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Old December 29th, 2012, 08:34 PM   #1
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Default Welding on axle, pinion seal explodes out.

Have a small pin hole leak on the axle tube from when I cut off the old spring perch and welded on a new one to fix the pinion angle.

Went to weld it up and the pinion seal shot out violently causing oil to go everywhere.

I did not think gear oil was flamable ? I know you can take hot cherry red steel and use oil to quench.

Any idea wtf happend??
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Old December 29th, 2012, 08:55 PM   #2
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Was axle vent hose plugged? That where pressure try get out due heat of weld expanding inside.
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Old December 29th, 2012, 08:57 PM   #3
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Did you use brake cleaner on it just before you started welding? Is your vent on the axle plugged up?
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Old December 29th, 2012, 08:57 PM   #4
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Maybe your vent tube is plugged and the heat built up too much pressure?
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Old December 29th, 2012, 09:15 PM   #5
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Maybe it was the vent tube. Is it clogged?
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Old December 29th, 2012, 09:30 PM   #6
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I sprayed break clean on the inside to clean out crap. Than filled it hr after. This is a 9". I didn't weld till an hour after the fill. Guess it could of been brake clean..... not sure on vent tube. I will have to check.
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Old December 30th, 2012, 10:01 AM   #7
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I sprayed break clean on the inside to clean out crap. Than filled it hr after. This is a 9". I didn't weld till an hour after the fill. Guess it could of been brake clean..... not sure on vent tube. I will have to check.
Def from the brake clean. Hope it wasnt the bad stuff to weld on.
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Old December 30th, 2012, 10:25 AM   #8
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Don't use brake clean, not safe
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Old December 30th, 2012, 10:34 AM   #9
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Def from the brake clean. Hope it wasnt the bad stuff to weld on.
The bad stuff will not explode.
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Old December 30th, 2012, 05:25 PM   #10
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Never ever ever use brake clean before welding. Look through my topics I have posted, I put one up a year ago or so about it. Use acetone or denatured alcohol to clean something, it won't kill you or cause serious damage to your insides unlike brake clean. I know not all brake clean is dangerous but I find it best to just not use it.
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Old January 5th, 2013, 03:56 PM   #11
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I did not think gear oil was flamable ?
Any petroleum product is flammable.
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Old January 5th, 2013, 04:25 PM   #12
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Did anyone mention the vent tube? It might be clogged.
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Old January 5th, 2013, 04:29 PM   #13
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Did anyone mention the vent tube? It might be clogged.
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Old January 6th, 2013, 08:52 AM   #14
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Check the vent tube, might be clogged
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Old January 6th, 2013, 09:05 AM   #15
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There are vent tubes on axles? How do I keep the water and mud out? Man I gotta weld mine shut before I destroy the axles.
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Old January 6th, 2013, 09:07 AM   #16
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There are vent tubes on axles? How do I keep the water and mud out? Man I gotta weld mine shut before I destroy the axles.
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Old January 6th, 2013, 10:34 AM   #17
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Putting cherry hot steel into oil can cause it to flame up....but it's not explosive like brake clean can be....and yeah never use it when welding. Acetone is the stuff, evaporates fast and cleans every-damn-thing off steel pretty quickly usually.

It's typically good practice to weld on tubing that allows internal pressures to escape. Also a bad idea to weld on steel that has liquid on the inside. It's one thing to put a couple tack welds down....but when you start laying actual beads there is alot more things going on. Coatings on steel, oil films, crud, paint and whatever you spray are all stuff that could ignite at worst and will most likely burn in a matter that creates gas/air pressure pretty damn quick as you found out.

Good news is you learned NEVER to weld with brake clean and possibly DIE, your going to fix your breather tube that would have been a issue, and your axle is getting new seals and fresh gear lube.

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Old January 6th, 2013, 11:23 AM   #18
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It was a small hole i was welding up...pin hole size. I was using flux core wire, not gas. I read its when you use the shielding gas its bad.
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Old January 6th, 2013, 11:24 AM   #19
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flux core is burns hotter than gas
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Old January 6th, 2013, 11:27 AM   #20
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this was posted on here once
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