hammer circut to 2way hydraulic conversion Q's

I have a 06 315CL that has one way hydraulics on it and a manual thumb.....well you can figure out what i am wanting to do but! what is the cheapest way to convert one way to 2way aux's? I am thinking of maybe a electric flow diverter or something rather than buying a new valve body from CaT.

I will probably need a new joystick or i could get by with putting a on-off-on momentary switch on the console would be o.k. too. anything has got to be better than fighting that stiff link.

There will have to be some welding and fabricating involved too but that is easy stuff.

If anyone knows of any aftermarket/cheap ideas lets hear them.

Pj

I'd get an electrically operated 6/2 valve with 3/4" ports, that'll do the job just fine and are cheap.
Around here they can be found for 150$

All you need is a simple switch and perhaps a relay if your switch can't handle the amperage.

not sure that 3/4 will flow enough for a hammer? and in order to flow through it i would have to flick the switch and then step on the pedal (current aux activation) and then flip the switch the other way and step on pedal to flow the other way is that right or am i thinking of something different?

Pj

I'd suggest you connect the thumb hydraulics with quick connects at the connectors on the stick for the hammer circuit, that way it can be disconnected easily if you want to run a hammer for a while.
Mount the valve on the stick as well.
Then you only have to worry about the flow required for the thumb through the extra valve.

Don't you have a switch for activating the aux too?

i just had my aux hammer circuit switched to 2 way on my 312. i was just going to uses an electronic switching vlave and do it the way your talking about. then i found out that the port and vlave for 2 way is already built into the machine (guess its cheaper for cat to make all the machines with aux) all i needed to do was add the releief valves, the pilot lines and a 2 way switch (replace the one way pedal) and plumb it all together. my system has a manual cross over valve that sends fluid back to the tank for the hammer if i need it. i think the whole thing cost about 800$ in parts. and its as good as the factory set up. the expensive part were the relief valves (500$)
talk to a hydraulic shop they can help you out alot.

nope, just a pedal on the floor.

one time i seen a machine that had a aftermarket joystick on it with 2way's.....any idea what company makes such a thing and what it cost?

Pj

i have a 2 way on the joystick. my local hydraulic shop got it for me... (150$) ill see if i can find the recipt to see who made it

powerjoke,
you should consider looking at what JPCobra105 is telling you. A lot of excavators come from the factory with a single acting auxiliary circuit consisting of a one way pilot operated foot pedal operating the output on the auxiliary valve section of the main control valve assembly. In a lot of cases, the aux valve section is actually a four way valve already, they just use the A output port to feed the aux circuit then send the other aux pipe back to tank, and they simply put a plug in the B output port on the control valve. You simply remove the plug, connect the hose on the return pipe to the B port of the control valve, install the required port relief for the B port (not installed from factory because port was plugged). Then you just replace the foot pedal with a double acting pedal and run another pilot hose from the pedal to the B side of the control valve. You could probably find a used pedal from a dismantled excavator from someone at Machinery Trader or Iron Peddlers. Then you'll pretty much have a factory setup.

that's exactly the info i was looking for . i'll check monday to see if everything is there.

And JP if you could figure out what handle you have, that would really make a classA job out of it

Pj

You can get your components from Hyd Circuit Technology.

http://hctkits.com/

The relief valves from Cat are expensive. The first thing you have to do is make sure your aux control valve is in fact a four way valve with one port blocked like what JPCobra described.

powerjoke said:

nope, just a pedal on the floor.

one time i seen a machine that had a aftermarket joystick on it with 2way's.....any idea what company makes such a thing and what it cost?

Pj

Click to expand...

Summit hydraulics makes them