Question about Smokebox kit

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Post  milford59 on Tue 31 Dec 2019, 6:54 pm

I haven’t got Kit 3 yet, but I have been reading the instructions that Dean kindly sent me to look at, before the kit arrives.

Can someone please explain why some of the bolts are made of copper ?

Thanks very much.

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Post  Simon C on Tue 31 Dec 2019, 7:36 pm

milford59 wrote:I haven’t got Kit 3 yet, but I have been reading the instructions that Dean kindly sent me to look at, before the kit arrives.

Can someone please explain why some of the bolts are made of copper ?

Thanks very much.

The copper rivets are for connecting the chimney base collar to the top of the smoke box, because of the radius these rivets will need to be bent to match the profile of the base.
Do not panic you put the rivets in then using a soft faced hammer to persuade them into place the soft copper making the task easier.
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Post  milford59 on Wed 01 Jan 2020, 9:32 am

Thank you very much Simon - I expect it will be become clear once I actually get the kit Surprised

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Post  Steve Traill on Tue 07 Jan 2020, 12:09 pm

The threads on the copper rivets are very soft especially after a few steamings. When I went to change the chimney base on the aggi I noticed that the threads on two bolts were effectively stripped. I made up new dome headed bolts from mild steel by putting a standard bolt of similar size in a cordless drill and holding it against a grinder until the head is rounded. I then bolted the base down with them and to finish off used the rivet dolly for the wheels to give it a good wack so it seats properly & then finally tighten it up. The other worry I had is when the engine is cold and one is moving it about on the rally field people offer to help and their first place to push the engine is by pushing from the chimney! those copper bolts are very weak. I've done this on the crane engine as well and put the copper bolts in the glory box.
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Post  milford59 on Wed 08 Jan 2020, 2:46 pm

Thanks very much Steve - that is certainly a plan to consider.

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Post  Simon C on Sun 12 Jan 2020, 9:43 pm

Before you beef up the rivets in the chimney base ask yourself the question.
Is it better to replace a copper rivet or replace a bottom casting and if the casting doesn't brake then worse still the chimney could get bent.
The muppets will still want to help so keep it as muppet friendly as possible is my suggestion.
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Post  lynnr on Mon 13 Jan 2020, 8:26 am

My chimney on Crystal is still the original copper and she was pushed around by the chimney before the roof went on.
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