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techtalk:ih:engmech09a [2021/06/10 20:09] hippysmack created |
techtalk:ih:engmech09a [2023/12/27 21:14] hippysmack |
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| - | ===== Removing / Installing Motor Mounts ===== | + | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] |
| + | ====== IH: Engine Mechanicals - Sub-09A ====== | ||
| + | ===== 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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| - 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). | ||
| - | + | ===== Further Explanation on Installing Motor Mounts from XLForum Members ===== | |
| - | ===== Further explanation on installing motor mounts from XLForum members ===== | + | |
| 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 mounts should fit nicely and naturally before tightening. \\ | All mounts should fit nicely and naturally before tightening. \\ | ||
| - | - The rear mount is fixed (as in not adjustable). \\ It has to be tightened first to the motor (snug the top 2 bolts, tighten the 3 lower nuts / bolts then tighten the top 2). \\ Then tighten the 4 frame to mount bolts before even installing the other mounts. \\ See [[techtalk:ih:engmech09#rear_mounts|Rear Mounts]] below for more details. | + | - The rear mount is fixed (as in not adjustable). \\ It has to be tightened first to the motor (snug the top 2 bolts, tighten the 3 lower nuts / bolts then tighten the top 2). \\ Then tighten the 4 frame to mount bolts before even installing the other mounts. \\ See [[techtalk:ih:engmech09#rear_mounts|Rear Mounts]] on the main IH Motor Mount Page for more details. |
| - | - After the rear mount is tightened, then install the front mounts. \\ Take care to keep the motor in it's natural position after rear mount is tightened. Do not pull or wedge the motor against the rear mount. \\ If things don't fit right, perhaps the frame is bent or the rear mount position on the motor needs to be adjusted (which is difficult if not impossible). \\ Keep in mind that all bolts must go through all of the parts without any binding AFTER the rear mount is tight. \\ Work on any front bolt holes with a rat tail file to slot any holes in the plates that do not line up perfectly. \\ (The bolts must pass through with no interference). \\ Pay special attention to the use and correct positioning of front mount spacers and grippy washers (OEM recommended). \\ **NOTE**: \\ There are many aftermarket front mount bolts that are longer to facilitate installing forward footpeg mounting brackets that get sandwiched with the mount plates. \\ Do not install a long bolt in the front mount upper rear position (you'll break the cases!). \\ See [[techtalk:ih:engmech09#lower_front_mounts|Lower Front Mounts]] below for more details. | + | - After the rear mount is tightened, then install the front mounts. \\ Take care to keep the motor in it's natural position after rear mount is tightened. Do not pull or wedge the motor against the rear mount. \\ If things don't fit right, perhaps the frame is bent or the rear mount position on the motor needs to be adjusted (which is difficult if not impossible). \\ Keep in mind that all bolts must go through all of the parts without any binding AFTER the rear mount is tight. \\ Work on any front bolt holes with a rat tail file to slot any holes in the plates that do not line up perfectly. \\ (The bolts must pass through with no interference). \\ Pay special attention to the use and correct positioning of front mount spacers and grippy washers (OEM recommended). \\ **NOTE**: \\ There are many aftermarket front mount bolts that are longer to facilitate installing forward footpeg mounting brackets that get sandwiched with the mount plates. \\ Do not install a long bolt in the front mount upper rear position (you'll break the cases!). \\ See [[techtalk:ih:engmech09#lower_front_mounts|Lower Front Mounts]] on the main IH Motor Mount Page for more details. |
| - | - After the front mount bolts are tightened, install the top mounting bracket(s). \\ Shim any gaps in the upper mount(s) or slot bolt holes as needed with large diameter washers. \\ [[techtalk:ih:engmech09v|Click Here]] to read more on shims in the Sportsterpedia. \\ See [[techtalk:ih:engmech09#top_mounts|Top Mounts]] below for more details per year model. | + | - After the front mount bolts are tightened, install the top mounting bracket(s). \\ Shim any gaps in the upper mount(s) or slot bolt holes as needed with large diameter washers. \\ [[techtalk:ih:engmech09b|Click Here]] to read more on shims in the Sportsterpedia. \\ See [[techtalk:ih:engmech09#top_mounts|Top Mounts]] on the main IH Motor Mount Page for links to more details per year model. |
| - | **All else fails**; \\ | + | ===== All Else Fails ===== |
| - | 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)) \\ | + | 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)) \\ |
| 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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