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Hammer/Breaker single acting circuit into Double acting 2 way flow conversion?

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you might find theres a l type valve in the return line to the tank/valve chest a hammer needs minimum back pressure to run at its best so they usually fit a diverter valve on the return so it passes through this then the filter on route to the tank

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How's it going?


We have the same excavator and have recently purchased a hydraulic log grab and having trouble getting it to work properly.  Did you come up with a solution for this please?


Thank you, in advance.



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Hi Justin
You should have no problem operating open close for your grab with the aux circuit via the thumb slider on the right joystick. Unless you have a tilt hitch and are all ready using it, which in that case simply removing the tilt hitch will allow you to connect the grab to the auxiliaries. For my rotator function I have had the hammer pipe converted to a Double Acting circuit with switchable high flow, there is now a valve at the bottom of the boom that needs to be turned to select DA or Single Acting. I also added a 6 port diverter valve on the auxiliaries, 2 in 4 out, I have not used that yet but it will give me proportional control of the rotator by depressing the trigger on the right joystick to activate the diverter valve and the thumb rocker switch to rotate. I did this in anticipation of installing a chainsaw cassette that will run off the hammer piping. I can take some photos tomorrow.

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