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techtalk:ih:engmech09a [2021/06/10 21:14] hippysmack ↷ Links adapted because of a move operation |
techtalk:ih:engmech09a [2023/12/27 21:14] hippysmack |
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| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
| - | ====== IH: Engine Mechanicals - Sub-09I ====== | + | ====== IH: Engine Mechanicals - Sub-09A ====== |
| - | ===== Removing / Installing Motor Mounts ===== | + | ===== Sequence of Installing IH Motor Mounts ===== |
| ===== From the Service Manuals ===== | ===== From the Service Manuals ===== | ||
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| The ironhead factory service manuals lay out the procedure for 'stripping the motorcycle for repair'. \\ | The ironhead factory service manuals lay out the procedure for 'stripping the motorcycle for repair'. \\ | ||
| This covers the procedure for removing / installing the motor and also includes the motor mounts. | This covers the procedure for removing / installing the motor and also includes the motor mounts. | ||
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| - Install the right crash bar bolt (if equipped). | - Install the right crash bar bolt (if equipped). | ||
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| - Install the two bottom rear engine mounting bolts | - Install the two bottom rear engine mounting bolts | ||
| - Install the two top rear engine mounting bolts and regulator ground strap. | - Install the two top rear engine mounting bolts and regulator ground strap. | ||
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| - Install the two top rear engine mounting bolts and regulator ground strap. | - Install the two top rear engine mounting bolts and regulator ground strap. | ||
| - 57-78: \\ Install the 2 top bracket support bolts (one on each head) along with the bracket assembly and the top engine support bolt located between the cylinders. \\ (Be sure reinstall the correct amount of shim washers as removed). | - 57-78: \\ Install the 2 top bracket support bolts (one on each head) along with the bracket assembly and the top engine support bolt located between the cylinders. \\ (Be sure reinstall the correct amount of shim washers as removed). | ||
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| ===== Further Explanation on Installing Motor Mounts from XLForum Members ===== | ===== Further Explanation on Installing Motor Mounts from XLForum Members ===== | ||
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| When following the manual procedures, it's possible and actually common to tighten everything up only to find the motor position has cracked the rear mount. \\ | When following the manual procedures, it's possible and actually common to tighten everything up only to find the motor position has cracked the rear mount. \\ | ||
| - | Your motor needs to be "cradled" in the frame. ((Tim The Grim of the XLFORUM http://xlforum.net/forums/showthread.php?t=1659782&page=3)) \\ | + | Your motor needs to be "cradled" in the frame. ((Tim The Grim of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/154551-iron-vibrations/page3?t=1659782&page=3)) \\ |
| If it's just put in and tightened up it could be out of alignment and stress one area more than others. \\ | If it's just put in and tightened up it could be out of alignment and stress one area more than others. \\ | ||
| That can set up a harmonic that gets worse at a specific rpm range. | That can set up a harmonic that gets worse at a specific rpm range. | ||
| - | The way the rear mount is designed, it determines the motor location. ((ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1384261&page=2)) ((http://xlforum.net/forums/showthread.php?t=1384261&page=4)) \\ | + | The way the rear mount is designed, it determines the motor location. ((ryder rick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/130889-rolling-basket-case-saga-now-it-s-the-rear-motor-mount/page2?t=1384261&page=2)) ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/130889-rolling-basket-case-saga-now-it-s-the-rear-motor-mount/page4?t=1384261&page=4)) \\ |
| **The rear mount has to be tightened first, then the other mounts**. \\ | **The rear mount has to be tightened first, then the other mounts**. \\ | ||
| It's possible to probable that most rear mount breakage can be attributed to improper assembly techniques, broken frames or loose / missing mounts. \\ | It's possible to probable that most rear mount breakage can be attributed to improper assembly techniques, broken frames or loose / missing mounts. \\ | ||
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| ===== All Else Fails ===== | ===== All Else Fails ===== | ||
| - | + | There is sometimes some wiggle room on the rear mount. ((ryder rick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187256-hard-to-get-engine-in-new-hardtail/page5?t=2000446&page=5)) \\ | |
| - | There is sometimes some wiggle room on the rear mount. ((ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=2000446&page=5)) \\ | + | |
| Loosen all the bolts slightly and give it a yank in the direction you need hold and tighten. \\ | Loosen all the bolts slightly and give it a yank in the direction you need hold and tighten. \\ | ||
| DO NOT pull things into position or jam bolts in under pressure! \\ | DO NOT pull things into position or jam bolts in under pressure! \\ | ||
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| Put it together right the first time, or you will be forever breaking down. \\ | Put it together right the first time, or you will be forever breaking down. \\ | ||
| - | Another way to do that is to hang the motor by the center (head mount) on the frame. ((simeli of the XLFORUM http://xlforum.net/forums/showthread.php?t=1683489)) \\ | + | Another way to do that is to hang the motor by the center (head mount) on the frame. ((simeli of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/157364-motor-mount-bolt-on-lower-rear-not-threading?t=1683489)) \\ |
| Use no washers,leave the front mount bolts out and the front mounts loose at the engine. \\ | Use no washers,leave the front mount bolts out and the front mounts loose at the engine. \\ | ||
| Start all of your rear mount bolts but don't tighten them up yet. Start all of your front mount bolts but leave them loose. \\ | Start all of your rear mount bolts but don't tighten them up yet. Start all of your front mount bolts but leave them loose. \\ | ||
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| Snug up the front mounts but not tight. Remove the top mount and add washers until you have about 1/32" play at the top mount. \\ | Snug up the front mounts but not tight. Remove the top mount and add washers until you have about 1/32" play at the top mount. \\ | ||
| Tighten front mount bolts, frame and engine. Tighten top mount and you are done. \\ | Tighten front mount bolts, frame and engine. Tighten top mount and you are done. \\ | ||
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