Kubota KX015-4 Auxiliary Flow & Return Change Valve

[adamr7747]

Hi All,

I have a Kubota KX015-4 and am trying to work out a couple of things relating to using my hydraulic breaker.

1) What position should the "Return change valve for direct return flow" be in? The manual describes that it should be in the one-way setting for use with a breaker, but not which orientation that is. I can't see any meaningful markings on the actual valve.

2) How do I set the flow rate for the auxiliary circuit? The manual describes a sequence of button presses on the console, but that shows using 3 buttons, but I only have 2!

(And, for that matter is there a way to know what the flow rate should be for an Atlas Copco XT70 breaker?)

Cheers,
Adam

 

[doobin]

Hi All,

I have a Kubota KX015-4 and am trying to work out a couple of things relating to using my hydraulic breaker.

1) What position should the "Return change valve for direct return flow" be in? The manual describes that it should be in the one-way setting for use with a breaker, but not which orientation that is. I can't see any meaningful markings on the actual valve.
View attachment 82173

2) How do I set the flow rate for the auxiliary circuit? The manual describes a sequence of button presses on the console, but that shows using 3 buttons, but I only have 2!
View attachment 82174
(And, for that matter is there a way to know what the flow rate should be for an Atlas Copco XT70 breaker?)

Cheers,
Adam

Yours might have only full flow, no adjustment. Generally a breaker should be run on full flow anyhow unless it’s too small for the machine. Can’t see any specs online other than ‘max hydraulic input 18kw’ which suggests it’ll be fine/possibly slightly oversized on your machine.

For the double vs single, just try the aux hydraulics with nothing plugged in. Double acting will load the engine up when you push the pedal or buttons both ways. Single acting will only work one way. Then if nothing happens when you plug the breaker in on single acting, switch the pipes around as there may also be a one way valve in it somewhere.

 

[adamr7747]

Brilliant, thanks. That sounds likely about the full flow. I tried out the lever both ways, as you suggest, and the single acting is with the lever up.