Okay so today we're working on a three and a half ton Kubota excavator
the owner has decided to install a Tilt Hitch
which is a quick hitch and a tilt hitch, where they can quickly connect and disconnect
buckets and implements but with the added feature of the tilt hitch, what is not shown here
is you can also tilt buckets and implements to the left and to the right so because of that they
need an additional function to be able to tilt the hitch as well as connect and disconnect the hitch
so we've decided that we will install a six port diverter valve which we have
down in here so it takes the function or in this case the auxiliary function
and it divides it up into two functions so
this is the auxiliary function here
so we have a coupling and an isolator valve on this side of the dipper arm and we've got a
coupling and an isolator valve on this side and these are the (imaginary) hoses that you would connect if you
were running an auger or an earth drill whether you were running a tilt bucket or whether you
were running a rock breaker or a hammer so they they connect into here and these will supply oil
to the implements that you want to use. The added complication is that how do we actually operate
the tilt function so that you can actually tilt the auger or you can tilt the hammer
or you can actually tilt the bucket to the left and tilt to the right
so this is what a six-port diverter valve does
so we've taken the original
supply from the main valve
and fed them into
what they call port A1 and port A2 so these are the original lines coming in with the blue
cable ties. With this coil unenergized in other words you're not sending any
energy or power to this coil oil will go straight through the valve and come out
of B1 and B2 which is shown here in this lime green lime yellow colour cable ties. These two hoses
will then go to the tilt hitch. So when you want to operate the tilt function now automatically when
you hit this little toggle switch on the right joystick it'll operate the tilt hitch function so
left and right tilting the bucket to the left or the right so we
implement to the left or the right whether it's a rock breaker
or an Auger (Earth Drill)
When you actually want to use an implement you energize the coil
which is just a switch here
and when this is energized there are two things that happen the coil is energized which then
the coil is energized which then blocks
B1 and B2 so the tilt function is locked into whatever position you last used it at
and it opens and allows flow to C1 and C2 these are the pink little cable ties here
so now you've got flow going to your implements or your auxiliary function as before so the
auxiliary function is complicated because you can either have an Auger or you can have
a hammer function so when you're using an auger or an earth drill you want to be able to
go in both directions however when you want to use a rock breaker or a hammer
you can olny supply oil OR you should only supply oil in the one direction
so this is the original circuit before we installed the six port diverter valve and this is the modified circuit
after we installed the six port diverter valve so i'll describe and explain Prior how it was and
then after we installed the six-port diverter so the important thing to remember with this
auxiliary function here from this directional control valve is that included in
the hydraulic system or circuit is this Tee port diverter valve it's only the one valve but we've
shown it twice in two different positions so in this position here all three ports
are open and this is actually called one way and i'll explain why it's called one way
whereas in this position it's this valve is actually rotated 90 degrees so
you can transpose that valve over the top but this is how it will look and when it's
in this position it's actually called two-way which means the following and i'll explain so
if for example you energize the button on the joystick in one direction this moves the spool to
that direction and all of a sudden the pressure is coming through there so it's going into A
and if for example the implement that we've got attached to the hoses on the dipper arm
and the couplings on the dipper arm is an auger it's going to go into the auger the
auger is going to spin in one direction the spent oil is going to come out right
A means you should have it in "two way" so it should be in that position there so the oil
the oil coming out of the auger will go straight through that valve can't go that way it'll go down
into the B port which is this one here which means tank and that will go into tank all right ?
if you want to use a hammer or a rock breaker you have to rotate the valve into
what's called the "one way" position in one way means it the oil can only go one
way and that's back to tank all right so let's just explain what that means
if it's in this position and you're using the hammer, hammers can only take oil in one direction
they don't like oil in the opposite direction or they won't accept oil in the opposite direction
also the spent oil coming out of a hammer needs to go back to tank
as unresistant you know with little resistance as possible so we try and
bypass going through the valve and then back to tank and we bypass the valve we go straight
to tank with this Tee-port diverter so in this position it's called one way so what happens is
you energize in this direction if you energize in this direction that means
that P port comes through here goes into A goes into the hammer hammer does its job by
oscillating the internal piston comes out of there and then it's not going to go that way it's going
to find it much easier to go that way and quickly back to tank, so it's a shortcut back to tank, all
right? if accidentally you hit the toggle in the opposite direction you accidentally supply oil
when that lever when that directional control valve moves into that position
so all of a sudden P is now reversed so all of a sudden pressure is coming out of the
B port but in the one-way position you're not going to damage your hammer because the pressure is just
going to go back to tank so you can't damage your hammer if you forget to leave that valve
in that one-way position and then you connect the auger what you'll find is that the auger
will only rotate in the one direction and when you try and reverse the rotation you'll notice
it doesn't rotate because the oil is going back to tank, all right? so that's the original design
so whether you use an auger or whether you use a hammer or a rock breaker, now, moving across to here
we've now introduced a six-port diverter valve so it's got a little bit more complicated but we've
added another function and that's the purpose of the six sport diverter valve you can add functions
incidentally you can add layers and layers and layers of these six-port diverter valves so with the
one directional control valve you can operate one function or another function or another
function or another function you can continue to add functions if you don't have any more
directional control valves so in this case we've added this six port diverter valve to do
two functions the tilt hitch or to do an auxiliary function which is either an auger or a rock
breaker okay or even a tilt bucket if you like which is different to a tilt hitch now so normally
what we've done is you've got a coil here and when you leave the coil unenergized and you hit the
toggle switch and that moves into that position pressure will go in will come out of A going into A1
come out of B1 and go into the hitch and actually rotate the hitch in one direction
when you then energize and the return oil from the hitch will go through there
into B and out to tank from that line there if you then reverse the toggle and all of a sudden
you're reversing your flows P then comes out of B so then it goes into B which is A2 comes
out of B2 and the hitch operates in the opposite direction okay are you with me? hopefully yes! now
so under normal circumstances you have movement for your tilt hitch all right now tilt hitches
are great for buckets uh and when you're actually wanting to excavate the side of a hill for example
yeah that's the beauty of you can actually rotate most buckets are fixed on excavators
but with a tilt hitch you can actually move the bucket in any angle you want so you can actually
create a slope on a hill if you like so that's with the coil unenergized as soon
as you energize the coil two things happen, the first thing that happens is the tilt hitch ports
B2 and B1 are blocked so the hitch will stay locked in whatever position it was in all right
it will not move but you're then diverting oil out of C1 and C2 so all of a sudden you
have the same original thing repeated okay so all of a sudden you energize the coil so C1
depending on whether you have this in one way all three ports are open or two-way
only two ports are open you can either use the auger when it's in two-way or you can use a hammer
or rock break when it's in the one way all right so that you've replicated the original function
all right using the auxiliaries the only other thing that you need to install
on six port diverter valves is a case drain if your operating pressure goes over 200
bar which is about 3000 psi anything over 3000 psi and you must install
an additional case drain on the back of the spool so that it continues to shift normally
that's it really hopefully that makes sense
we'll go to the machine now and have a look and explain the different hoses.
So as with all our products if you need more information or you want to know where to
source one look in the description below the video. Originally before the modification
this hose that now disappears to the six-port diverter valve used
used to connect to this diverter valve here which is actually a T port diverter valve
and depending on whether you're using a hammer or whether you're using an auger
it depends on which way this valve is actually rotated
so in this position is what's called two-way so oil can come out of the two ports here and here
where the two blue cable ties are
and you can actually reverse the flow so like when you're using an auger and you want to
screw into the earth or you want to unscrew and screw back out of the earth all right
so this is actually a T-port diverter valve when you actually rotate it to this position
all ports are open so that port is open which goes to tank
that port is open which also goes to tank and this port is also open which goes to tank
so this is actually used when you're actually using a hammer or a rock breaker where if you
only want the hammer to actually operate with flow in one direction only and if you accidentally
press the flow in the reverse direction the flow doesn't actually reverse go in
the reverse direction into the hammer which can aggravate the hammer it actually returns to tank
rather than going back to the hammer so the other advantage of this T-port is that any
oil returning from the hammer after it's done its work has a much easier and less torturous
path with a lot less back pressure to go back to tank it doesn't actually have to go
back to tank via the valve here it just returns straight to tank so that's the function of
this diverter valve here it's actually a T-port diverter valve all right in one
direction all three ports are open and in one in the other location only two ports are open
and that one is blocked hopefully that made some sense and uh you learned something today this was
a little bit of a challenge for us to work out but we got there in the end, I hope you learned
something uh as usual if you like what you saw give us a like give us a thumbs up if you think
of subscribing please consider subscribing and uh want to see something else something you didn't
we didn't do quite right something that you didn't like comment ask questions bye for now
you