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techtalk:ih:oil03i [2025/09/05 21:52] – [Shaft Seal] hippysmacktechtalk:ih:oil03i [2025/09/06 02:57] (current) – [General advice] hippysmack
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 Be sure to push the seal all the way in or it will add resistance to turn on the gears. ((Jaime1840 https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/202622-74-ironhead-oil-pump-breather-valve-gear-drag-video)) \\  Be sure to push the seal all the way in or it will add resistance to turn on the gears. ((Jaime1840 https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/202622-74-ironhead-oil-pump-breather-valve-gear-drag-video)) \\ 
 Here are the official instructions for installing the seal in the pump. Click on pic to enlarge. \\ Here are the official instructions for installing the seal in the pump. Click on pic to enlarge. \\
-{{:techtalk:ih:oil:1958-1976_oil_pump_seal_instructions.jpg?direct&400|}} \\+{{:techtalk:ih:oil:1958-1976_oil_pump_seal_instructions.jpg?direct&500|}} \\
  
 Note: \\ Note: \\
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 Tightening / adjusting the mounting nuts / bolts: \\ Tightening / adjusting the mounting nuts / bolts: \\
 +Do not over tighten the oil pump bolts as that may bind up the pump and ruin it. The gaskets make up part of the oil pump clearances. ((ryder rick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/65154-oil-pump-seals)) 
   * You can modify the stud mounted pumps to use bolts instead. ((mrmom9r of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/191180-installing-72-oil-pump-on-69xlch#post4124056))   * You can modify the stud mounted pumps to use bolts instead. ((mrmom9r of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/191180-installing-72-oil-pump-on-69xlch#post4124056))
     - Drill the mounting holes in the pump body 1/64" oversize.     - Drill the mounting holes in the pump body 1/64" oversize.