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> 914 gearbox metal mixture
MikaM
post Aug 11 2016, 10:42 AM
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I need information how to weld gearbox 914/-70, mixture or welding instructions (IMG:style_emoticons/default/smile.gif) Mine has some cranks near the starter motor..

Thank you (IMG:style_emoticons/default/smile.gif)

-Mika
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bretth
post Aug 11 2016, 12:10 PM
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Welding Aluminum is not easy. I have seen pros screw it up. Maybe someone else will have better info but you may need to take it to a pro if you have never welded AL before.

Brett
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Dave_Darling
post Aug 11 2016, 12:17 PM
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Isn't the transmission case a magnesium-aluminum alloy? If so, it's even harder to weld.

--DD
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Beebo Kanelle
post Aug 11 2016, 12:50 PM
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http://www.locknstitch.com
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Mark Henry
post Aug 11 2016, 01:10 PM
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Mag is hard to weld and it warps, you can do it with just gas welding, but you need the correct welding rod. Stuff has to be super clean.
You can only weld about a 1/4" at a time in a couple different places on the case, let it fully cool, repeat, until you're done.

Bug drag guys often weld bars (gussets) to the bottom of the case, to keep them from breaking, it can take a couple of weeks to weld them in fully.
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MikaM
post Aug 12 2016, 04:18 AM
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Thanks (IMG:style_emoticons/default/smile.gif) I'll try to get it welded in some specialist..
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bretth
post Aug 12 2016, 08:27 AM
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QUOTE(Dave_Darling @ Aug 11 2016, 02:17 PM) *

Isn't the transmission case a magnesium-aluminum alloy? If so, it's even harder to weld.

--DD


Oh crap if it's Magnesium then even worse for sure.
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Krieger
post Aug 12 2016, 09:02 AM
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What would it cost you to replace the entire tranny vs welding?
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mlindner
post Aug 12 2016, 10:55 AM
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Mike...are you sure they are cracks, a lot of casting marks look like cracks but are not. Best, Mark
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mb911
post Aug 12 2016, 11:22 AM
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They are magnesium. I weld 911 fans and housings weekly for customer's. I have very expensive mag rod $900 for 4 lbs.. Oxy is a new one to me as mag is flamable. TIG uses inert gas so it can't start on fire with oxygen.
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MikaM
post Aug 12 2016, 11:29 AM
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I'm quite sure (IMG:style_emoticons/default/welder.gif)

https://pix.sfly.com/_0_1rY
https://pix.sfly.com/RZ_qjU

-MikaM
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stugray
post Aug 12 2016, 11:31 AM
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QUOTE(Krieger @ Aug 12 2016, 09:02 AM) *

What would it cost you to replace the entire tranny vs welding?


I was going to suggest the same thing.
A new (used) case can be had for a couple $100.
Welders that can weld that START at a couple $100 an hour and there is no guarantee the case wont warp.
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MikaM
post Aug 12 2016, 11:37 AM
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QUOTE(Krieger @ Aug 12 2016, 06:02 PM) *

What would it cost you to replace the entire tranny vs welding?


Here in Finland a lot, you probably have to ship it somewhere else (IMG:style_emoticons/default/wink.gif) I have few connection's to schools where they teach welding.. I,m counting on these friends (IMG:style_emoticons/default/smile.gif)
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Mark Henry
post Aug 12 2016, 12:14 PM
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https://www.youtube.com/watch?v=weqTWwaaL0g
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MikaM
post Aug 12 2016, 12:40 PM
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QUOTE(Mark Henry @ Aug 12 2016, 09:14 PM) *


https://www.youtube.com/watch?v=weqTWwaaL0g



Thanks (IMG:style_emoticons/default/biggrin.gif)
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76-914
post Aug 12 2016, 01:02 PM
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I have a case that you can have for the price of shipping. Pm me if you want it. Kent
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MikaM
post Aug 13 2016, 08:23 AM
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PM send (IMG:style_emoticons/default/smile.gif)
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stugray
post Aug 13 2016, 12:49 PM
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QUOTE(76-914 @ Aug 12 2016, 01:02 PM) *

I have a case that you can have for the price of shipping. Pm me if you want it. Kent


I have always wondered: IF you move a core & the diff that goes with the core from one case to another, do you have to reset the pinion depth?
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oldie914
post Aug 14 2016, 02:13 AM
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I also have a case you can have. Shipping from Germany to Finnland would cost about Euro 30. If you are interested, I will send pictures.
Keep in mind you will need to readjust the R&P if you change the case. Need to set pinion depth, differential bearing preload and backlash.
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MikaM
post Aug 14 2016, 03:14 AM
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QUOTE(oldie914 @ Aug 14 2016, 11:13 AM) *

I also have a case you can have. Shipping from Germany to Finnland would cost about Euro 30. If you are interested, I will send pictures.
Keep in mind you will need to readjust the R&P if you change the case. Need to set pinion depth, differential bearing preload and backlash.


What R&P mean? I sent you PM (IMG:style_emoticons/default/smile.gif)
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