{"product_id":"ametek-lamb-117939-vacuum-motor-for-md-central-vacuum-199r","title":"AMETEK Lamb 117939 Vacuum Motor for MD Central Vacuum – Part# 199R","description":"\u003ch2\u003eQuick Summary\u003c\/h2\u003e\n\u003cp\u003eThis replacement vacuum motor is the AMETEK Lamb 117939 used in select MD central vacuum power units. It is a new motor, not rebuilt, and is listed for MD M850 and M850H 120V models.\u003c\/p\u003e\n\u003cp\u003eAvailable from \u003cstrong\u003eAce Vacuums\u003c\/strong\u003e, with help matching parts to your MD central vacuum system at our Fairfax and Leesburg, VA showrooms.\u003c\/p\u003e\n\u003ch3\u003eQuick Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAMETEK Lamb 117939 motor\u003c\/li\u003e\n\u003cli\u003eNew motor, not rebuilt\u003c\/li\u003e\n\u003cli\u003e3-stage motor design\u003c\/li\u003e\n\u003cli\u003e110-120 volt, 50-60 hertz\u003c\/li\u003e\n\u003cli\u003eListed for MD M850 and M850H (120V)\u003c\/li\u003e\n\u003cli\u003ePart number 199R\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe 117939 Vacuum Motor is a replacement motor for select MD central vacuum power units. This AMETEK Lamb motor is listed for MD M850 (120V) and MD M850H (120V) models and may also be marked 7939 or 11-7939.\u003c\/p\u003e\n\u003cp\u003eSpecifications provided for this motor include a 3-stage design, 5.7 inch bottom diameter, 8 inch height, 3-1\/2 inch bolt height, 138.6 inch waterlift, 101.2 CFM, 458 air watts, and 13.6 amps. It only replaces the 117939 motor.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect replacement:\u003c\/strong\u003e This motor only replaces the AMETEK Lamb 117939 motor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits select MD models:\u003c\/strong\u003e It is listed for MD M850 (120V) and MD M850H (120V) power units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew motor:\u003c\/strong\u003e This is a brand new motor, not a rebuilt unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance specs provided:\u003c\/strong\u003e The listed specifications include 138.6 inch waterlift, 101.2 CFM, and 458 air watts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon identification numbers:\u003c\/strong\u003e The motor may also be labeled 7939 or 11-7939.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrushes can be replaced:\u003c\/strong\u003e The 117939 motor uses carbon motor brushes that can be replaced.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eMD Compatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is listed as the match for these MD central vacuum power units:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMD M850 (120V)\u003c\/li\u003e\n\u003cli\u003eMD M850H (120V)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCheck the model number on your power unit label before ordering. Our team can confirm the match if you are unsure.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAMETEK Lamb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor number\u003c\/td\u003e\n\u003ctd\u003e117939\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003e199R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFan stages\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBottom diameter\u003c\/td\u003e\n\u003ctd\u003e5.7 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e110-120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHertz\u003c\/td\u003e\n\u003ctd\u003e50-60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBolt height\u003c\/td\u003e\n\u003ctd\u003e3-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaterlift\u003c\/td\u003e\n\u003ctd\u003e138.6 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCFM\u003c\/td\u003e\n\u003ctd\u003e101.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir watts\u003c\/td\u003e\n\u003ctd\u003e458\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmps\u003c\/td\u003e\n\u003ctd\u003e13.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits MD models\u003c\/td\u003e\n\u003ctd\u003eMD M850 (120V), MD M850H (120V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility note\u003c\/td\u003e\n\u003ctd\u003eIncludes AirMaster, Modern Day and SilentMaster\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuthorized Dealer\u003c\/td\u003e\n\u003ctd\u003eAce Vacuums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eBest For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eReplacing a worn 117939 motor in an MD central vacuum\u003c\/li\u003e\n\u003cli\u003eMD M850 (120V) and M850H (120V) units\u003c\/li\u003e\n\u003cli\u003eMatching a motor labeled 117939, 7939, or 11-7939\u003c\/li\u003e\n\u003cli\u003eRestoring a unit with motor-related shutdown or sparking symptoms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNot Ideal For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNot for replacing other motor numbers\u003c\/li\u003e\n\u003cli\u003eNot for MD models outside the listed fit without confirming compatibility\u003c\/li\u003e\n\u003cli\u003eMini breaker or relay issues may need separate diagnosis or parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Buy from Ace Vacuums\u003c\/h2\u003e\n\u003cp\u003eWhen you purchase from \u003cstrong\u003eAce Vacuums\u003c\/strong\u003e, you receive:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCentral vacuum parts matched to your MD system\u003c\/li\u003e\n\u003cli\u003eHelp choosing the right hose, tools and inlet parts\u003c\/li\u003e\n\u003cli\u003eKnowledgeable support before and after the sale\u003c\/li\u003e\n\u003cli\u003eShipping or pickup at our Fairfax and Leesburg showrooms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eAvailable Online \u0026amp; In-Store\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAMETEK Lamb 117939 Vacuum Motor for MD Central Vacuum\u003c\/strong\u003e is available online and in-store through \u003cstrong\u003eAce Vacuums\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eVisit Our Showrooms\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFairfax, VA:\u003c\/strong\u003e 11110 Main St, Fairfax, VA 22030\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeesburg, VA:\u003c\/strong\u003e 300 Fort Evans Rd NE, Leesburg, VA 20176\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCall 703-997-9292 (ext. 1 Fairfax, ext. 2 Leesburg).\u003c\/p\u003e\n\u003chr\u003e\n\u003ch5\u003eFAQs\u003c\/h5\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails class=\"ace-faq\" style=\"border-bottom: 1px solid #dddddd; padding: 14px 0;\" name=\"ace-faq-accordion\"\u003e\u003csummary style=\"cursor: pointer; font-weight: 600; font-size: 16px; line-height: 1.5; display: list-item;\"\u003eWhich MD central vacuum models does this motor fit?\u003c\/summary\u003e\u003cdiv style=\"padding: 12px 0 0;\"\u003e\u003cp\u003eThis motor is listed for MD M850 (120V) and MD M850H (120V).\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-faq\" style=\"border-bottom: 1px solid #dddddd; padding: 14px 0;\" name=\"ace-faq-accordion\"\u003e\u003csummary style=\"cursor: pointer; font-weight: 600; font-size: 16px; line-height: 1.5; display: list-item;\"\u003eIs this a rebuilt motor?\u003c\/summary\u003e\u003cdiv style=\"padding: 12px 0 0;\"\u003e\u003cp\u003eNo. It is a brand new motor, not rebuilt.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-faq\" style=\"border-bottom: 1px solid #dddddd; padding: 14px 0;\" name=\"ace-faq-accordion\"\u003e\u003csummary style=\"cursor: pointer; font-weight: 600; font-size: 16px; line-height: 1.5; display: list-item;\"\u003eWhat motor does this replace?\u003c\/summary\u003e\u003cdiv style=\"padding: 12px 0 0;\"\u003e\u003cp\u003eIt only replaces the 117939 motor.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-faq\" style=\"border-bottom: 1px solid #dddddd; padding: 14px 0;\" name=\"ace-faq-accordion\"\u003e\u003csummary style=\"cursor: pointer; font-weight: 600; font-size: 16px; line-height: 1.5; display: list-item;\"\u003eCan this motor have other numbers on it?\u003c\/summary\u003e\u003cdiv style=\"padding: 12px 0 0;\"\u003e\u003cp\u003eYes. It may say 7939 or 11-7939.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-faq\" style=\"border-bottom: 1px solid #dddddd; padding: 14px 0;\" name=\"ace-faq-accordion\"\u003e\u003csummary style=\"cursor: pointer; font-weight: 600; font-size: 16px; line-height: 1.5; display: list-item;\"\u003eWhat are the basic electrical specs?\u003c\/summary\u003e\u003cdiv style=\"padding: 12px 0 0;\"\u003e\u003cp\u003eThe listed specs are 110-120 volts, 50-60 hertz, and 13.6 amps.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-faq\" style=\"border-bottom: 1px solid #dddddd; padding: 14px 0;\" name=\"ace-faq-accordion\"\u003e\u003csummary style=\"cursor: pointer; font-weight: 600; font-size: 16px; line-height: 1.5; display: list-item;\"\u003eWhat are signs that the motor may need replacement?\u003c\/summary\u003e\u003cdiv style=\"padding: 12px 0 0;\"\u003e\u003cp\u003eThe record lists signs such as a mini breaker popping, electrical smell, excessive blue sparks from the motor top, a click with no startup, shutting down on its own and working later, or reaching its expected life.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-faq\" style=\"border-bottom: 1px solid #dddddd; padding: 14px 0;\" name=\"ace-faq-accordion\"\u003e\u003csummary style=\"cursor: pointer; font-weight: 600; font-size: 16px; line-height: 1.5; display: list-item;\"\u003eCan the brushes be replaced on this motor?\u003c\/summary\u003e\u003cdiv style=\"padding: 12px 0 0;\"\u003e\u003cp\u003eYes. The 117939 motor has carbon motor brushes that can be replaced.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"ace-faq\" style=\"border-bottom: 1px solid #dddddd; padding: 14px 0;\" name=\"ace-faq-accordion\"\u003e\u003csummary style=\"cursor: pointer; font-weight: 600; font-size: 16px; line-height: 1.5; display: list-item;\"\u003eHow do I confirm MD central vacuum compatibility?\u003c\/summary\u003e\u003cdiv style=\"padding: 12px 0 0;\"\u003e\u003cp\u003eIf you have an MD M850 (120V) or MD M850H (120V), this is the listed motor. If your model is different, confirm the exact power unit model and motor number before ordering.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e","brand":"AMETEK Lamb","offers":[{"title":"Default Title","offer_id":53406068244661,"sku":"199R","price":207.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0575\/6751\/0709\/files\/199R_100.jpg?v=1790801063","url":"https:\/\/acevacuums.com\/products\/ametek-lamb-117939-vacuum-motor-for-md-central-vacuum-199r","provider":"Ace Vacuums","version":"1.0","type":"link"}