Hydraulic connections for 4 in 1 and stump grinder

[PowerTracManiac]

Scored a 4 in1 bucket and stump grinder used for my PT1460.
Don't understand how the connections work.
The stump grinder has huge connectors on it. Seems they would fit on the outside large hose connections of the PT1460.

The 4 in 1 bucket has small connectors on it? They appear to be the same size as the fittings for the hydraulic quick clamp?
Do I remove the connectors from the hydraulic quick clamp and use those connectors for the 4 in1 bucket after the bucket is on? Or do I need adapters that go from small to huge connections and then put it on the the big connectors. Photos attached.
The previous owner could have done something with this but the guy I bought from said he didn't know anything about them.

Any help would be appreciated.
Picture 1 far right large connector on machine and right quick connects on machine
Picture 2 far left 2 large connectors on machine and left quick connect on machine
Picture 3 large connectors on the stump grinder
Picture 4 comparison of quick attach connector size on machine on right to connectors on the 4 in 1 bucket hoses

 

[Industrial Toys]

I'm sure a power trac expert can help you.

But how many controls do you have? And what kind?

How many circuits on the stump grinder? Just one for the motor and the machine does the movement, up/down, right/left?


That would negate much of the purpose of having a hydraulic tool change if you need to unhook it to hook up your hydraulic tool.

 

[PowerTracManiac]

I do know that the system works with the hydraulic quick connect for connecting the tool itself.
Then, if the tool needs hydraulic for a function like grappling, spinning the blade on the stump grinder, etc. the additional hoses for the tool have to be manually connected. No big deal with quick connects but you do have to get out of the machine to do that.

 

[Industrial Toys]

So what are the BIG connectors for? Do you have a high flow circuit? Is it only a hyd motor circuit or is it also controlled for cylinder use?

I had one AUX circuit out front to my loader. I installed an electric valve, and used the one position for a hydraulic tool change coupler. Then still have the other side of the electric valve for tools. Works well.

 

[m5040]

"The 4 in 1 bucket has small connectors on it? They appear to be the same size as the fittings for the hydraulic quick clamp?" The hydraulic quick connect on the tractor (the outside small fittings) are used for items like the 4 in 1 bucket cylinders. And you would first connect the attachment and lock in place, then disconnect the 2 small lines and connect in your small 4 in 1 bucket hoses. Then the same lever that you used to lock and unlock attachments now would open and close your 4 in 1 bucket. You could reverse the hoses if the lever direction didn't match what the attachment was doing.

 

[m5040]

The "huge connections" as you call them are for running an attachment with a low flow hydraulic motor. That circuit is controlled by the switch on the dash marked PTO. It would be used to spin the cutter blade on your stump cutter if it was a low flow motor. If the blade spun the wrong direction, you would reverse those. Keep them all clean when changing over. Dirt in the hydraulics is not good.

 

[MossRoad]

So it's like this.

- The Quick Attach is operated by your AUX PTO.
- You AUX PTO is the 3rd spool on the FEL valve bank.
- On a PT425, that 3rd spool is the lever by the operator's right knee under the FEL joystick. I don't know where it is on your machine, so am guessing it's the same?

The AUX PTO is for operating cylinders, not motors. So, for example, your grapple bucket. You'd drive up to it, pick it up with the Quick Attach, and lock it in with the AUX PTO lever. Then you'd set it down, set your parking brake, undo your seat belt, get off the machine, disconnect the Quick Attach hoses from the AUX PTO connections and let them hang. Then you'd connect your grapple bucket hoses to the AUX PTO connections.

Now get back on the machine and operate the grapple with the Quick Attach lever.

That's how it works.

For the stump grinder, that has a hydraulic motor. Hydraulic motors are run off of the MAIN PTO. Those are the larger hoses on your FEL arms and operated on a PT425 by an electric switch on the dash. So I'm gonna again assume that's the same way on your machine.

So again, you'd drive up to the stump grinder, pick it up with the Quick Attach, use the AUX PTO lever to lock the Quick Attach into place, put the stump grinder down, set your parking brake, take off your seat belt, get off the machine and connect the two large hoses from the stump grinder to the two large MAIN PTO connections on you FEL arms. Then get back on the machine and buckle up.

When you start a hydraulic motor on a PT of any size, you never want your engine running at high RPMs. So throttle the machine back to idle, lift the blade off the ground a bit, make sure all is clear, etc.... and then you can flip the electric MAIN PTO switch on your dash and the hydraulic motor on the stump grinder will start spinning. Then you can get into position near your stump, throttle up the engine to full RPMs and start grinding slowly.

Same thing would apply to a brush cutter. Don't turn on the MAIN PTO switch unless the engine is throttled down. Once it kicks on, then throttle up slowly to full RPMs and then lower the cutter down onto it's wheels and start mowing.

Hope that helps.

 

[MossRoad]

Unless the previous owner changed things, PT puts identical sex connectors on the AUX PTO, and opposite sex connectors on the MAIN PTO.

The reasoning is that the AUX PTO is to only be used for hydraulic cylinders, and therefore, it doesn't matter which way they are hooked up, except the operator gets confused if they hook the hoses up opposite.

The MAIN PTO is only to be used for hydraulic motors (high flow, low flow, doesn't matter, all hydraulic motors). Therefore, it's important to only have the motors turn in the proper direction. (even if they are reversible motors, you don't want them spinning in the wrong direction). So they put opposite sex connector on the MAIN PTO so that the implement is always connected with the motor direction the same each time.

 

[MossRoad]

And,of course, the MAIN and AUX PTO's are of different sizes. You can't hook things up to the wrong PTO this way. Also, the flow of the AUX PTO is only about 1/2 of what the flow of the MAIN PTO is on a PT425. Don't know what it is on your machine, but it's considerably less GPM (Gallons Per Minute) than the MAIN PTO.

The lower flow of the AUX PTO insures that you can't operate hydraulic cylinders too fast. High flow is not needed on the cylinders.

High flow IS needed on the hydraulic motors.

On my 60" finish mower, the hydraulic motor is very small displacement. Therefore, my 8 GPM flow from my MAIN PTO spins it very fast, because it's forcing all that flow through a very small space.

On my 48" brush cutter, the hydraulic motor is about 1/3 the displacement of my mower motor. Therefore, the same 8GPM flow from my main PTO spins it slower than the finish mower. But it has a lot more force behind it.

The motor on PT's winch is HUGE displacement. Therefore, the same GPM turns it only about 120RPMs. But it has tremendous force.

Think of hydraulic motor displacement as gearing.

 

[MossRoad]

So for example, my power angle snow plow.

I drive up, pick it up with the quick attach, lock it in with the AUX PTO lever at my knee, set it down, set my parking brake, get off the machine, disconnect the two quick attach hoses, connect the two power angle hoses from the plow, get back on the machine and off I go. Takes about 30-40 seconds. I use my AUX PTO lever to adjust the left/right angle of the plow, the dump/curl function of the FEL joystick to control the forward/backward angle of the face of the blade as well as the height off the ground because I have gauge wheels behind the blade, and the raise/lower function of the FEL joystick to lift the plow up as needed to stack snow, clear objects, or tram around without plowing. I usually leave it in float when plowing forward. I will put down pressure on it when back dragging away from the garage door, or scraping ice off the driveway. Being able to lift a snowplow to full FEL height is fantastic. Way better than a bucket for clearing and stacking snow.