmaterialfrom

formingandcontaminatingthenextbatchofmaterial.

CleaningtheDrum

ServiceInterval:Aftereachuse

Important:Donotstrikeonthedrumwithashovel,

hammer,oranyotherdevicetoloosenanyaccumulated

driedmaterials.

1.Whilethemachineisrunning,usethehandwheelto

tiltthedrumslightly.

2.Engagethedrum-tiltbraketopreventthedrumfrom

tiltingfurtheranddischargingthewater.

3.Asthedrumisrotating,sprayitthoroughlywithwater

beforethematerialdries.

4.Allowthedrumtorotateandtumbletheloosematerial

andwater,furtherlooseningtherestofthematerial.

5.Continuetospraythedrumwithwatertoremoveallof

thematerialfromthedrumandmixingpaddles.

6.Whenallofthematerialhasbeenremovedfromthe

surfacesofthedrumandmixingpaddles,disengagethe

drum-tiltbrakeandusethehandwheeltotiltthedrum

anddumpthewaterfromthedrum.

7.Ifsomematerialstillremainsinthedrum,spraythe

drumwithwaterwhileitistilteddownward,allowing

thewaterandmaterialtorunout.

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