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1. 08:50 PM - Re: STUCK PROP FLANGE BOLT- HELP ME PLEASE (MHerder)
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| Subject: | Re: STUCK PROP FLANGE BOLT- HELP ME PLEASE |
Hey guys,
To all those that have helped including Pete at US Jabiru (working at 10PM on a
weekday evening talking to the Aussies) Thanks a bunch. Great customer support
as usual. At this point in time I have removed the bolt... That's the good
news, the bad news is that some thread came with it. I'd say that I still have
half of the threads (deeper in) are entirely untouched, and that the "front"
threads are damaged but still grab onto a bolt within a half a turn (so there
is still a good bit of engagement).
The direction given thus far from Jabiru has been to retap, clean up the threads
and attempt to torque to full 30 ft #'s. If I don't get the full torque value,
we'll reinvestigate and look for some other solutions.
I've also purchased some longer UNBRAKO series 1960 Socket Cap screws as specified
with material certficate data and will probably use a one inch bolt in lieu
of the 3/4" standard for 1 of the six bolts. I'll be sure to double check that
it isn't bottoming out and giving me a false torque value, but my initial
measurements show that it should not bottom out as the hole is nearly about .95"
deep and the prop hub is about 5/16" plus a bellville washer. I'll catch a
few more threads than I would have if I used the 3/4". I'll also be making every
attempt possible to safety wire even though it may be damn near impossible
deep in that hub..
If I was reading this post, I'd have been thinking that this is impossible and
that this bone head MHERDER had to have cross threaded this thing. While I'll
admit that I have cross threaded many things in my life doing bone headed things,
this was not one of those instances. My only two theories as to how this
could have happened are now revised.
1) I got a little to agressive cleaning the bolts with the wire wheel and rounded
off th threads. However, please note that I used the same bolt to teast two
other holes with no issues prior to the unlucky one...
2) A piece of steel wire from my brush came loose in the hole that I was cleaning
and caused it to jump a thread.
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One Rivet at a Time!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=289292#289292
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