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SmartROC T45-10 4 Operation

Checkpoint Inspection Instructions

Returnoilfilter Operator'sdisplayincabin Checkforanysignsofleaks.If

thepressureinthereturnoilfilter

exceedsthesetvalue,asymbol

willbeshownontheoperator's

display.

Displayforengineanddirec

tionalinstruments

Visualcheck Checkthatnoneofthefaultindi

catorsymbolsison.Ifafaultis

indicatedinthestatusbar,stop

theunitandrectifythefault.

Hydraulicsystem Visualcheck Monitorallpressuregaugesin

theDrillingmenu.

Suctionhood Occurrenceofcrushedrock Raisethesuctionhoodnowand

thentocheckthatcrushedrock

isflushedupproperlyfromthe

hole.

4.5.7InCaseofBreakdownorIncident

CheckingHighCouplingSleeveTemperature

NOTE:Couplingsleevetemperaturemustnotexceed120ºC(248ºF).

Dependingonthelayersoftherock,temperaturecanvaryevenwithinasmallarea.High

couplingsleevetemperatureisusuallyduetoapoorratiobetweendrillfeedpressure,per

cussionpressureandrotationpressure.

Excessivecouplingsleevetemperatureisindicatedby:

n Measuringwithathermometer.

n Oildrippingfromtherockdrillvaporizingonthecouplingsleeve.

n Thecouplingsleevechangingcolor.

ReducingCouplingSleeveTemperature

Checktheconditionofthedrillbit.Anoverdrilledbitgenerateslesstorqueinthecou

plingsleeve.

Grindthedrillbit.

Changetoadrillbitwithballisticbuttons.

Reducerotationspeedasmuchaspossiblewithoutcausingthedrillstringtorotate

jerkilyIftherockistoohardforballisticbits.

Checkthedampeningpressureandsetittotherecommendedlevel.Reducepercus

sionpressuretobelowthebasicsetting(510bar).Areasonablereductioninpene

trationratemustbeaccepted.

Checkand/oradjustfeedpressuresothattheshankadapterisin“floatposition”.

Atlas Copco SmartROC T45--10 User Manual

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