L39 Backhoe off, PTO implement needs hydraulics

[jmanatee2]

I have a 2006 L39 TLB I am looking to get a woods TSG50 PTO stump grinder.

Because the L39 has 3 lines (2 pressure, 1 return), how do I power the hydraulics for the stump grinder.

There are 2 directional valve levers, Is one for one pressure line and one for the other?

Do I combine the two pressure line to create one?

Do I have to add a power beyond $$$

Confused. anyone have any ideas?

 

[CHDinCT]

You probably should wait for someone more familiar with your L39, but knowing how my BH is set up, you probably have one pressure line into the backhoe and one pressure line that feeds downstream hydraulics (like the 3PH) when the BH is not in use. Another words, the pressure flows into the BH valve and out to the 3PH, for example. The third line, like you said, is the tank return. When the BH valve is in use, the oil is sent from the valve to the tank so no pressure is sent downstream.

For sure, you would need to connect the BH pressure in line to the in port on your stump grinder. If the stump grinder has a power beyond port (PB sometimes marked on the valve) then the pressure out line would connect there, and the tank return line connects to the T or return port on the SG valve. However, my guess is the SG only has two port - one for pressure in and one for tank return - similar to a log splitter for example. In that case, I would connect the SG out or return port to the tank return line, but you may not have any 3PH functionality that way.

I would set it up that way and see if you loose the 3PH or loader functions with the SG valve plumbed to the tank return first. If you do loose one or more functions, then you could connect the SG out/return/tank line (however it's labeled) to the BH pressure out port so you'd have full pressure to the 3PH, etc. when the SG is not in use.

 

[Stonehaller]

I use the swing pump on my L39 for rear remotes when the backhoe is off. The swing pump is the smaller pressure line. Use that with the return line. The directional lever on the left is the swing pump. Only push that one in when you have your remote valves connected so that you do not dead the swing pump.

The larger pressure port is the main hydraulics. You can use that if you need higher flow, but the three point lift will not operate. I do use that one for my three point log splitter, but when I need to change the lift height I either have to disconnect the pressure port and push in the directional lever, or push in the directional lever in and then bungee the splitter valve so the cylinder extends. With the directional lever pushed in, oil is routed to both the three point and the quick disconnect. No pressure will build with splitter valve centered has it dumps all the oil to tank. With the splitter valve bungeed open, pressure will be available to the three point when splitter cylinder bottoms out.

 

[jmanatee2]

Awesome, Thank you....

I use the swing pump on my L39 for rear remotes when the backhoe is off. The swing pump is the smaller pressure line. Use that with the return line. The directional lever on the left is the swing pump. Only push that one in when you have your remote valves connected so that you do not dead the swing pump.

The larger pressure port is the main hydraulics. You can use that if you need higher flow, but the three point lift will not operate. I do use that one for my three point log splitter, but when I need to change the lift height I either have to disconnect the pressure port and push in the directional lever, or push in the directional lever in and then bungee the splitter valve so the cylinder extends. With the directional lever pushed in, oil is routed to both the three point and the quick disconnect. No pressure will build with splitter valve centered has it dumps all the oil to tank. With the splitter valve bungeed open, pressure will be available to the three point when splitter cylinder bottoms out.

 

[Stonehaller]

Awesome, Thank you....

You are most welcome. The L39 is a great little tractor. You B26, L45, and L59 owners can do the same thing. They all have backhoe swing pumps that are separate from the main hydraulic pump.

 

[lhansman]

I don't believe the B26 has a separate swing pump - only the L39 and up have a separate swing pump.

 

[dfkrug]

I don't believe the B26 has a separate swing pump - only the L39 and up have a
separate swing pump.

Yeah, that's right. The B26 was a nice upgrade to the B21, but still only one pump. Higher pressure, more
engine power, etc.

All the Kubota TLBs offer a factory AUX valve, too.

 

[avc8130]

I use the swing pump on my L39 for rear remotes when the backhoe is off. The swing pump is the smaller pressure line. Use that with the return line. The directional lever on the left is the swing pump. Only push that one in when you have your remote valves connected so that you do not dead the swing pump.

The larger pressure port is the main hydraulics. You can use that if you need higher flow, but the three point lift will not operate. I do use that one for my three point log splitter, but when I need to change the lift height I either have to disconnect the pressure port and push in the directional lever, or push in the directional lever in and then bungee the splitter valve so the cylinder extends. With the directional lever pushed in, oil is routed to both the three point and the quick disconnect. No pressure will build with splitter valve centered has it dumps all the oil to tank. With the splitter valve bungeed open, pressure will be available to the three point when splitter cylinder bottoms out.

That's a great idea! Do you have any pics of your setup?
ac

 

[J_J]

Just find a pressure line and feed it to the back to power your stump grinder.

You probably have a hyd block that you can run a hose to the back.

So you have a single valve or a double valve setup on the stump grinder?

You may have one pressure line to the stump grinder and a return line.

If your stump grinder has three lines, that means that your stump grinder has a PB port and this port would run back to the tractor to continue the flow, probably to a set of remotes or just the 3pt.

The hyd should work correctly as long as you keep everything in series.

The return from the Stump Grinder could go directly to the fill cap.

 

[Stonehaller]

That's a great idea! Do you have any pics of your setup?
ac

Here are a couple of shots of my remote valve. I take the remote valve off when the backhoe is mounted. I used a couple of existing holes in the roll bar to mount the valve. Since I currently have the backhoe on, I set the remote valve in place so you could see. Note that the supply and return lines for the remote valve have mating quick disconnects for the swing pump and return line ports on the tractor. The valve is larger than necessary, but it is one I had. Likewise with the fittings for quick disconnects on the valve. They are a little ugly, but I used what I had.

If you want to use the remotes with the backhoe, then get a valve with a power beyond port and connect the swing supply line from the backhoe to the power beyond port. You would need a tee in the return line to connect the return line from the valve. You would also have to connect the power beyond port to the return to use the remotes without the backhoe.