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  <xs:element id="cat_SegmentReportingInformationDepreciationDepletionandAmortizationExpenseTableTextBlock" abstract="false" name="SegmentReportingInformationDepreciationDepletionandAmortizationExpenseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cat_ReconciliationofCapitalExpendituresTableTextBlock" abstract="false" name="ReconciliationofCapitalExpendituresTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cat_WriteOffsByOriginationYearTableTextBlock" abstract="false" name="WriteOffsByOriginationYearTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cat_OperationsAndSummaryOfSignificantAccountingPoliciesTable" abstract="true" name="OperationsAndSummaryOfSignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cat_FinanceReceivablesAxis" abstract="true" name="FinanceReceivablesAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cat_FinanceReceivablesDomain" abstract="true" name="FinanceReceivablesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_RecoveriesFromOverPaymentsMember" abstract="true" name="RecoveriesFromOverPaymentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_OperationsAndSummaryOfSignificantAccountingPoliciesLineItems" abstract="true" name="OperationsAndSummaryOfSignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cat_CumulativeTariffsPaid" abstract="false" name="CumulativeTariffsPaid" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_MaximumLengthofTimePolicyForeignCurrencyCashFlowHedge" abstract="false" name="MaximumLengthofTimePolicyForeignCurrencyCashFlowHedge" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cat_ManagingCommodityPriceRiskMaximumPeriod" abstract="false" name="ManagingCommodityPriceRiskMaximumPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cat_LongTermDebtDueWithinOneYearMember" abstract="true" name="LongTermDebtDueWithinOneYearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_LongTermDebtDueAfterOneYearMember" abstract="true" name="LongTermDebtDueAfterOneYearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_ConstructionIndustriesMember" abstract="true" name="ConstructionIndustriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_ResourceIndustriesMember" abstract="true" name="ResourceIndustriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_PowerEnergyMember" abstract="true" name="PowerEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_OtherUSGovernmentAndNonUSGovernmentDebtMember" abstract="true" name="OtherUSGovernmentAndNonUSGovernmentDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_ASRAgreementsMember" abstract="true" name="ASRAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_RepurchaseOfCommonStockASRAgreementsPercentageOfInitialCommonShares" abstract="false" name="RepurchaseOfCommonStockASRAgreementsPercentageOfInitialCommonShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="cat_StockRepurchaseProgramAcceleratedShareRepurchasesUnsettledForwardContractIndexToCommonStock" abstract="false" name="StockRepurchaseProgramAcceleratedShareRepurchasesUnsettledForwardContractIndexToCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_NonreportableSubsegmentsMember" abstract="true" name="NonreportableSubsegmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_NumberOfGroupPresidents" abstract="false" name="NumberOfGroupPresidents" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cat_NumberOfOperatingSegmentsLedByGroupPresidents" abstract="false" name="NumberOfOperatingSegmentsLedByGroupPresidents" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cat_NumberOfOperatingSegmentsLedByGroupPresidentResponsibleForCorporateServices" abstract="false" name="NumberOfOperatingSegmentsLedByGroupPresidentResponsibleForCorporateServices" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cat_NumberOfSmallerOperatingSegmentsLedByGroupPresident" abstract="false" name="NumberOfSmallerOperatingSegmentsLedByGroupPresident" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="cat_UsefulLifeToAmortizeGoodwillToSegmentAssets" abstract="false" name="UsefulLifeToAmortizeGoodwillToSegmentAssets" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cat_FinancialProductsSegmentMember" abstract="true" name="FinancialProductsSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_OperatingSegmentsExcludingIntersegmentEliminationMember" abstract="true" name="OperatingSegmentsExcludingIntersegmentEliminationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_EliminationsAndReconcilingItemsMember" abstract="true" name="EliminationsAndReconcilingItemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_PowergenerationMember" abstract="true" name="PowergenerationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_OilAndGasCustomerMember" abstract="true" name="OilAndGasCustomerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_IndustrialMember" abstract="true" name="IndustrialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_MiningHeavyConstructionAndQuarryAggregatesMember" abstract="true" name="MiningHeavyConstructionAndQuarryAggregatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_RailMember" abstract="true" name="RailMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_SellingGeneralAndAdministrativeResearchAndDevelopment" abstract="false" name="SellingGeneralAndAdministrativeResearchAndDevelopment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_GainLossOnCostCenters" abstract="false" name="GainLossOnCostCenters" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_CorporateCosts" abstract="false" name="CorporateCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_GainLossOnTiming" abstract="false" name="GainLossOnTiming" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_InventoryAndCostOfSales" abstract="false" name="InventoryAndCostOfSales" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_ShareBasedPaymentArrangementNoncashExpenseAdjusted" abstract="false" name="ShareBasedPaymentArrangementNoncashExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_FinancingCosts" abstract="false" name="FinancingCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_CurrencyGainLoss" abstract="false" name="CurrencyGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_OtherNonoperatingIncomeExpenseAdjusted" abstract="false" name="OtherNonoperatingIncomeExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_GainLossOtherMethodologyDifferences" abstract="false" name="GainLossOtherMethodologyDifferences" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_GoodwillAndIntangibleAssets" abstract="false" name="GoodwillAndIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_PropertyPlantAndEquipmentNetIncludingOtherAssets" abstract="false" name="PropertyPlantAndEquipmentNetIncludingOtherAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_InventoryMethodologyDifference" abstract="false" name="InventoryMethodologyDifference" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_LiabilitiesIncludedInSegmentsAssets" abstract="false" name="LiabilitiesIncludedInSegmentsAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_CostCentersDepreciationDepletionAndAmortization" abstract="false" name="CostCentersDepreciationDepletionAndAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_CostCentersCapitalExpenditures" abstract="false" name="CostCentersCapitalExpenditures" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_TimingCapitalExpenditures" abstract="false" name="TimingCapitalExpenditures" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_OtherCapitalExpenditures" abstract="false" name="OtherCapitalExpenditures" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_SegmentReportingInformationDepreciationDepletionAndAmortizationExpenseLineItems" abstract="true" name="SegmentReportingInformationDepreciationDepletionAndAmortizationExpenseLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cat_DepreciationDepletionAndAmortizationSegmentsAbstract" abstract="true" name="DepreciationDepletionAndAmortizationSegmentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cat_SegmentReportingInformationCapitalExpenditureLineItems" abstract="true" name="SegmentReportingInformationCapitalExpenditureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cat_SegmentReportingInformationCapitalExpenditureAbstract" abstract="true" name="SegmentReportingInformationCapitalExpenditureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cat_CapitalExpendituresSegmentsAbstract" abstract="true" name="CapitalExpendituresSegmentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cat_FinancingReceivableWeightedAverageTerm" abstract="false" name="FinancingReceivableWeightedAverageTerm" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cat_FinancingReceivableWeightedAverageRemainingTerm" abstract="false" name="FinancingReceivableWeightedAverageRemainingTerm" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cat_CustomerMember" abstract="true" name="CustomerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_DealerMember" abstract="true" name="DealerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_FinancingReceivableAllowanceForCreditLossesOtherActivity" abstract="false" name="FinancingReceivableAllowanceForCreditLossesOtherActivity" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_WriteOffsByOriginationYearTable" abstract="true" name="WriteOffsByOriginationYearTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cat_MiningMember" abstract="true" name="MiningMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_PowerMember" abstract="true" name="PowerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_WriteOffsByOriginationYearLineItems" abstract="true" name="WriteOffsByOriginationYearLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cat_CurrentMember" abstract="true" name="CurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_FinancingReceivables31to60DaysPastDueMember" abstract="true" name="FinancingReceivables31to60DaysPastDueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_FinancingReceivables61to90DaysPastDueMember" abstract="true" name="FinancingReceivables61to90DaysPastDueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_FinancingReceivablesEqualtoGreaterthan91DaysPastDueMember" abstract="true" name="FinancingReceivablesEqualtoGreaterthan91DaysPastDueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_PeriodAfterWhichCollectionOfFutureIncomeIsConsideredAsNotProbable" abstract="false" name="PeriodAfterWhichCollectionOfFutureIncomeIsConsideredAsNotProbable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cat_FinancingReceivable91dayspastdueandstillaccruing" abstract="false" name="FinancingReceivable91dayspastdueandstillaccruing" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_FinancingReceivableModifiedBorrowersNotExperiencingFinancialDifficultyMaximumPeriod" abstract="false" name="FinancingReceivableModifiedBorrowersNotExperiencingFinancialDifficultyMaximumPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cat_LargeCapitalizationMember" abstract="true" name="LargeCapitalizationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_SmallerCompanyMember" abstract="true" name="SmallerCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_REITMember" abstract="true" name="REITMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_LoansCarriedAtFairValue" abstract="false" name="LoansCarriedAtFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_FinanceReceivablesNet" abstract="false" name="FinanceReceivablesNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_WholesaleInventoryReceivables" abstract="false" name="WholesaleInventoryReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_FinanceleasesandfailedsaleleasebacksCarryingValue" abstract="false" name="FinanceleasesandfailedsaleleasebacksCarryingValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_NetperiodicpensionandOPEBincomecostexcludingservicecost" abstract="false" name="NetperiodicpensionandOPEBincomecostexcludingservicecost" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_MiscellaneousIncomeLossNonoperating" abstract="false" name="MiscellaneousIncomeLossNonoperating" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cat_RPMGlobalMember" abstract="true" name="RPMGlobalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cat_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedTangibleAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedTangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
