Solved: CPS 1700 spraying wildly

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Cyrioz
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Solved: CPS 1700 spraying wildly

Postby Cyrioz » Wed Jul 09, 2014 5:17 am

[Update: This issue was solved, just scroll down or click here: topic6592.html#p59041]

Hi together
This is the first time I'm writing something in this board, until now I was only an interested reader. I'm sorry for my english btw, as it is not my native language.

I've got a problem with my CPS 1700 exactly as explained in this article: http://www.sscentral.org/repairs/spraying.html
The plastic grid, which normally produces a laminar stream, is stuck sideways and sometimes changes its location so that the stream is normal again from time to time. I could even move it with some pressured air blowing in.

My question now is: How do I fix this the most secure way? The article above is not that detailed and I hesitate to saw through to nozzle tube.
I also tried to open the firing valve, but it seems to be glued pretty well together. Is this glue only on the outside, or are the contact areas of the both parts completely glued? I suppose this might be different in certain versions of the 1500/1700, because I've seen some articles in which the firing chamber was only hold together by screws, not glue.

FYI: I've got another firing valve with nozzle (CPS 1500) as a spare part, which I could use. If this could help somehow.

Thank you very much for your help!

[Update: This issue was solved, just scroll down or click here: topic6592.html#p59041]
Last edited by Cyrioz on Sat Jul 26, 2014 3:29 pm, edited 1 time in total.

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soakinader
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Re: Need Help: CPS 1700 spraying wildly

Postby soakinader » Wed Jul 09, 2014 12:05 pm

Hi there,

So a couple of things. First, is it the outside plastic grid? And not the mesh screen?
You might be able to fix the grid with a few small drops of superglue. You also might have to saw the laminator open to do this!

I don't believe that opening the firing valve will help you. If you really want to open it, use a combination of grinding/sanding and cutting/chipping at the glue on the outside. Then, you will need to carefully run a thin knife/razor blade about 1/8" of the way around the entire perimeter. Then you should be able to pry it open. Sometimes you can just find a good spot to cut at and wedge something into the gap and pry it open (again, use your head! Don't break it!).

topic6557.html#p58623
This post has some details (pictures!) about the nozzle laminator.

Oh and the CPS 1500 parts are either identical to the 1700 or not. So if it looks like you can replace it, you probably can.

Please take some pictures of your gun! You can help other people and it will help us help you too!
My friends call me Nader. My foes just run.
http://nad3r.minus.com/
I find 'em, I fix 'em.

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Cyrioz
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Joined: Sun Apr 28, 2013 5:51 am
Location: Switzerland

Re: Need Help: CPS 1700 spraying wildly

Postby Cyrioz » Wed Jul 09, 2014 3:12 pm

Thanks for your elaborated answer.

Yes, it is the plastic grid, not the mesh.

I had the idea to open up the firing valve to access the plastic grid from the inside. Wouldn't that be possible? Is sawing through the laminator the only option?

In the tutorial I linked in the first post (http://www.sscentral.org/repairs/spraying.html) the author puts a PVC tube inside the nozzle tube before glueing it together. Did I understand that correctly? Won't that affect the performance of the blaster?
I also like to idea to put some straws in it instead of the plastic grid.

Of course I'll take some pictures. It just might take some days until I can finally complete the repair.

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HBWW
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Re: Need Help: CPS 1700 spraying wildly

Postby HBWW » Wed Jul 09, 2014 8:46 pm

You should be able to open up the firing valve, but you'll want to have epoxy on hand in case it doesn't seal completely when reassembling. Whichever one is better for you depends on what you want to do. I'd probably go with opening the valve, so that any plastic pieces that could fall in won't be a problem.

Rebuilding the laminator yourself always carries some risk. I lost the outer screen (nozzle side) of a CPS 1200's, and the stream broke up more easily. Nozzle laminators are very temperamental as a whole, but unfortunately are also very important for the way the pull valves work.

You may be able to replace the screen too, using something from McMaster Carr. Unfortunately, I don't have a good part number that matches Larami's screen very closely at the moment. (The wire was a bit large on the screens I got.)

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Cyrioz
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Location: Switzerland

Re: Need Help: CPS 1700 spraying wildly

Postby Cyrioz » Sat Jul 26, 2014 3:27 pm

I finally found the time to repair it - and it worked! Thank you very much guys for your help, you're amazing!

Image
The CPS 1700 Internals, nothing special for experienced Super Soaker enthusiasts like me ^^

Image
Now the difficult part, never did this before. First I've loosened the screws before I used a knife to cut through the glue. In my case, there was no need for grinding, I just used a bit force on the knife and suddenly it went in at some place around the nozzle valve. After that I used two screwdrivers to pry it open carefully.

Image

Image

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First look on the nozzle laminator. Everything looking normally.

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But by touching it with the screwdriver it rotated easily! That was causing the problem with this unrealiable stream!

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Not exactly as described in this article (topic6557.html#p58623) there are two nozzle laminators, seperated with a short plastic tube inside the nozzle. I could even rotate both of the laminators with my tool, as you might recognize in this picture.

Image
As suggested I fixed the one which was more accessible to me with four drops of epoxy on four sides, after I dried everything with a hair-dryer. I used as less epoxy as possible, because I didn't want to jam the laminator. I figured if I fix the upper one, the lower laminator had not enough space to rotate anymore.

I forgot to take pictures of the reassembling, but there was not much worth mentioning.
After screwing the nozzle valve together, I put a thick streak of epoxy around it. Maybe this was a mistake and I should also have put some epoxy between the two parts, but this way I could open it up again more easily if anything should be broken again inside the valve.

Image
Now look at that thick stream! No leaking from the valve so far, the epoxy seems to hold it. But that weather... :-( This should be summer in Switzerland... :oo:

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soakinader
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Re: Solved: CPS 1700 spraying wildly

Postby soakinader » Sun Jul 27, 2014 6:04 pm

That's awesome! Good job fixing it.
I'm surprised that there is no rubber gasket inside the CPS 1700's firing chamber. Without one I guess that epoxy was somewhat necessary.
My friends call me Nader. My foes just run.
http://nad3r.minus.com/
I find 'em, I fix 'em.


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