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 These are the things which are to be needed to built a prototype hydraulics:
1- Syringes (2)
2- Drip case OR pipes of same size as that of cringes nozzle
3- Any liquid (i took water)
4- Glue
 

Step 1: Adjusting Them Together

 First take the pipe and check, is a rubber strip as the same size of pipe and that of the head of the syringe , if not then take a small strip of rubber(elastic pic 3) and attach it to the both sides of the pipe. After doing it then connect it with one of the heads of any of two syringes. 
Note:- the connection of rubber strip with the pipe and head of the cringe should be very strong. 

Step 2: Filling of the Liquid in the Pipe!!!!

 This is an important and a lil bit tricky step. You have to fill the pipe with any liquid(i used water) in such a way that there is no bubble in the pipe. so the best way for it is that you pull out the back of the syringe.
after it then attach the other syringe with it on the other end firmly. after it pull out its back too. now keep the both syringes in your hand at same level and pour water at the back of the syringe. take a close look see that there should be no bubble in it. and pipe should be full of water. then set the syringe in such a way that one of the syringe is full(such that water is falling out of it) and the other one is completely empty. put the back of the syringe back on to it at press it slowly and slowly to its end.
U WILL BE SEEING THAT ONE SYRINGE IS FULLY PRESSED AND THE PIPE IS FULL OF WATER.THIS SHOWS THAT U HAVE DONE THE HARDEST PART.

Step 3: The Final Step

now as u have done according to the instructions, ow u just have to put the back(lever or piston) of the syringe back onto it. so it starts to perform your desired function.
NOTE:-
I used water but u can use any other liquid for it and if u use water please keep in mind that water evaporates so please do not Glue both of the heads of the syringes(Glue down any one ).
the process of refilling it after a long use will be same as process described in step 2.



Where did u get the pipe
<p>i dont like the pro thingi u know not every one has facility to become a pro</p>
Thats sick
&nbsp;thankx, bro's<br /> it was my first instructables so thats why i couldn't put much into it but its really a good one, whereas bro Jeff-o i think that my one is powerful because i used four of these in my rc car and it weight like 4 kgs,,,,,,,its enough for this small prototype..... :-)
I used this method in junior high to make mechanical arms and other stuff.&nbsp; It works well, though the pistons aren't too powerful and they move slowly.&nbsp; Good to see it finally documented here.<br />
I tried it with Lego pneumatics - <em>much</em> too slow - narrow bore connections.<br /> <br /> L<br />
It's years since I played with this sort of thing. I'm sure I managed to weld syringed tip to tip. I like it.<br /> <br /> L<br />

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