{"product_id":"5301081-genuine-cummins®-air-compressor-for-cummins-isb-qsb-6-7l","title":"5301081 | Genuine Cummins® Air Compressor For Cummins ISB\/QSB 6.7L","description":"\u003cp\u003e\u003cstrong\u003eDescription:\u003cbr\u003e\u003c\/strong\u003eAn Air Compressor\u003cstrong\u003e 5301081 \u003c\/strong\u003eis the engine-driven pump that supplies compressed air for a truck or bus air brake system. Air Compressor For Cummins ISB\/QSB 6.7L\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e: 5301081\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003cspan\u003e: New\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003eManufacture\/Brand\u003c\/strong\u003e\u003cspan\u003e: Cummins\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cstrong\u003eFits 5301081 \u003c\/strong\u003eFor Freightliner, Kenworth, Peterbilt, International, and other heavy-duty trucks equipped with the appropriate Cummins 6.7L engine\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\" style=\"width: 45.6835%;\"\u003eEngine\u003c\/th\u003e\n\u003cth class=\"last:pe-10\" style=\"width: 54.1367%;\"\u003eYears commonly listed\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 45.6835%;\"\u003e\u003cstrong\u003eCummins ISB 6.7L\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 54.1367%;\"\u003e2008–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 45.6835%;\"\u003e\u003cstrong\u003eCummins QSB 6.7L\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 54.1367%;\"\u003e2008–2024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul id=\"catalogModels\" class=\"nav catalog\"\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePurpose of using 5301081:\u003c\/strong\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cstrong\u003e1. Operates the air brakes (primary purpose)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSupplies compressed air to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eService brakes\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eParking brakes\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEmergency brakes\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eKeeps air tanks charged so brakes apply and release correctly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy it matters:\u003c\/strong\u003e\u003cbr\u003eWithout air pressure, the brakes \u003cstrong\u003ecannot function\u003c\/strong\u003e—and the system is designed to apply brakes automatically for safety.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Maintains safe operating air pressure\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eContinuously replaces air lost during braking\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWorks with the \u003cstrong\u003egovernor\u003c\/strong\u003e to regulate pressure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eKeeps pressure in the safe range (usually \u003cstrong\u003e120–135 PSI\u003c\/strong\u003e)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy it matters:\u003c\/strong\u003e\u003cbr\u003eConsistent pressure = predictable braking performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3. Powers other air-operated systems\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBeyond brakes, compressed air is used for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAir suspension\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eClutch assist\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAir horns\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission controls\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoors and accessories\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy it matters:\u003c\/strong\u003e\u003cbr\u003eOne compressor supports multiple critical vehicle systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Ensures fail-safe braking\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eAir brake systems are \u003cstrong\u003efail-safe\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIf pressure drops too low, \u003cstrong\u003espring brakes apply automatically\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy it matters:\u003c\/strong\u003e\u003cbr\u003ePrevents runaway vehicles and loss of control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e5. Supports vehicle safety and compliance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRequired by law for heavy vehicles with air brakes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMust meet DOT air-pressure build-up standards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy it matters:\u003c\/strong\u003e\u003cbr\u003eA properly functioning compressor keeps the vehicle \u003cstrong\u003elegal and safe to operate\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns of a Bad Air Compressor 5301081:\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e1. Slow air pressure build-up\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTakes much longer than normal to reach operating PSI\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFails DOT air build-up test\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Worn piston rings, leaking valves, internal wear\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e2. Won’t reach full pressure\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ePressure stalls below ~120 PSI\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGovernor never cuts out\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Internal leakage or failing compressor head\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e3. Air pressure drops quickly\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003ePressure falls fast after braking\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLow-air warning comes on often\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Compressor can’t keep up with demand\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e4. Excessive oil in air lines or air dryer\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOily residue in tanks or dryer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOil blowing out of air dryer purge\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Worn compressor rings or seals (very common)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e5. Unusual noises\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eKnocking, rattling, grinding\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLoud ticking that wasn’t there before\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Mechanical wear or internal damage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e6. Overheating\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCompressor runs extremely hot\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBurnt smell near compressor\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Restricted air flow, lubrication issues, overworking unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e7. Air dryer purging too often\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDryer purges constantly or irregularly\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Compressor struggling to maintain pressure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e8. Engine performance issues\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLoss of power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncreased engine load\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Compressor seizing or dragging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e9. Coolant or oil leaks (water-cooled compressors)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOil in coolant or coolant in oil\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExternal leaks at compressor\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Failed seals or cracked head\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e10. Brake warning lights \/ alarms\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLow-air buzzer sounds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBrake warning light stays on\u003cbr\u003e\u003cstrong\u003eCause:\u003c\/strong\u003e Insufficient air pressure from compressor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eAbout the Manufacturer – \u003c\/span\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eCummins:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCummins is a leading American manufacturer of diesel and natural gas engines, as well as power generation systems and emissions solutions. Founded in 1919 and headquartered in Columbus, Indiana, Cummins is known globally for its durable, high-performance engines used in trucks, buses, construction equipment, agriculture, and power systems.\u003c\/p\u003e\n\u003cp\u003eThe brand is widely respected for its innovation in clean diesel technology, including aftertreatment systems, turbochargers, and advanced electronics that help reduce emissions while maximizing engine efficiency and reliability.\u003c\/p\u003e","brand":"Cummins","offers":[{"title":"Default Title","offer_id":51015288357111,"sku":"5301081","price":1629.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/7080\/3959\/files\/s-l400_1.png?v=1786392123","url":"https:\/\/forcetruckparts.com\/products\/5301081-genuine-cummins%c2%ae-air-compressor-for-cummins-isb-qsb-6-7l","provider":"Force Truck Parts","version":"1.0","type":"link"}