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no they weren’t, if so wouldn’t that break the loc tite anyways ?
Good point (that I've never considered until you mentioned it,) but it something I've always done when mating steel and aluminum. (I've not found a loosened bolt yet.)
I don't crack the bolts loose, I just confirm the correct torque (clockwise.)
Good point (that I've never considered until you mentioned it,) but it something I've always done when mating steel and aluminum. (I've not found a loosened bolt yet.)
I don't crack the bolts loose, I just confirm the correct torque (clockwise.)
I think you do that and if they move, you remove, clean hole/bolt, relocktite and retorque.
In order to perform that check with a locking plate, you'd have to remove the plate which in this case probably means removing the wheel..
Powder coating is a thick finish to start with, get a couple layers stacked with various parts you can end up with .030" or more being potentially soft material that will squish out under loading.
Played this game in the professional world with custom production and process machinery we built and the department managers obsession with everything looking pretty for the tour routes, everything went out for powder coating. All critical surfaces had to cleaned to bare metal again or stuff always loosened up. Even heavy handed show chrome can give headaches with this on mating surfaces.
The OPs broken bolts look like they are 7/16 and not necked down. The one I show is not necked down.
Saftey wire won't help if the foundation is allowed to collapse. Do you think that the OPs bolts unscrewed themselves?
I see now. Bolts he used are not wasted / necked down. These are my 2015 FXDB original bolts. With .437" bolt shoulders the pulley bores are too large. Also the bolt threads are not supported in the wheel counterbores. The bolts broke from shear at the thread which are stress risers.
Lock wire would not have prevented them from loosing. Although wireing does show some evidence of keeping a bolt tight, it's more to prevent a loose bolt from falling out.
I see now. Bolts he used are not wasted / necked down. These are my 2015 FXDB original bolts. With .437" bolt shoulders the pulley bores are too large. Also the bolt threads are not supported in the wheel counterbores. The bolts broke from shear at the thread which are stress risers.
... What is puzzling is that it can get so bad before someone realizes it's happened ... You'd think that there would be a serious racket, vibration etc
Heard way to many times in my career "It just started today" LOL
No doubt ... So your explanation is the inherent design of the wheel, pulley, fasteners, service procedure, inept mechanics ? ... It appears as though this doesn't happen until it has been serviced, correct? ... What is puzzling is that it can get so bad before someone realizes it's happened ... You'd think that there would be a serious racket, vibration etc
Loud pipes save lives but let your pulley bolts die..
07-09-2023, 12:15 PM
