North Rhino 05 Deflate Valve leakage problem

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safetyboy
safetyboy
NSW
58 posts
NSW, 58 posts
29 Jan 2009 10:03pm
I have a second hand 05 rhino that is in pretty good condition, but it is giving me one issue.

On inflating, the deflate valve leaks. It doesn't seem to be the actual plug in the valve causing the problem, but somewhere around the seat of the valve.

If I get someone to hold it flat against the other side of the leading edge while I pump (so basically sealed by the other side of the bladder), by the time that there is enough pressure in the LE that they can't hold it closed anymore the leak stops.

It seems like something somewhere isn't seated right, but under decent pressure (5-6 psi) it stops leaking.

After it is inflated, I can happily have a 2 hour session without any sign of deflation.

This is obviously a PIA when trying to rig the kite, and seems like it is going to lead to bigger issues. Can anyone point me to what might be the cause of the problem?

SB
Robbo2099
Robbo2099
WA
753 posts
WA, 753 posts
29 Jan 2009 10:13pm
This is becoming an increasingly common issue amongst kites of this vintage.

There appears to have been a large lot of bladders to have come out a common manufacturing facility where the valves were not properly attached to the latex bladder. I've seen a dozen myself in the last 12 months. Over time, when exposed to heat and with usage, they valve just peels off the latex.

My 06 Slingshot Fuel has had 6 of the valves peel away in the last few months.

Having seen a number of these abruptly let go and dump all the air from the leading edge, it's NOT a good idea to keep kiting on these til you fix them or you'll soon find yourself 1km out to sea with a deflated kite.

There is another thread that's been running for a bit that addresses how to fix these. I'd advise against the PVC plumbers' glue, but have had good success with the stick-on valves you can get from your local kite shops as well as using contact cement and adding another layer of bladder materials OVER the valve after you've put it back on with contact cement to ensure there's no chance of the air getting out.

The other thread is at:

www.seabreeze.com.au/forums/topic.asp?TOPIC_ID=46385
Phezulu1
Phezulu1
WA
66 posts
WA, 66 posts
29 Jan 2009 10:37pm
Hi
I've had North kites since 2004 and had this happen lots, the big deflate valves seem most prone to it. I've tried all kinds of things, contact cement works for awhile but pulls off again. Best is the Selleys urethane glue you buy at Bunnings. First pull the valve off completely with methylated spirits, they come off easy, then put the glue on both surfaces and join. I then put the bladder on a flat surface like a piece of wood and put a biggish socket (like 36-40) over the top of the valve and rest a brick on the socket so it compresses the 2 surfaces, leave it over night.

I've never had one fixed like this leak again, put the bladder back in with plenty baby powder.

Good luck
safetyboy
safetyboy
NSW
58 posts
NSW, 58 posts
30 Jan 2009 9:18am
So this may be a stupid question, but do I have to take the bladder out to do this repair?

Are there any websites with tips to do this, or should I just search the forums?

I have had a look at how to pull the bladder out - there is a zip near the inflate valve, but I can't see how the deflate valve gets into the leading edge and pulled through - it looks like it is anchored there somehow?

SB
Phezulu1
Phezulu1
WA
66 posts
WA, 66 posts
30 Jan 2009 9:00am
No need to pull out bladder completely for the deflate valve, at the wing tip there is a flap of material which is folded back and held with velcro, open the flap and you can see where the tip of the bladder is tucked in to it.

Push the valve back into the leading edge, and then pull on the tip of the bladder while you concertina the leading edge, it is no problem to pull out enough bladder to get to the valve.
safetyboy
safetyboy
NSW
58 posts
NSW, 58 posts
1 Feb 2009 12:30am
So I pulled the valve out on Friday night, glued it up with the Selleys glue, put a Vitamin C bottle over it, put a brick over it, went to bed, got up in the morning and it was golden.

Got to the beach, cranking 20 knots, leading edge and two struts wouldn't stay up :-(

Got it home tonight pulled ever bladder out. 4 of the 7 struts are leaking, and the main valve is rooted as well.

I am about to sort them all - anyone have any opinions on the three remaining struts? Should I try to pry the valve off (harder than on the ones that are delaminating) or should I leave them be? Is it just a matter of time for the ones that haven't gone?

SB

PS - happy ending to the story - borrowed my mates 09 12m Rebel, had a blast. There were green arrows everywhere - was struggling to navigate around them out on the water.
spot1
spot1
WA
1588 posts
WA, 1588 posts
1 Feb 2009 12:35am
i have an old rhino for sale $45
spare parts may be
safetyboy
safetyboy
NSW
58 posts
NSW, 58 posts
1 Feb 2009 11:37am
Well, just in case anyone followed along, I decided leaving them on was stupid, so I stayed up until 1am doing all of the struts, as well as the inflate valve.

The ones that looked fine came off super easy as soon as they got a sniff of Metho - no question they needed to be done.

I didn't have enough Sockets (or anything else that size), so I clamped them with clothes pegs and cardboard - did the job fine.

Bitch of a job - now I have to get the struts all back in :-(

At least it is a nice sense of satisfaction to have looked inside the kite, fixed a couple of things up and know what is under there, and that my valves will definitely stay up next time!

SB
peter_w
peter_w
NSW
68 posts
NSW, 68 posts
1 Feb 2009 9:02pm
FYI My 07 Rebel is doing this at the moment and 04 Rhino also suffered the same fate. Top work North.
tmiddled
tmiddled
NSW
253 posts
NSW, 253 posts
1 Feb 2009 9:18pm
I think it is an issue with all kites, not just North. I've been told leaving them in a hot car causes problems.

I just repaired my Slingshot valves, in which EVERY SINGLE strut bladder was leaking after leaving it in my car on a 40 degree day.

But I still do it. Couldn't kite after work if they weren't in there :) Just try and find some shade, and if I have to fix the valves again, so be it.
Phezulu1
Phezulu1
WA
66 posts
WA, 66 posts
1 Feb 2009 9:29pm
Safetyboy, it's a bit of a schlep to start with, but when you get the hang of it, pretty easy. Just make sure when you put the strut bladders back that the bladder reaches the front of the strut, pump it up slowly and make sure you feel for "hollow" patches where the bladder hasn't reached, and let the air ou and wiggle the bladder till it fills the strut completely.
kk
kk
WA
953 posts
kk kk
WA, 953 posts
1 Feb 2009 11:02pm
If you poke the end of the bladder back inside itself before feeding it back into the strut it won't give you the problem of the bladder folding back on it's self... If ya know what I mean?
toml
toml
VIC
11 posts
VIC, 11 posts
7 Feb 2009 12:54pm
I can confirm this is not a problem just with North kites. I have 2 Naish kites (06 boxer and 07 torch) that have independently got this problem just recently. Both times the dump valve is the culprit.

Thanks for all the info on this thread. Looks like I've got some gluing to do!!
BBQBOB
BBQBOB
SA
2 posts
SA, 2 posts
7 Feb 2009 1:04pm
hi
I bought a couple of 05 North Rhino's to start my kiteboarding journey with and was encouraged not to learn on them. I ended up with a 07 Ocean Rodeo One wich has been ok and I'm getting there, well my walks of shame are getting shorter.

I tried out the rhino and felt it had a lot more power for the same size kite but I had a lot of trouble controlling it.

should I keep the rhino's for later when I am able to cope with them a little easier?
They seem to have a lot of grunt, do you guys have trouble with them or is mine just rigged badly?

Thanks

badey
badey
NT
34 posts
NT, 34 posts
7 Feb 2009 12:34pm
keep the rhinos. they are sick kites and pull like trains. i've still got an 06 12m that I think would be easy enough to learn on, and sweet once you get good. Relaunching on a 5th line is faster than any other full depowered relaunch i've seen. Those 09 fuels are tempting though...

My dump valve also peeled off last year. I ended up placing a stick on patch on the inside (tricky..) and a replacement stick on dump valve on the outside, then i poked a hole in the inside patch. Its held up fine. Havn't had any of the other valves go...though i'm wary of leaving it in my car on hot days now (not that i'm sure this does anything to the glue..but rumour has it..)

The grip on my bar has also started to peel off in places. I replaced that with some triathelon road bike grip wound tightly on to the bar. Feels great and its holding up fine so far.

Anyway, north should bring back a C version of the rhino.
myusernam
myusernam
QLD
6160 posts
QLD, 6160 posts
7 Feb 2009 2:17pm
I had this problem with my 06 naish - at first it was the dump valve...
but then the problem spread and I pretty much needed to do all of the valves. Couldn;t kite for ages because the stupid kite kept going down. Interestingly the octopus connections seemed to be glued on differently and didn't leak, but I had to glue on almost every vavle before I got rid of the heap o crap and swore never to buy another. I think naish and north and maybe even ss have similar construction. Maybee somone can shed light on this issue. I think it is when the valves are glued and not heat welded to the bladder and the glue eventually disintegrates. For what it's worth I have heard from a kiteshop owner that one of the kites that dont seem to share this particular problem is cabrinha. (not trying to pimp - I do own cabrinha and slingshot kites). All I can say is that when it started with my dump valve it was only the beginning of a bad experience
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