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techtalk:evo:oil03 [2019/08/05 11:45] ixl2relax [Bronze Oil Pump Drive Gear Upgrade (26391-06)] |
techtalk:evo:oil03 [2019/08/05 11:49] ixl2relax [Known Drive Gear Failure] |
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| * This is a common failure in Sportsters, even when nothing gets into the pump to lock it up first. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1848987)) The teeth get sharp and then they break off. \\ If something gets into the pump and locks it up, the teeth get ripped off the gear. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1974986&highlight=bronze+drive+gear&page=3)) | * This is a common failure in Sportsters, even when nothing gets into the pump to lock it up first. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1848987)) The teeth get sharp and then they break off. \\ If something gets into the pump and locks it up, the teeth get ripped off the gear. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1974986&highlight=bronze+drive+gear&page=3)) | ||
| + | * The OEM gear is hardened on the surface, but once that is worn through it will wear extremely fast. ((Scuba10jdl http://xlforum.net/forums/showthread.php?t=2002257&highlight=pinion+gear+part+number)) | ||
| * The failure happens because of pinion shaft runout which causes the engagement depth of the teeth to change as the pinion shaft rotates. \\ What happens is the gear will wear badly in one area. You'll see the teeth getting real sharp there. 180 degrees from that spot, the gear will look like new. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1920827&highlight=pinion+gear+locking+tool&page=2)) | * The failure happens because of pinion shaft runout which causes the engagement depth of the teeth to change as the pinion shaft rotates. \\ What happens is the gear will wear badly in one area. You'll see the teeth getting real sharp there. 180 degrees from that spot, the gear will look like new. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1920827&highlight=pinion+gear+locking+tool&page=2)) | ||
| * So lots of people get fooled when they check the gear. They'll look at the visible portion from their vantage point only. \\ You have to look all the way around the gear though. The wear will be isolated to one area only. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1920827&highlight=pinion+gear+locking+tool&page=2)) | * So lots of people get fooled when they check the gear. They'll look at the visible portion from their vantage point only. \\ You have to look all the way around the gear though. The wear will be isolated to one area only. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1920827&highlight=pinion+gear+locking+tool&page=2)) | ||
