{"product_id":"01-04-221-detroit-diesel®-air-compressor-ba-921-for-60-series","title":"01.04.221 | Detroit Diesel® Air Compressor BA-921 For 60 Series","description":"\u003cp class=\"dURPtb\"\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e: Air Compressor BA-921 \u003cspan data-d-streaming-word=\"\"\u003eDetroit\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003eDiesel\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003eSeries\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003e60\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003e14.0L\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003eengine\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003eand\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003ecompressor\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003econfiguration\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: New\u003cbr\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e: For Detroit Diesel By Yumak\u003cbr\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e: 01.04.221\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSpecifications \u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eCylinder Diameter\u003c\/span\u003e Ø92 mm\u003cbr\u003e\u003cspan\u003eVolume\u003c\/span\u003e 360 cm³\u003cbr\u003e\u003cspan\u003ePiston Operating Distance\u003c\/span\u003e 54 mm\u003cbr\u003e\u003cspan\u003ePort 0\u003c\/span\u003e M27x2\u003cbr\u003e\u003cspan\u003ePort 2\u003c\/span\u003e M22x1.5\u003cbr\u003e\u003cspan\u003ePort 9.1\u003c\/span\u003e M18x1.5\u003cbr\u003e\u003cspan\u003ePort 9.2\u003c\/span\u003e M18x1.5\u003cbr\u003e\u003cspan\u003eCrankshaft Thread\u003c\/span\u003e M20x2.5 RH\u003cbr\u003e\u003cspan\u003eNumber of Cylinders\u003c\/span\u003e 1\u003cbr\u003e\u003cspan\u003eCooling\u003c\/span\u003e Water\u003cbr\u003e\u003cspan\u003eESS Feature\u003c\/span\u003e Yes\u003cbr\u003e\u003cspan\u003eWater Cooled Valve Plate\u003c\/span\u003e Yes\u003cbr\u003e\u003cspan\u003eDirect Working\u003c\/span\u003e Yes\u003cbr\u003e\u003cspan\u003eMaximum Operating Pressure\u003c\/span\u003e 10.5 bar\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cstrong\u003eFits For \u003cspan data-d-streaming-word=\"\"\u003eDetroit\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003eDiesel\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003eSeries\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003e60\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003e14.0L\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003eengine\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003eand\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003ecompressor\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan data-d-streaming-word=\"\"\u003econfiguration.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp\u003eA\u003cstrong\u003e \u003c\/strong\u003esingle cylinder air brake compressor\u003cstrong\u003e \u003c\/strong\u003eis a mechanical pump used on vehicles with air brake systems -\u003cstrong\u003e \u003c\/strong\u003ecommonly heavy trucks, buses, trains, and some industrial equipment. Its job is to compress air and supply pressurized air to the brake system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cstrong\u003e1. Supply air pressure for safe braking\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe compressor keeps the air tanks filled so the brakes can work reliably.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2. Simpler construction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith only one cylinder and piston:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003efewer moving parts,\u003c\/li\u003e\n\u003cli\u003eeasier servicing,\u003c\/li\u003e\n\u003cli\u003elower manufacturing cost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e3. Good for moderate-duty applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWorks well for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003esmaller trucks,\u003c\/li\u003e\n\u003cli\u003ebuses,\u003c\/li\u003e\n\u003cli\u003efarm equipment,\u003c\/li\u003e\n\u003cli\u003eolder heavy vehicles,\u003c\/li\u003e\n\u003cli\u003eindustrial machines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e4. Lower maintenance costs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSingle-cylinder units are generally easier to troubleshoot and rebuild than larger multi-cylinder compressors.\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\u003eSigns of Faulty \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\u003cp\u003eOne of the most common signs.\u003c\/p\u003e\n\u003cp\u003eThe compressor takes too long to raise tank pressure to operating range (often around 100–125 PSI).\u003c\/p\u003e\n\u003cp\u003eYou may notice:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWarning buzzer\/light staying on\u003c\/li\u003e\n\u003cli\u003eLong wait before driving\u003c\/li\u003e\n\u003cli\u003ePressure gauges rising very slowly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e2. Low air pressure\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe system cannot maintain normal pressure.\u003c\/p\u003e\n\u003cp\u003ePossible effects:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWeak braking response\u003c\/li\u003e\n\u003cli\u003eAir brakes not releasing properly\u003c\/li\u003e\n\u003cli\u003eRepeated low-air alarms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e3. Compressor runs constantly\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe compressor never seems to “cut out.”\u003c\/p\u003e\n\u003cp\u003eNormally, the governor unloads the compressor at maximum pressure. A failing compressor may struggle to reach cut-out pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4. Excessive oil in air tanks\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWorn piston rings or seals can allow engine oil into the air system.\u003c\/p\u003e\n\u003cp\u003eSigns include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOily residue when draining tanks\u003c\/li\u003e\n\u003cli\u003eOil-contaminated air lines\u003c\/li\u003e\n\u003cli\u003eDamaged air brake components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e5. Excessive moisture buildup\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA weak compressor can overheat or fail to properly manage airflow, leading to excess condensation.\u003c\/p\u003e\n\u003cp\u003eYou might see:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWater in tanks\u003c\/li\u003e\n\u003cli\u003eFrozen airlines in cold weather\u003c\/li\u003e\n\u003cli\u003eCorrosion in the system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e6. Unusual noises\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBad internal components can create:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eKnocking\u003c\/li\u003e\n\u003cli\u003eGrinding\u003c\/li\u003e\n\u003cli\u003eSquealing\u003c\/li\u003e\n\u003cli\u003eClicking\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese may indicate worn bearings, valves, or piston damage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7. Air leaks around compressor\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLeaks may occur at:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHead gasket\u003c\/li\u003e\n\u003cli\u003eFittings\u003c\/li\u003e\n\u003cli\u003eDischarge line\u003c\/li\u003e\n\u003cli\u003eUnloader\/governor connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e8. Overheating\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe compressor may become excessively hot due to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePoor lubrication\u003c\/li\u003e\n\u003cli\u003eRestricted discharge line\u003c\/li\u003e\n\u003cli\u003eCarbon buildup\u003c\/li\u003e\n\u003cli\u003eInternal wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e9. Smoke from compressor area\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBlue or gray smoke can indicate oil burning or severe internal wear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e10. Frequent governor cycling\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIf pressure rapidly drops and rebuilds repeatedly, the compressor may be weak or unable to keep up with demand.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"dURPtb\"\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eManufacturer information\u003c\/strong\u003e\u003cbr\u003eA part of the Knorr-Bremse Group, \u003cstrong\u003eBendix®\u003c\/strong\u003e provides the automotive and truck parts industry with cutting-edge energy management solutions, active safety technologies, and air brake charging for tractors, buses, commercial vehicles, trailers, as well as medium- and heavy-duty trucks throughout North America. Headquartered in Elyria, Ohio, Bendix Commercial Vehicle Systems employs over 3,200 people who work hand in hand for the accomplishment of the brand's vision: \"to become the leading worldwide supplier of active vehicle safety systems within the commercial vehicle industry.\" This brand takes pride in being the first to introduce many notable parts and technologies to the North American commercial vehicle market. Among these many firsts are the groundbreaking air brake system technologies such as air dryers, air compressors, and ABS. At Bendix, exceeding industry standards is a strict requirement.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003eFirst Truck Parts offers a \u003cstrong\u003e365-days warranty\u003c\/strong\u003e for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv style=\"position: absolute; left: 156px; top: 1103.76px;\" id=\"gtx-trans\"\u003e\n\u003cdiv class=\"gtx-trans-icon\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Detroit Diesel®","offers":[{"title":"Default Title","offer_id":68199163592948,"sku":"01.04.221","price":765.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/5010119-_7_6cc3c9ae-c72b-4377-ba63-eb840ea8a301.png?v=1709477892","url":"https:\/\/firsttruckparts.com\/products\/01-04-221-detroit-diesel%c2%ae-air-compressor-ba-921-for-60-series","provider":"First Truck Parts","version":"1.0","type":"link"}