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  <xs:element id="alg_RentalEquipmentNet" abstract="false" name="RentalEquipmentNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alg_VegetationManagementSegmentMember" abstract="true" name="VegetationManagementSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_IndustrialEquipmentSegmentMember" abstract="true" name="IndustrialEquipmentSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alg_AverageCommonSharesAbstract" abstract="true" name="AverageCommonSharesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="alg_IncreaseDecreaseInRentalEquipment" abstract="false" name="IncreaseDecreaseInRentalEquipment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alg_InternationalOperationsAndGeographicInformationTextBlock" abstract="false" name="InternationalOperationsAndGeographicInformationTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="alg_RevenueFromContractWithCustomerShippingAndHandlingCostsPolicyTextBlock" abstract="false" name="RevenueFromContractWithCustomerShippingAndHandlingCostsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="alg_ScheduleOfValuationAndQualifyingAccountsTableTextBlock" abstract="false" name="ScheduleOfValuationAndQualifyingAccountsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="alg_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="alg_SupplementalCashFlowInformationRelatedToLeasesTableTextBlock" abstract="false" name="SupplementalCashFlowInformationRelatedToLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="alg_AccountingPoliciesTable" abstract="true" name="AccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="alg_AccountingPoliciesLineItems" abstract="true" name="AccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="alg_RoyalTruckMember" abstract="true" name="RoyalTruckMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alg_SECSchedule1209SalesDiscountsMember" abstract="true" name="SECSchedule1209SalesDiscountsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WholegoodUnitsMember" abstract="true" name="WholegoodUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_PartsMember" abstract="true" name="PartsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_InventoryUsagePeriod" abstract="false" name="InventoryUsagePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_InventoryReservePercentage" abstract="false" name="InventoryReservePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="alg_ProductWarrantyPeriod" abstract="false" name="ProductWarrantyPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_ProductWarrantyAccrualPeriodOfExpensesUsedInCalculation" abstract="false" name="ProductWarrantyAccrualPeriodOfExpensesUsedInCalculation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_ProductWarrantyAccrualPeriodForSalesUsedInCalculation" abstract="false" name="ProductWarrantyAccrualPeriodForSalesUsedInCalculation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_ProductWarrantyAccrualLagPeriod" abstract="false" name="ProductWarrantyAccrualLagPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_ScheduleofAcquiredIndefinitelivedandFiniteIntangibleAssetsbyMajorClassTable" abstract="true" name="ScheduleofAcquiredIndefinitelivedandFiniteIntangibleAssetsbyMajorClassTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="alg_ScheduleofAcquiredIndefinitelivedandFiniteIntangibleAssetsbyMajorClassLineItems" abstract="true" name="ScheduleofAcquiredIndefinitelivedandFiniteIntangibleAssetsbyMajorClassLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="alg_GradallMember" abstract="true" name="GradallMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_BushHogMember" abstract="true" name="BushHogMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_CashFlowLesseeAbstract" abstract="true" name="CashFlowLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="alg_ThirdAmendedAndRestatedRevolvingCreditAgreementMember" abstract="true" name="ThirdAmendedAndRestatedRevolvingCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alg_TermFacilityMember" abstract="true" name="TermFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_DebtInstrumentNumberOfCovenants" abstract="false" name="DebtInstrumentNumberOfCovenants" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alg_LongTermDebtMaturityAfterYearThree" abstract="false" name="LongTermDebtMaturityAfterYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alg_EffectiveIncomeTaxRateReconciliationExecutiveCompensationLimitationAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationExecutiveCompensationLimitationAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alg_EffectiveIncomeTaxRateReconciliationTaxCreditExpenseForeignTaxCreditExpense" abstract="false" name="EffectiveIncomeTaxRateReconciliationTaxCreditExpenseForeignTaxCreditExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alg_EffectiveIncomeTaxRateReconciliationPreviouslyUnrecognizedTaxBenefitAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationPreviouslyUnrecognizedTaxBenefitAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alg_DeferredTaxAssetsLeaseLiability" abstract="false" name="DeferredTaxAssetsLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alg_DeferredTaxLiabilitiesLeaseAsset" abstract="false" name="DeferredTaxLiabilitiesLeaseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alg_TaxCutsAndJobsActIncompleteAccountingProvisionalUndistributedAccumulatedEarningsOfForeignSubsidiary" abstract="false" name="TaxCutsAndJobsActIncompleteAccountingProvisionalUndistributedAccumulatedEarningsOfForeignSubsidiary" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="alg_IncentiveStockOption2015PlanMember" abstract="true" name="IncentiveStockOption2015PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_TwoZeroZeroNineEquityIncentivePlanMember" abstract="true" name="TwoZeroZeroNineEquityIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_QualifiedStockOptionsMember" abstract="true" name="QualifiedStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_NonQualifiedOptionsMember" abstract="true" name="NonQualifiedOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_SharebasedCompensationAwardTrancheFourMember" abstract="true" name="SharebasedCompensationAwardTrancheFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_SharebasedCompensationAwardTrancheFiveMember" abstract="true" name="SharebasedCompensationAwardTrancheFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_AwardDateTwoMember" abstract="true" name="AwardDateTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_QualifiedStockOptionsExercisePriceRangeOneMember" abstract="true" name="QualifiedStockOptionsExercisePriceRangeOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_QualifiedStockOptionsExercisePriceRangeTwoMember" abstract="true" name="QualifiedStockOptionsExercisePriceRangeTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_QualifiedStockOptionsExercisePriceRangeThreeMember" abstract="true" name="QualifiedStockOptionsExercisePriceRangeThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_GradallCompanyEmployeesRetirementPlanMember" abstract="true" name="GradallCompanyEmployeesRetirementPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_InternationalAssociationOfMachinistAndAerospaceRetirementPlanMember" abstract="true" name="InternationalAssociationOfMachinistAndAerospaceRetirementPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_DefinedBenefitPlanNumberOfDefinedBenefitPensionPlans" abstract="false" name="DefinedBenefitPlanNumberOfDefinedBenefitPensionPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alg_FormerEmployeesCoveredByPensionPlan" abstract="false" name="FormerEmployeesCoveredByPensionPlan" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alg_CurrentEmployeesCoveredByPensionPlan" abstract="false" name="CurrentEmployeesCoveredByPensionPlan" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alg_DeferredCompensationArrangementRequisiteServicePeriod" abstract="false" name="DeferredCompensationArrangementRequisiteServicePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_PercentageOfFinalThreeYearsAverageSalaryRetirementBenefitAssumption" abstract="false" name="PercentageOfFinalThreeYearsAverageSalaryRetirementBenefitAssumption" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="alg_DeferredCompensationArrangementwithIndividualTermOfFinalAverageSalaryUsedToDetermineRetirementBenefit" abstract="false" name="DeferredCompensationArrangementwithIndividualTermOfFinalAverageSalaryUsedToDetermineRetirementBenefit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_DeferredCompensationArrangementWithIndividualRetirementAge" abstract="false" name="DeferredCompensationArrangementWithIndividualRetirementAge" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_DeferredCompensationArrangementWithIndividualDurationLimitVestedRetirementBenefitWillBePaidAfterDeathOrChangeInControl" abstract="false" name="DeferredCompensationArrangementWithIndividualDurationLimitVestedRetirementBenefitWillBePaidAfterDeathOrChangeInControl" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_DeferredCompensationArrangementMaximumContractualTerm" abstract="false" name="DeferredCompensationArrangementMaximumContractualTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="alg_DefinedBenefitPlanRetirementBenefitPercentage" abstract="false" name="DefinedBenefitPlanRetirementBenefitPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="alg_DefinedContributionPlanNumberOfPlans" abstract="false" name="DefinedContributionPlanNumberOfPlans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alg_DefinedContributionPlanNumberOfSubsidiaries" abstract="false" name="DefinedContributionPlanNumberOfSubsidiaries" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="alg_MidCapMutualFundsMember" abstract="true" name="MidCapMutualFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_LargeCapMutualFundsMember" abstract="true" name="LargeCapMutualFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_InternationalMutualFundsMember" abstract="true" name="InternationalMutualFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_LiabilityDrivenSolutionCITIMember" abstract="true" name="LiabilityDrivenSolutionCITIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_LiabilityDrivenSolutionCITIIMember" abstract="true" name="LiabilityDrivenSolutionCITIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WellsFargoInternationalEquityIndexFundMember" abstract="true" name="WellsFargoInternationalEquityIndexFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WellsFargoCausewayMember" abstract="true" name="WellsFargoCausewayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WellsFargoLargeCapGrowthIndexFundMember" abstract="true" name="WellsFargoLargeCapGrowthIndexFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WellsFargoLargeCapValueIndexFundMember" abstract="true" name="WellsFargoLargeCapValueIndexFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WellsFargoMultiManagerSmallCapMember" abstract="true" name="WellsFargoMultiManagerSmallCapMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WellsFargoRussellTwoZeroZeroZeroIndexFundMember" abstract="true" name="WellsFargoRussellTwoZeroZeroZeroIndexFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WellsFargoStandardAndPoorsMidCapIndexFundMember" abstract="true" name="WellsFargoStandardAndPoorsMidCapIndexFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WellsFargoMFSValueCITFMember" abstract="true" name="WellsFargoMFSValueCITFMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_WellsFargoTRowePriceILargeCapGrowthManagedCITMember" abstract="true" name="WellsFargoTRowePriceILargeCapGrowthManagedCITMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_TRowePriceEquityIncomeMember" abstract="true" name="TRowePriceEquityIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_CashAndShortTermInvestmentsMember" abstract="true" name="CashAndShortTermInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="alg_OtherRevenueMember" abstract="true" name="OtherRevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="alg_OtherGeographicalAreasMember" abstract="true" name="OtherGeographicalAreasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
