HomeTrucksTrucks & AccessoriesHeavy Trucks: Class 7 & 8Spec Sheet: International WorkStar Heavy Duty TruckNavistar's two-page specs on the WorkStar HD sloped-hood vocation truckFebruary 7, 2013International WorkStar Vocational Tractor International Workstar Truck DownloadRelatedInternational WorkStar Vocational TractorInternational Workstar TruckNavistar International CorporationRecommendedFleet MaintenanceBuilding a Mechanic Truck That Works for YouThe ideal truck will maximize on-location maintenance and repair.Fleet MaintenanceCaterpillar Launches Program to Develop Hydrogen-Hybrid Power SolutionThe project will demonstrate how control systems and electric-hybrid components can help hydrogen-fueled engines meet or exceed the power density and transient performance of traditional diesel engines.Fleet Maintenance4 Steps to Forecasting Equipment Fleet Additions During an Unstable MarketContractors want to understand opportunities to improve equipment efficiency through software and hardware additions to increase their fleet’s productivity.