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Author Topic: What a stupid thing to do  (Read 2651 times)

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Nick W

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What a stupid thing to do
« on: 04 January 2017, 19:07:39 »

Clean and regrease the bearings on the wheels, and we're changing the brake discs, so remove old ones.


OK


So after doing the bearings on the first wheel, I started on the 9 nuts and bolts retaining the disc. Which got harder the more I undid, and the last bolts didn't fall out.


Then there was a loud bang, and something hit me in the face.


Some utter oppswit had forgotton to let the bloody tyre down  :o :o :o :o


So that's five bent bolts at a tenner each, and a very scary moment.

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Doctor Gollum

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Re: What a stupid thing to do
« Reply #1 on: 04 January 2017, 20:29:02 »

Could have been worse... might have been an angle grinder :D
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Andy H

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Re: What a stupid thing to do
« Reply #2 on: 04 January 2017, 22:27:09 »

Clean and regrease the bearings on the wheels, and we're changing the brake discs, so remove old ones.


OK


So after doing the bearings on the first wheel, I started on the 9 nuts and bolts retaining the disc. Which got harder the more I undid, and the last bolts didn't fall out.


Then there was a loud bang, and something hit me in the face.


Some utter oppswit had forgotton to let the bloody tyre down  :o :o :o :o


So that's five bent bolts at a tenner each, and a very scary moment.
I've read this through 5 times and I still cannot guess what letting the tyre down has to do with removing a brake disc :-\ or why there are 9 nuts & bolts  :-\

I imagine you will give us more details when the swelling subsides.......

In all seriousness it sounds like you had a close shave there & I hope you didn't take too big a kit.
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Shackeng

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Re: What a stupid thing to do
« Reply #3 on: 04 January 2017, 22:32:54 »

A lorry wheel perhaps? :-\ :-\ :-\
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Doctor Gollum

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Re: What a stupid thing to do
« Reply #4 on: 04 January 2017, 22:37:25 »

Nah, be aircraft related, disc mounted to the hub of a two piece wheel at a guess...

Hopefully nothing too drastic/painful  ;)
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ronnyd

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Re: What a stupid thing to do
« Reply #5 on: 04 January 2017, 22:38:28 »

Five wheel bolts and four holding disc? ??? :-\
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Re: What a stupid thing to do
« Reply #6 on: 04 January 2017, 22:45:24 »

Five wheel bolts and four holding disc? ??? :-\
All nine through at least three pieces of metal perhaps  :-\

Summat like this:

http://www.kitplanes.com/issues/31_6/shop_talk/maintenance_matters_june_2014_21016-1.html ;)
« Last Edit: 04 January 2017, 22:49:22 by Doctor Gollum »
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ronnyd

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Re: What a stupid thing to do
« Reply #7 on: 04 January 2017, 22:54:35 »

Oh, i see, i lead a sheltered life you know. ;D
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Nick W

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Re: What a stupid thing to do
« Reply #8 on: 04 January 2017, 23:17:58 »

It's off a big Cessna.
The wheel is in three pieces, inner and outer like you would expect, plus a central spacer for the inner tube to push against; all clamped together by nine nuts and bolts that also hold the brake disc. I had the tyre between my knees, and got four of the bolts out before the pressure started pushing the assembly apart, jamming the remaining ones in place. The eighth nut was what hit me in the face, and the five stuck bolts were bent about thirty degrees. They're high-quality 3/8", which should give some idea of the force involved. I had to use a cut-off wheel to get them out.
 
It could have been very painful. And expensive.


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ronnyd

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Re: What a stupid thing to do
« Reply #9 on: 04 January 2017, 23:28:17 »

Sounds like you had a very lucky escape. :o
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Rods2

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Re: What a stupid thing to do
« Reply #10 on: 05 January 2017, 12:30:54 »

That you are okay is the main thing. Much easier to replace mechanical parts than human bits. ::) ::) ::)
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Shackeng

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Re: What a stupid thing to do
« Reply #11 on: 05 January 2017, 13:03:51 »

Is there not a recommended procedure involving decompression before dismantling? Having worked on and in both fighter and large transport aircraft for 40 odd years, this was invariably the case. But perhaps for light aircraft there is no set procedure in this instance. :-\ :-\ :-\
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Nick W

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Re: What a stupid thing to do
« Reply #12 on: 05 January 2017, 13:09:00 »

Is there not a recommended procedure involving decompression before dismantling? Having worked on and in both fighter and large transport aircraft for 40 odd years, this was invariably the case. But perhaps for light aircraft there is no set procedure in this instance. :-\ :-\ :-\

Entirely carelessness on my part. And it's not something I am likely to do again.
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Shackeng

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Re: What a stupid thing to do
« Reply #13 on: 05 January 2017, 13:13:19 »

 :y
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Andy H

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Re: What a stupid thing to do
« Reply #14 on: 05 January 2017, 13:19:58 »

What pressure do Cessna tyres run at?
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