My new shock pump layout (not finished).

[Sticky_Tape]

Hello I am building a new shock pump my other pump is broken the check keeps poping. I am going to use the elbow

[Gippeto]

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.

[Sticky_Tape]

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?

[Gippeto]

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.

[Sticky_Tape]

Awesome thanks.

[kablooie]

Would this fitting work for you as the base? I'm using one on my current gun and it popped into my mind.

[Carlman]

they have been used in other pumps they work great

[Sticky_Tape]

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.

[Sticky_Tape]

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.

[psycix]

That diagram looks good, but I I understand correctly, the schrader is mounted INSIDE the union above the elbow?

[Sticky_Tape]

Yes with epoxy but the project is on hold.

[VH_man]

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......

[THUNDERLORD]

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.

[Sticky_Tape]

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.

[Gippeto]

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 )