{"product_id":"harley-davidson-knucklehead-flathead-el-fl-u-ul-service-manual-pdf-1940-1947","title":"Harley-Davidson Knucklehead \u0026 Flathead EL FL U UL Service Manual PDF | 1940-1947","description":"\u003cdiv style=\"line-height: 1.45;\"\u003e\n\u003cdiv style=\"background: linear-gradient(rgb(47, 95, 166) 0%, rgb(30, 67, 120) 100%); padding: 16px; border-radius: 6px 6px 0px 0px;\"\u003e\n\u003cdiv style=\"color: rgb(255, 255, 255); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; font-size: 24px; font-weight: 800; letter-spacing: 1px;\"\u003eHARLEY-DAVIDSON \u003cspan style=\"color: #ffd24d;\"\u003e1940-1947\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 6px;\"\u003e\u003cspan style=\"color: #e7f0ff; font-family: Segoe UI, Arial, Helvetica, sans-serif;\"\u003e\u003cspan style=\"font-size: 13px; letter-spacing: 0.8px; text-transform: uppercase;\"\u003e\u003cb\u003eKnucklehead \u0026amp; Flathead Service Manual (1940-1947)\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(34, 34, 34); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(255, 255, 255); padding: 14px; border-width: 0px 1px 1px; border-image: initial; border-color: initial rgb(215, 215, 215) rgb(215, 215, 215) rgb(215, 215, 215); border-style: initial solid solid solid;\"\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 13.5px;\"\u003e\n\u003cp\u003eHarley-Davidson factory service manual for the 1940 to 1947 big twins: the 61 and 74 cu in OHV Knucklehead and the 74 and 80 cu in side-valve Flathead models. This 165-page manual is bookmarked by section and covers lubrication, engine overhaul, electrical, carburetor, transmission and clutch, wheels, frame and sidecar. Delivered instantly as a high-quality scan of the manual, compatible with any PC, Mac, tablet, or mobile device.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdobe Acrobat (PDF) format\u003c\/li\u003e\n\u003cli\u003eHigh-quality scan of the factory manual, bookmarked by section\u003c\/li\u003e\n\u003cli\u003eEasily print any or all content\u003c\/li\u003e\n\u003cli\u003eEverything needed to service \u0026amp; maintain your motorcycle\u003c\/li\u003e\n\u003cli\u003eTroubleshooting instructions, wiring diagrams, and reference material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(34, 34, 34); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(238, 244, 251); padding: 14px; border-width: 0px 1px 1px; border-image: initial; border-color: initial rgb(215, 215, 215) rgb(215, 215, 215) rgb(215, 215, 215); border-style: initial solid solid solid;\"\u003e\n\u003cdiv style=\"font-size: 13.5px; font-weight: 800; color: #1e4378; text-transform: uppercase;\"\u003eModels Covered\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 13.5px;\"\u003e\n\u003cul\u003e\n\u003cli\u003eEL 61 cu in (1000cc) OHV Knucklehead\u003c\/li\u003e\n\u003cli\u003eFL 74 cu in (1200cc) OHV Knucklehead\u003c\/li\u003e\n\u003cli\u003eU \/ US 74 cu in (1200cc) side-valve Flathead\u003c\/li\u003e\n\u003cli\u003eUL \/ ULH 74 and 80 cu in (1200cc \/ 1300cc) side-valve Flathead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(34, 34, 34); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(255, 255, 255); padding: 14px; border-width: 0px 1px 1px; border-image: initial; border-color: initial rgb(215, 215, 215) rgb(215, 215, 215) rgb(215, 215, 215); border-style: initial solid solid solid;\"\u003e\n\u003cdiv style=\"font-size: 13.5px; font-weight: 800; color: #1e4378; text-transform: uppercase;\"\u003eTable of Contents (165 Pages)\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 10px; font-size: 13.5px;\"\u003e\n\u003cul\u003e\n\u003cli\u003eTrouble Chart\u003c\/li\u003e\n\u003cli\u003eInitial Service of New Motorcycle\u003c\/li\u003e\n\u003cli\u003eEngine Lubrication\u003c\/li\u003e\n\u003cli\u003eOverhauling Engine\u003c\/li\u003e\n\u003cli\u003eElectrical\u003c\/li\u003e\n\u003cli\u003eCarburetor\u003c\/li\u003e\n\u003cli\u003eTransmission \u0026amp; Clutch\u003c\/li\u003e\n\u003cli\u003eWheels, Hubs \u0026amp; Tires\u003c\/li\u003e\n\u003cli\u003eFork, Frame \u0026amp; Handlebars\u003c\/li\u003e\n\u003cli\u003eSidecar\u003c\/li\u003e\n\u003cli\u003eDetailed Index\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(34, 34, 34); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(247, 247, 247); padding: 14px; border-width: 0px 1px 1px; border-image: initial; border-color: initial rgb(215, 215, 215) rgb(215, 215, 215) rgb(215, 215, 215); border-style: initial solid solid solid;\"\u003e\n\u003cdiv style=\"font-size: 13.5px; font-weight: 800; color: #1e4378; text-transform: uppercase;\"\u003eWhat's Included\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 13.5px;\"\u003e\n\u003cul\u003e\n\u003cli\u003eSpecifications, lubrication chart and service intervals\u003c\/li\u003e\n\u003cli\u003eTroubleshooting charts\u003c\/li\u003e\n\u003cli\u003eEngine disassembly, overhaul and adjustment\u003c\/li\u003e\n\u003cli\u003eCarburetor, ignition and generator service\u003c\/li\u003e\n\u003cli\u003eClutch, transmission and chain drive\u003c\/li\u003e\n\u003cli\u003eWheels, brakes, forks and frame\u003c\/li\u003e\n\u003cli\u003eWiring diagrams\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(34, 34, 34); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(255, 255, 255); padding: 14px; border-width: 0px 1px 1px; border-image: initial; border-color: initial rgb(215, 215, 215) rgb(215, 215, 215) rgb(215, 215, 215); border-style: initial solid solid solid;\"\u003e\n\u003cdiv style=\"font-size: 13.5px; font-weight: 800; color: #1e4378; text-transform: uppercase;\"\u003eFeatures\u003c\/div\u003e\n\u003cul\u003e\n\u003cli style=\"font-size: 13.5px;\"\u003ePrintable PDF, bookmarked by section\u003c\/li\u003e\n\u003cli style=\"font-size: 13.5px;\"\u003eHigh-resolution diagrams and schematics\u003c\/li\u003e\n\u003cli style=\"font-size: 13.5px;\"\u003eWorks on PC, Mac, tablet, and mobile devices\u003c\/li\u003e\n\u003cli style=\"font-size: 13.5px;\"\u003e\n\u003cb\u003eImportant:\u003c\/b\u003e This is a digital PDF manual. No paper book will be provided.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(34, 34, 34); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(238, 244, 251); padding: 14px; border-width: 0px 1px 1px; border-image: initial; border-color: initial rgb(215, 215, 215) rgb(215, 215, 215) rgb(215, 215, 215); border-style: initial solid solid solid;\"\u003e\n\u003cdiv style=\"font-size: 13.5px; font-weight: 800; color: #1e4378; text-transform: uppercase;\"\u003eDon't See What You Need?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 13.5px;\"\u003e\n\u003cul\u003e\n\u003cli\u003eWe maintain thousands of reference guides.\u003c\/li\u003e\n\u003cli\u003eMessage us. We can point you to the correct listing or post the one you're looking for.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(34, 34, 34); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(255, 255, 255); padding: 14px; border-width: 0px 1px 1px; border-image: initial; border-color: initial rgb(215, 215, 215) rgb(215, 215, 215) rgb(215, 215, 215); border-style: initial solid solid solid;\"\u003e\n\u003cdiv style=\"font-size: 13.5px; font-weight: 800; color: #1e4378; text-transform: uppercase;\"\u003eBuy With Confidence\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 13.5px;\"\u003e\n\u003cul\u003e\n\u003cli\u003eFast access to digital download\u003c\/li\u003e\n\u003cli\u003eReliable post-sale support\u003c\/li\u003e\n\u003cli\u003e60-day worry-free returns\u003c\/li\u003e\n\u003cli\u003eIf you have any questions about compatibility, model coverage, or what this manual includes, message us anytime.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(34, 34, 34); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(255, 255, 255); padding: 14px; border-width: 0px 1px 1px; border-image: initial; border-color: initial rgb(215, 215, 215) rgb(215, 215, 215) rgb(215, 215, 215); border-style: initial solid solid solid;\"\u003e\n\u003cdiv style=\"font-size: 13.5px; font-weight: 800; color: #1e4378; text-transform: uppercase;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 12px; font-size: 13.5px;\"\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Which Harley-Davidson Knucklehead 1940-1947 models does this manual cover?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: It covers the EL 61 cu in (1000cc) OHV Knucklehead, FL 74 cu in (1200cc) OHV Knucklehead, U \/ US 74 cu in (1200cc) side-valve Flathead and UL \/ ULH 74 and 80 cu in (1200cc \/ 1300cc) side-valve Flathead for model years 1940-1947.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: How long is the Harley-Davidson Knucklehead 1940-1947 manual and what sections does it contain?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: The PDF is 165 pages with 11 main sections: Trouble Chart; Initial Service of New Motorcycle; Engine Lubrication; Overhauling Engine; Electrical; Carburetor; Transmission \u0026amp; Clutch; Wheels, Hubs \u0026amp; Tires; Fork, Frame \u0026amp; Handlebars; Sidecar; Detailed Index.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: What repair and service procedures does the Harley-Davidson Knucklehead 1940-1947 manual cover?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: The listing covers: Specifications, lubrication chart and service intervals; Troubleshooting charts; Engine disassembly, overhaul and adjustment; Carburetor, ignition and generator service; Clutch, transmission and chain drive; Wheels, brakes, forks and frame; Wiring diagrams.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Does the Harley-Davidson Knucklehead 1940-1947 manual include wiring diagrams?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: Yes. The electrical section includes the wiring information for these models.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Does the Harley-Davidson Knucklehead 1940-1947 manual list torque specifications?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: Yes. Torque values are given in the specifications and throughout the procedures.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Can I use it to diagnose faults on the Harley-Davidson Knucklehead 1940-1947?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: Yes. It includes the factory 'locating troubles' charts for the engine, carburetor, electrical system and chassis.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Does it include maintenance schedules and service intervals?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: Yes. It includes the service intervals and maintenance procedures.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Does this manual cover other model years or related models?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: This listing covers model years 1940-1947 only. For related models, see: \u003ca href=\"\/products\/harley-davidson-servi-car-45-side-valve-wl-service-manual-pdf-1940-1958\"\u003eHarley-Davidson Servi-Car (1940-1958)\u003c\/a\u003e; \u003ca href=\"\/products\/harley-davidson-panhead-el-fl-flh-service-manual-pdf-1948-1957\"\u003eHarley-Davidson Panhead (1948-1957)\u003c\/a\u003e; \u003ca href=\"\/products\/harley-davidson-electra-glide-duo-glide-fl-flh-service-manual-pdf-1959-1969\"\u003eHarley-Davidson Electra Glide (1959-1969)\u003c\/a\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Will this manual help if my motorcycle won't crank or start?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: Yes. The Electrical section covers the starting and ignition systems, with test procedures and wiring diagrams to find why the engine won't turn over or fire.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Will it help if the clutch on my motorcycle slips or drags?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: Yes. The Transmission \u0026amp; Clutch section covers clutch plate and spring inspection with wear limits, plus clutch adjustment.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Will it help if my motorcycle runs rough or only runs on choke?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: Yes. The Carburetor section covers carburetor disassembly, cleaning, jetting and float adjustment, the usual work after a machine has sat.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: Is this the right manual for my Harley-Davidson Knucklehead 1940-1947?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: It is the right manual if your machine is one of the models listed under Models Covered and was built in 1940-1947. If you are not sure, message us with your model and year and we will point you to the correct listing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 12px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: rgb(34, 34, 34);\"\u003eQ: How do I receive this manual?\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 4px; color: rgb(60, 60, 60);\"\u003eA: You receive a download link by email immediately after purchase. No physical item is shipped. The PDF works on any PC, Mac, tablet, or phone with free Adobe Acrobat Reader.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(34, 34, 34); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(238, 244, 251); padding: 14px; border-width: 0px 1px 1px; border-image: initial; border-color: initial rgb(215, 215, 215) rgb(215, 215, 215) rgb(215, 215, 215); border-style: initial solid solid solid;\"\u003e\n\u003cdiv style=\"font-size: 13.5px; font-weight: 800; color: #1e4378; text-transform: uppercase;\"\u003eIndependent Supplier Notice\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 13.5px;\"\u003eDAL Manuals is an independent digital manual supplier. Brand names and model designations are used only to identify manual compatibility. DAL Manuals is not affiliated with, endorsed by, or sponsored by any manufacturer named on this page.\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: rgb(255, 255, 255); font-family: 'Segoe UI', Arial, Helvetica, sans-serif; background: rgb(42, 42, 42); padding: 12px 14px; border-radius: 0px 0px 6px 6px;\"\u003e\n\u003cdiv style=\"font-weight: 800; text-transform: uppercase;\"\u003eShipping \u0026amp; Returns\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 8px; font-size: 13.5px;\"\u003e\n\u003cp\u003e\u003cb\u003eShipping\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstant Digital Delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eReturns\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIf you're not fully satisfied, simply contact us for a no-hassle refund.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\ntable, th, td { border: none; }\n\u003c\/style\u003e","brand":"Harley-Davidson","offers":[{"title":"Default Title","offer_id":50849756643584,"sku":"HD_1940_1947_KNUCKLEHEAD","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/1785\/2672\/files\/dal-thumbnail-rollout-20261102-10269106110720.png?v=1793631934","url":"https:\/\/dalmanuals.com\/products\/harley-davidson-knucklehead-flathead-el-fl-u-ul-service-manual-pdf-1940-1947","provider":"DAL Manuals","version":"1.0","type":"link"}