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techtalk:ih:engmech01d [2022/03/24 05:39] – [1954-1956 K Model Primary Cover] hippysmacktechtalk:ih:engmech01d [2023/12/20 02:08] (current) – hippysmack
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 The HD part number is (34951-52) and the casting number is (34950-52). \\ The HD part number is (34951-52) and the casting number is (34950-52). \\
 Gasket: (34955-52). \\ Gasket: (34955-52). \\
-Fasteners: (3) cover screws and no dowel pins. \\+Fasteners: (3) cover screws and no dowel pins. Case has pin bosses but they are not drilled out. \\
 The original cover finish is natural (as cast). \\ The original cover finish is natural (as cast). \\
 Cover has a divot in the lower bottom to clear the sidestand mount. \\ Cover has a divot in the lower bottom to clear the sidestand mount. \\
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 The HD part number is (34951-54) and the casting number is (34950-52A). \\   The HD part number is (34951-54) and the casting number is (34950-52A). \\  
 Gasket: (34955-52A). \\ Gasket: (34955-52A). \\
-Fasteners: (3) cover screws. \\+Fasteners: (3) cover screws, (4) 3/16" dia roll pins to locate the cover to the case. \\
 The oil level plug boss was moved in front of the lower cover divot, hole was tapped for a screw (3728) and a washer (6218W). \\ The oil level plug boss was moved in front of the lower cover divot, hole was tapped for a screw (3728) and a washer (6218W). \\
 Half moon divot added to lower rear near brake switch boss to clear brake lever return spring. \\ Half moon divot added to lower rear near brake switch boss to clear brake lever return spring. \\
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 It was replaced in 1967 when the electric start was added to the H model. \\ It was replaced in 1967 when the electric start was added to the H model. \\
 It is similar to the K-Model (also KH and KHK) primary which preceded it, with two notable differences. \\ It is similar to the K-Model (also KH and KHK) primary which preceded it, with two notable differences. \\
-The K-Model primary didn't have the scrips and the Sportster primary protrudes out further accommodating the compensating spring on the motor sprocket. ((Moon Wolf of the XLFORUM http://xlforum.net/forums/showthread.php?t=1062720)) \\+The K-Model primary didn't have the scrips and the Sportster primary protrudes out further accommodating the compensating spring on the motor sprocket. ((Moon Wolf of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts?t=1062720)) \\
 HD part number is (34951-57) and the casting number is (34950-57). \\ HD part number is (34951-57) and the casting number is (34950-57). \\
  
-{{:techtalk:ih:engmech:1957-1966_xl-xlh_primary_cover_34951-57_by_moon_wolf.jpg?direct&300|}} ((photo by Moon Wolf of the XLFORUM http://xlforum.net/forums/showthread.php?t=1062720)) \\ +{{:techtalk:ih:engmech:1957-1966_xl-xlh_primary_cover_34951-57_by_moon_wolf.jpg?direct&300|}} ((photo by Moon Wolf of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts?t=1062720)) \\ 
 + 
 +Click on a pic to enlarge: ((photos courtesy of Ebay seller, panknuckpartsandtreasures. [[https://www.ebay.com/sch/panknuckpartsandtreasures/m.html?_nkw=&_armrs=1&_ipg=&_from=|Link to Ebay Store]] )) \\ 
 + 
 +{{:techtalk:ih:engmech:1957-1966_xl-xlh_primary_cover_34951-57_by_panknuckpartsandtreasures_pic1.jpg?direct&300|}} {{:techtalk:ih:engmech:1957-1966_xl-xlh_primary_cover_34951-57_by_panknuckpartsandtreasures_pic2.jpg?direct&300|}} {{:techtalk:ih:engmech:1957-1966_xl-xlh_primary_cover_34951-57_by_panknuckpartsandtreasures_pic3.jpg?direct&300|}} \\ 
 + 
 +{{:techtalk:ih:engmech:1957-1966_xl-xlh_primary_cover_34951-57_by_panknuckpartsandtreasures_pic4.jpg?direct&300|}} {{:techtalk:ih:engmech:1957-1966_xl-xlh_primary_cover_34951-57_by_panknuckpartsandtreasures_pic5.jpg?direct&300|}} {{:techtalk:ih:engmech:1957-1966_xl-xlh_primary_cover_34951-57_by_panknuckpartsandtreasures_pic6.jpg?direct&300|}} \\ 
 + 
 +====== 1958-1969 XLCH Primary Covers ====== 
 +The XLCH primary "tin" cover has several versions. Below are the two used on production models from 1958-1969. ((Moon Wolf of the XLFORUM http://xlforum.net/forums/showthread.php?t=1062720)) \\ 
 +There are no casting numbers on these covers as they are stamped steel. \\ 
 +The 1958-1963 version is very similar to the 1964-1969 version. The only difference can be seen from the back. \\ 
 +Notice that the inside of the derby on the 1958-1963 version is smooth because of the two-piece construction. \\ 
 +The '58-'63 XLCH primary covers are sometimes referred to as "double derbies". \\ 
 +Click on a pic below to enlarge: \\ 
 +{{:techtalk:ih:engmech:1958-1969_xlch_primary_covers_by_moon_wolf.jpg?direct&300|}} ((photo by Moon Wolf of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts?t=1062720 labeled by Hippysmack)) 
 + 
 +=== 1958-1963 version === 
 +HD part number is (34949-58) and it's made of stamped steel. \\ 
 + 
 +{{:techtalk:ih:engmech:1958-1963_xlch_primary_cover_by_moon_wolf.jpg?direct&300|}} ((photo by Moon Wolf of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts?t=1062720 labeled by Hippysmack)) 
 + 
 +=== 1964-1969 version === 
 +HD part number is (34949-64) and it's made of stamped and chromed steel. \\ 
 + 
 +Click on a pic below to enlarge: ((photos courtesy of Ebay seller, animalhouse2010, [[https://www.ebay.com/str/animalhouse2010?_trksid=p2047675.l2563|Link to Ebay store:]] )) \\ 
 +{{:techtalk:ih:engmech:1964-1969_xlch_primary_cover_pic1_by_animalhouse2010.jpg?direct&300|}} {{:techtalk:ih:engmech:1964-1969_xlch_primary_cover_pic2_by_animalhouse2010.jpg?direct&300|}} {{:techtalk:ih:engmech:1964-1969_xlch_primary_cover_pic3_by_animalhouse2010.jpg?direct&300|}} \\
  
 ====== 1967-1970 XLH Primary Cover ====== ====== 1967-1970 XLH Primary Cover ======
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 The hump-back on the rear of the cover mates up to the hump on the left case where the starter is mounted. \\ The hump-back on the rear of the cover mates up to the hump on the left case where the starter is mounted. \\
 The boss near the hump holds a Torrington B1210 bearing (9063) for the starter shaft. \\ The boss near the hump holds a Torrington B1210 bearing (9063) for the starter shaft. \\
-The tiny hole below front mounting bolt on the hump (as installed) is for a locating pin to the case. \\ +The tiny hole below front mounting bolt on the hump (as installed) is for a locating pin to the case for bearing alignment. \\ 
  
 Click on a pic to enlarge: ((photos courtesy of Eugene Rousse of River Side Cycle, [[http://www.riversidecycle.net|Link to site]] )) \\ Click on a pic to enlarge: ((photos courtesy of Eugene Rousse of River Side Cycle, [[http://www.riversidecycle.net|Link to site]] )) \\

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