{"product_id":"hd-value-hdv9781-air-spring-freightliner-cascadia","title":"HD Value HDV9781 Air Spring | Freightliner Cascadia – Aluminum Base","description":"\n\u003ch2\u003eHD Value HDV9781 Air Spring – Freightliner Cascadia, Aluminum Base\u003c\/h2\u003e\n\n\u003cp\u003eRestore your truck's air suspension performance with the \u003cstrong\u003eHD Value HDV9781 Air Spring with Aluminum Base\u003c\/strong\u003e, a heavy-duty replacement air bag designed for compatible Freightliner Cascadia, Columbia, Century, Coronado, Sterling, and Western Star air suspension applications.\u003c\/p\u003e\n\n\u003cp\u003eFeaturing a \u003cstrong\u003edurable rubber bellows and aluminum piston base\u003c\/strong\u003e, the HDV9781 helps support vehicle loads, maintain proper suspension ride height, and reduce road vibration during demanding commercial trucking operations.\u003c\/p\u003e\n\n\u003cp\u003eDesigned for compatible Freightliner AirLiner suspension configurations, this air spring is associated with \u003cstrong\u003eFreightliner 16-13840-000, Firestone W01-358-9781, Goodyear 1R12-603, and ContiTech AS9781\u003c\/strong\u003e replacement applications.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're replacing a leaking rear suspension air bag on a Freightliner Cascadia, repairing an air-ride suspension system, or maintaining a fleet of heavy-duty trucks, the \u003cstrong\u003eHD Value HDV9781\u003c\/strong\u003e provides a cost-effective aftermarket replacement option when its specifications match the original air spring.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number: HDV9781 | Aluminum Base | Compatible Freightliner AirLiner Applications\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHD Value HDV9781 Features \u0026amp; Benefits\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreightliner Cascadia Applications:\u003c\/strong\u003e Designed for compatible Cascadia rear air suspension configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminum Piston Base:\u003c\/strong\u003e Features an aluminum lower base for applications requiring this configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Rubber Bellows:\u003c\/strong\u003e Engineered to withstand repeated suspension movement and changing vehicle loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreightliner AirLiner Compatibility:\u003c\/strong\u003e Associated with selected Freightliner rear air-ride suspension systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRide Height Support:\u003c\/strong\u003e Helps maintain proper suspension ride height when installed in a functioning air suspension system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Isolation:\u003c\/strong\u003e Helps absorb road shock and reduce vibration transmitted through the truck chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOzone and Temperature Resistance:\u003c\/strong\u003e Specially formulated rubber compound helps resist environmental deterioration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion-Resistant Components:\u003c\/strong\u003e Electroplated components help protect against corrosion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAftermarket Replacement:\u003c\/strong\u003e Engineered around compatible OEM appearance, form, fit, and functionality requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommercial Truck Applications:\u003c\/strong\u003e Suitable for qualifying Freightliner, Sterling, and Western Star air suspension systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFreightliner Cascadia Air Spring Replacement\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHD Value HDV9781 air spring\u003c\/strong\u003e is a replacement option for certain Freightliner Cascadia trucks equipped with compatible aluminum-base rear air suspension assemblies.\u003c\/p\u003e\n\n\u003cp\u003eAir springs play an important role in maintaining vehicle ride height and isolating the chassis from road vibration. Proper suspension performance helps maintain vehicle stability, driving comfort, and suspension component operation.\u003c\/p\u003e\n\n\u003cp\u003eCommon symptoms of a worn air spring include air leaks, uneven suspension height, deteriorated rubber bellows, or a truck that loses ride height while parked.\u003c\/p\u003e\n\n\u003cp\u003eReplacing a damaged air spring with a correctly matched component helps restore the suspension system's intended performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Not all Freightliner Cascadia trucks use the same air spring. Confirm the original part number, VIN, suspension model, and aluminum-base configuration before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eAluminum Base Air Spring – Why It Matters\u003c\/h2\u003e\n\n\u003cp\u003eThe HDV9781 features an \u003cstrong\u003ealuminum piston base\u003c\/strong\u003e, which is a key characteristic when matching the replacement air spring to the original suspension assembly.\u003c\/p\u003e\n\n\u003cp\u003eAir springs may have aluminum, steel, or composite piston bases, and similar-looking products can have different mounting arrangements and suspension geometry.\u003c\/p\u003e\n\n\u003cp\u003eThe HDV9781 should be selected for applications requiring its specific aluminum-base configuration, dimensions, and mounting arrangement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo not assume aluminum-base and composite-base air springs are interchangeable.\u003c\/strong\u003e Always verify the original part number and suspension requirements.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Freightliner \u0026amp; Commercial Truck Applications\u003c\/h2\u003e\n\n\u003cp\u003eThe HD Value HDV9781 is associated with compatible Freightliner AirLiner and related heavy-duty truck air suspension configurations.\u003c\/p\u003e\n\n\u003cp\u003ePotential vehicle applications include:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eFreightliner Cascadia\u003c\/li\u003e\n\u003cli\u003eFreightliner Columbia\u003c\/li\u003e\n\u003cli\u003eFreightliner Century Class\u003c\/li\u003e\n\u003cli\u003eFreightliner Coronado\u003c\/li\u003e\n\u003cli\u003eFreightliner Classic\u003c\/li\u003e\n\u003cli\u003eOther compatible Freightliner highway tractors\u003c\/li\u003e\n\u003cli\u003eSelected Sterling commercial trucks\u003c\/li\u003e\n\u003cli\u003eSelected Western Star commercial trucks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment Note:\u003c\/strong\u003e These are potential vehicle applications, not guaranteed fitments for every model year or suspension package. Compatibility depends on the original air spring part number, installed suspension model, and mounting specifications.\u003c\/p\u003e\n\n\u003ch2\u003eFreightliner AirLiner Suspension Performance\u003c\/h2\u003e\n\n\u003cp\u003eFreightliner AirLiner suspension systems use air springs to help carry vehicle loads while providing suspension movement and ride comfort.\u003c\/p\u003e\n\n\u003cp\u003eWhen correctly installed in a compatible suspension system, the HDV9781 helps support:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eProper rear suspension ride height\u003c\/li\u003e\n\u003cli\u003eConsistent suspension movement\u003c\/li\u003e\n\u003cli\u003eReduced chassis vibration\u003c\/li\u003e\n\u003cli\u003eVehicle load support within approved suspension ratings\u003c\/li\u003e\n\u003cli\u003eImproved ride comfort over uneven road surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eComplete suspension performance also depends on properly functioning height control valves, air lines, shock absorbers, bushings, and mounting components.\u003c\/p\u003e\n\n\u003ch2\u003eHD Value HDV9781 Air Spring Cross References\u003c\/h2\u003e\n\n\u003cp\u003eThe following part numbers are associated with the HDV9781 air spring replacement family in commercial truck parts catalogs:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHD Value:\u003c\/strong\u003e HDV9781\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Reference:\u003c\/strong\u003e SP 559781-KA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreightliner:\u003c\/strong\u003e 16-13840-000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreightliner:\u003c\/strong\u003e 16-16773-000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreightliner:\u003c\/strong\u003e A16-14004-000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreightliner:\u003c\/strong\u003e 681-320-0017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirestone:\u003c\/strong\u003e W01-358-9781\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoodyear:\u003c\/strong\u003e 1R12-603\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoodyear:\u003c\/strong\u003e 1R12-1082\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContiTech:\u003c\/strong\u003e AS9781\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContiTech:\u003c\/strong\u003e 64266\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContiTech:\u003c\/strong\u003e 910S-16A382\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomann:\u003c\/strong\u003e AB1DF23-9781\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeritor:\u003c\/strong\u003e FS9781\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeritor:\u003c\/strong\u003e MAF9781\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Products:\u003c\/strong\u003e 889781\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorld American:\u003c\/strong\u003e WA01-9781C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlliance:\u003c\/strong\u003e ABP N32 019781\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCross-Reference Warning:\u003c\/strong\u003e These are catalog interchange references for part identification. Some products may have different piston materials, mounting details, or suspension requirements. Verify the original part number, mounting dimensions, and suspension configuration before treating any cross-reference as a direct replacement.\u003c\/p\u003e\n\n\u003ch2\u003eSigns of a Failing Freightliner Air Spring\u003c\/h2\u003e\n\n\u003cp\u003eOver time, air springs can deteriorate from repeated suspension movement, changing loads, environmental exposure, and road conditions.\u003c\/p\u003e\n\n\u003cp\u003eCommon warning signs include:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eTruck sitting low or leaning to one side\u003c\/li\u003e\n\u003cli\u003eAudible air leaks from the air spring or fittings\u003c\/li\u003e\n\u003cli\u003eCracks, cuts, or dry rot in the rubber bellows\u003c\/li\u003e\n\u003cli\u003eSuspension losing ride height while parked\u003c\/li\u003e\n\u003cli\u003eAir compressor cycling more frequently than normal\u003c\/li\u003e\n\u003cli\u003eHarsh ride quality or increased chassis vibration\u003c\/li\u003e\n\u003cli\u003eDamaged or corroded mounting components\u003c\/li\u003e\n\u003cli\u003eVisible damage to the aluminum piston base\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eOther air suspension components can cause similar symptoms. Inspect the complete system before determining the required repair.\u003c\/p\u003e\n\n\u003ch2\u003eHD Value HDV9781 Product Specifications\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e HD Value\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e HDV9781\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Reference:\u003c\/strong\u003e SP 559781-KA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Heavy-Duty Suspension Air Spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Rolling-Lobe Air Spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Base Material:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Diameter:\u003c\/strong\u003e 12.60 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvertised Overall Height Range:\u003c\/strong\u003e 8.24 to 23.16 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparately Listed Compressed Height:\u003c\/strong\u003e 7.80 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston Height:\u003c\/strong\u003e 6.48 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Plate Diameter:\u003c\/strong\u003e 9.00 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Connection:\u003c\/strong\u003e Top, Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Application:\u003c\/strong\u003e Compatible Freightliner AirLiner and Related Suspensions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirestone Reference:\u003c\/strong\u003e W01-358-9781\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoodyear Reference:\u003c\/strong\u003e 1R12-603\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 Air Spring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAir Spring Installation \u0026amp; Fitment Verification\u003c\/h2\u003e\n\n\u003cp\u003eBefore installing the HD Value HDV9781, verify the original air spring part number, suspension model, aluminum piston configuration, mounting plate dimensions, air inlet location, and required operating ride height.\u003c\/p\u003e\n\n\u003cp\u003eInspect air lines, fittings, height control valves, shock absorbers, brackets, and other suspension components for damage or wear.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCritical Safety Warning:\u003c\/strong\u003e Air suspension systems contain pressurized components and may move unexpectedly when pressure is released or restored. Properly support the vehicle and depressurize the suspension according to the manufacturer's procedures. Never work beneath a vehicle supported only by its air suspension.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProfessional Installation Recommended:\u003c\/strong\u003e Heavy-duty truck suspension components should be installed by qualified technicians following approved manufacturer service instructions.\u003c\/p\u003e\n","brand":"HD Value","offers":[{"title":"Default Title","offer_id":67718654722093,"sku":null,"price":154.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/4526\/0845\/files\/HDV-HDV9781_3.jpg?v=1792695654","url":"https:\/\/performancedieselgroup.com\/products\/hd-value-hdv9781-air-spring-freightliner-cascadia","provider":"Performance Diesel Group","version":"1.0","type":"link"}