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Old 10-25-2012, 02:11 PM   #1 (permalink)
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cracked 91 cui ninja tank

hi guys I want some advice on an issue a friend of mine has.

He bought a brand new Ninja 91cui tank, some time later he lent it to a mutual friend (still unused) anway he got it back and when he checked it there is a large crack running rounf the neck and down both side's of the tank (down to the logo) and there look like a small ding on the fill dial. Oh and it still has a 1000 psi in it.

My question is

1, is it safe to fill (i am thinking not but my friend is really pissed so wants to use it)
2 why would it still hold air?
3 can it be repaired?
4 does this look like it was dropped on its reg, has anyone seen heard fo this before....is it a manufacturing issue?

cheers G
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Old 10-25-2012, 02:18 PM   #2 (permalink)
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I would contact Ninja directly, and get the professional advice.

But I'm with you on saying, it should not be filled if it has a crack.
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Old 10-25-2012, 02:19 PM   #3 (permalink)
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Carbon tank I'm guessing?

I wouldn't use it again and would empty the tank.

I've never heard of someone being able to repair tanks but I'm sure someone here can help.

Question is if it has that much damage what did your mural friend do to it?
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Old 10-25-2012, 02:21 PM   #4 (permalink)
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There are a bunch of threads about this:

https://www.mcarterbrown.com/forums/p...ing-crack.html

It might just be the cosmetic coating. Do yourself a favour and replace it with one of their Grey Ghost tanks, you won't have to worry about the pretty coating cracking and calling into question your safety.
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Old 10-25-2012, 02:24 PM   #5 (permalink)
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Step 1 take pic
Step 2 look if any fiber is showing
Step 3A if fiber is seen(ding in it or not flat) Do not use tank
Step 3B use https://www.mcarterbrown.com/forums/p...ing-crack.html
Send them thr pics as well
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Old 10-25-2012, 02:44 PM   #6 (permalink)
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If its just the expoxy coating just send it in to be fixed.
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Old 10-25-2012, 03:13 PM   #7 (permalink)
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Or you could send it in to have them replace it with a grey tank. It will just crack again, leaving you with field operators questioning to safety of your tank. Add to that the shipping cost and time and sending it back to Ninja repeatedly, and there is no reason to use their black coated tanks.
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Old 10-25-2012, 03:33 PM   #8 (permalink)
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cheers guys I will let him know......shipping might be an issue, but hey its up to him to make that choice.

yes I did wonder what our "friend" did, his place it a bit of a pig stye and I wonder if it rolled off his work bench and landed on the floor, or any number of objects he has littering the place.
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Old 10-25-2012, 03:40 PM   #9 (permalink)
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I personally would empty the tank and warranty it out. Don't take chances with potentially cracked bottle, it could be a ticking time bomb.
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Old 10-25-2012, 06:59 PM   #10 (permalink)
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This is from the recent batch of bad tanks with the defective finish. It doesn't take much to have the entire thing crack and look like it got dropped from 2 stories.

I know two different people had it happen, one just had it in his gearbag rolling around which shouldn't do anything, one guy babies his stuff, they both ended up with the same amount of crazy cracks. Ninja will take care of it.
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