Deere 250G lc Aux hammer/breaker one-way HUDco kit no flow!!

So I got dragged into an issue with little to no help from local dealer. Client was sold a HudCo one way aux hammer kit for a hammer the client went and bought from somewhere else without realizing he didnt have the aux as a factory installed option before making the purchase. Now he has a nice GH12 hammer connected and got a kit from Deere however its from an outside vendor (hudco). Its been installed according to instructions. pilot pressures are good, relief pressures are good, but there is not enought flow because there isnt..or i should say im not seeing anything actually calling for flow once pressing the switch and opening the aux circuit. hammer will hit but very very slowly. I can watch the monitor and pump flow is not increasing. "breaker switch" remains off but i think that is because its a seperate control valve ran by its own power supply and not through the machines brain. I guess my question would be if anyone has a good hydraulic schematic for this deere/hitachi frankenstein that would show me which port from the pilot ontrol valve would be triggering the pumps to allow flow through the main aux lines.

Serial number of the machine, please?

Why didn't the dealer sell a Deere kit?

Anyway, it might be that the auxiliaries have not been turned on since that machine was sold without boom plumbing.

Since I don't know the particulars of that kit without seeing the instructions, some basic things to check are:
1. Is the auxiliary handle turned on with the switch below the right arm rest? (see picture below)
2. Has the breaker 1 mode been selected in the monitor? If so, post a picture of the next screen after selecting the breaker 1 mode.
3. Has the kit been flow tested and adjusted to match the breaker specs before installing the breaker?

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This hudco kit comes with its own electric pedal to operate the kits own solenoid I’ll attach the photos

After selecting breaker 1 or 2. The screen goes right to the main screen showing the hammer icon

In the monitor screen I can see breaker switch not activated and I don’t see target pump flow rate coming up any higher than 55 liters or so (I need 58 gpm).

I don’t have a flow meter with me. I won’t be able to have one here until next weekend but where would I even begin to adjust it where it seems it’s not even being called for. It’s obvious I’m not well versed in this. But unfortunately neither is the dealer without having to bring the machine to them. I guess the guys at the shop refused to want to help the road guy over the phone

I asked myself also why the John Deere kit wasn’t sold instead of this one. They said it’s because this machine was during Deere/hitachi so the parts side is strange because of proprietary rights. Something along those lines.

Third screen shot is what I wanted to see. They do not use a breaker relief. It should be set for attachment relief, but that will not affect your situation, unless your machine has an electronic circuit relief valve.

I take it that HCT solenoid valve is a one way kit?

Check your messages for one way flow installation instructions from Deere so you can compare the kit's plumbing.

I can't find such a kit by searching HCT or Hudco...

That solenoid block looks like one I have on an ancient excavator. All it does is divert pressure from a normal circuit (in my case the swing circuit valve) to the breaker. The simple joystick button energizes the solenoid to feed pressure to the hammer instead of the swing circuit.

Perhaps yours is set up in a similar fashion and the machine would feed it pressure if you use your joystick to command whatever function your solenoid is tied into.

My experience is with pre electronic machines so ignore if this info is out of date.
All the excavators I've been involved with required both pumps to run the hammer through a priority valve. The reason for the slow stroking may be of insufficient oil flow if only one pump is used.

Is your control pressure for your pump going up when you activate the function? You can watch both pumps control pressure in the monitor. If you're not sure what it should be then you can compare it with another function thats working. If its not then you can confirm by bringing it up by bottoming another function and then your hammer should work. If i recall the pumps on that machine are stroked entirely by your pilot plumbing through the pilot manifold, so your pilot plumbing needs to be correct from your diverter valve into and out of the pilot manifold and to your spool cap. Theres also a port on your pilot manifold with a drain hose on it. The hose needs to come off and the port needs to be capped. If the hose is left on it'll vent your pump control pressure to tank and your pump wont stroke up. I don't remember the port number off the top of my head but im sure someone on here can tell you what it is.

Johhnycanuck said:

If i recall the pumps on that machine are stroked entirely by your pilot plumbing through the pilot manifold, so

Click to expand...

That is why I sent him the Deere instructions. It will show what pilot hoses should go where and which hose to cap, etc, for running a hammer. Hopefully the instructions will help him as compared to how his HCT kit is plumbed.

davejo said:

That solenoid block looks like one I have on an ancient excavator.

Click to expand...

Actually, that is not much different than the Deere one-way solenoid kit install.

The Deere instructions were just what i needed. The HUDCO kit instructions just has photos from 2 separate machines with differences between them. They just have the pictures with squiggle lines showing where to put hoses. Wouldn't you know on the signal manifold I needed to be hooked to M! and not N. They put the "m" in a square, but the spacing took the better half of the "m", and it looked like an N. honestly entirely my mistake for not having a better look but reading the instructions in the field vs indoors makes a big difference Those Deere instructions were great, and I'm going to be calling the dealer and asking why this kit wasn't an option to begin with. I know this client would have preferred OEM and price isn't a deterrent for him. So why the HUDCO kit that I believe took 12 weeks to come in.

Thank you guys so very much for the help. And a BIG THANK YOU to MG, you're a lifesaver!