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My new shock pump layout (not finished).

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My new shock pump layout (not finished).

Unread postAuthor: Sticky_Tape » Sat Jun 28, 2008 9:50 am

Hello I am building a new shock pump my other pump is broken the check keeps poping. I am going to use the elbow
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100-0004_IMG.JPG
Put together not soldered.
100-0002_IMG.JPG
Exsploded fitting view.
Last edited by Sticky_Tape on Mon Jun 30, 2008 11:46 am, edited 2 times in total.
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http://www.spudfiles.com/forums/high-pr ... 12803.html
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Unread postAuthor: Gippeto » Sat Jun 28, 2008 10:14 am

Best of luck with your new pump, I'm sure it'll be better than what you can buy @ Canuk Tire. :)

My .02;

Using a schrader will simplify construction somewhat, but be aware that it takes about 70psi to crack it open. This means that you will have to pump 370psi worth of effort to get 300psi into something. :(

Some method to stabilize your pump (the bottom will try to slide away from you) while pumping is going to be worthwhile.

The union is probably a good idea if you use the schrader. It should seal fine. If it leaks, cut a "gasket" from any hdpe (milk) jug. Awesome stuff.
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Unread postAuthor: Sticky_Tape » Sat Jun 28, 2008 10:22 am

Thanks Gipeto about the milk jug part I never knew. I don't know what I will use for the pump base, piece of wood?
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You can tell how awesome a cannon is by the pressure used.
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Unread postAuthor: Gippeto » Sat Jun 28, 2008 10:47 am

Sure, wood will work.

Make an upside down "T" shape and secure the pump to it.

You could use U-bolts to secure a piece of steel pipe to the upright, and run your pump cylinder through that. Wrap the cylinder with something (duct tape?) to muffle noise and cushion the cylinder.

Then just screw on a couple smaller pieces of wood at the base to keep the elbow from turning.
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Unread postAuthor: Sticky_Tape » Sat Jun 28, 2008 11:35 am

Awesome thanks.
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Unread postAuthor: kablooie » Sat Jun 28, 2008 11:40 am

Would this fitting work for you as the base? I'm using one on my current gun and it popped into my mind.
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copper-fitting-dropear-elbow.jpg
this has mounting points that you could use to mount the pump. You can also get a slip-slip one, but I am not sure that is a common in hardware stores.
copper-fitting-dropear-elbow.jpg (11.35 KiB) Viewed 656 times
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Unread postAuthor: Carlman » Sat Jun 28, 2008 11:51 am

they have been used in other pumps they work great
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Unread postAuthor: Sticky_Tape » Sat Jun 28, 2008 12:22 pm

DAMN I saw one of those and I was thinking not about buying it but I was wondering what it was for! Should have bought it.
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You can tell how awesome a cannon is by the pressure used.
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Unread postAuthor: Sticky_Tape » Sat Jun 28, 2008 8:43 pm

Update: I think I wan't to use a fitting similar to what kablooie suggested a slip slip 3/4''-1/2'' one it will make construction easier. I think I saw them before so next time I go to Canuk Tire I will look but if they olny have slip slip 3/4''-3/4'' I will just use the wall reducer seen in the top pics.
Edit: sorry about the double post I went strait to the post reply button when I saw it at the top of the replies. Didn't know that I was the last person that replied.
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Set up.
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
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Unread postAuthor: psycix » Sun Jun 29, 2008 4:14 am

That diagram looks good, but I I understand correctly, the schrader is mounted INSIDE the union above the elbow?
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Unread postAuthor: Sticky_Tape » Sun Jun 29, 2008 10:27 am

Yes with epoxy but the project is on hold.
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Unread postAuthor: VH_man » Sun Jun 29, 2008 8:28 pm

BTW......

i reccomend making sure that theres somethign holding your schrader in from the pressure side.....

meaning just use a schrader with the rubber on it...

i had my schrader pop out of the epoxy today...... i got hit in the chest with my pump handle......... left a mark........

ive switched to using a bouncy ball and a 1/4 inch fitting. you dont even need a spring......
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Unread postAuthor: THUNDERLORD » Sun Jun 29, 2008 9:48 pm

Nobody else mentioned it, but that hose is definately rated under about 200psi. (I have the same hose but forget the exact rating).

I was looking at swivel type nipple to use rather than a hose at all for this reason.

Or can this type hose hold that much more than the rating?

BTW, it's kind of fun when they blow out. But also annoying.
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Unread postAuthor: Sticky_Tape » Mon Jun 30, 2008 11:43 am

Well the project is running now and I am not using a shrader for a check I am going to use a check like Gipeto's but a little different.
1# The washer used in the check is a 5/16'' one fits perfect in the 3/4'' male adapter without grinding.
2# You do not do any mods on the bolt the bolt is 3/8''x2'' it fits perfectly inside of the washer.
3# The spring will be above the washer and below the head on the bolt.

Don't look at my original post it is screwed up and won't let me change it.
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Attachments
100-0008_IMG.JPG
The setup without spring.
You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
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Unread postAuthor: Gippeto » Mon Jun 30, 2008 1:33 pm

That's pretty good thinking S-T. :)

It will add to the dead space in the pump, but shouldn't really effect the performance much.

Your check valve will never "blow out" either, which is a bonus. (for you, not your dentist :D )
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