L47 TLB Kubota third function wiring

[Joisey]

My tractor has the dealer installed Kubota 3rd function setup and the TL1300V front loader. What I am looking for is the wiring diagram for the third function valve solenoids. I have a Kubota repair manual, but it does not include the 3rd function valve setup.

What I am ultimately trying do do is find the wiring colors that go to the two solenoids on the 3rd function valve. I have traced the wires from the switch on the loader control lever and discovered that there are five wires, all solid color. yellow, red, green, blue and brown. By what I've found with other Kubota tractors, there are three wires to each solenoid, two ground and one hot.

The way my tractor is built, it is almost impossible to get to the solenoids or the control wires to determine which set of 3 wires go to which solenoid, if indeed each solenoid on my tractor used three wires.

I looked all over the internet and there is no wiring diagram for the Kubota 3rd function valve. I guess I could call Messicks in Mt. Joy, PA, but I doubt they will part with a wiring diagram.

Any help that you can give would be greatly appreciated. Thank you in advance.

 

[6869704x4]

I wonder if L45 would be the same

 

[Joisey]

I wonder if L45 would be the same

If the tractor has the dual solenoid setup like mine, I'll give it a try. I recall seeing somewhere that Kubota used the brown wire the positive wire.

 

[mikester]

What are you trying to do? If you simply want to actuate the solenoids why not use the existing control wire circuit from the joystick?

 

[Joisey]

What are you trying to do? If you simply want to actuate the solenoids why not use the existing control wire circuit from the joystick?

There is an intermittent open circuit when I use the switch in one direction. It is pressing the rocker switch on the outboard (right) side. The switch can be taken apart, unless it is glued AND has those retainers like wire connectors on the tractor. I'm trying to leave that as a last resort. If I break that switch and can find no replacement, then I have to shell out $500 for a new control head with the buttons.

I'm trying to locate if the problem is in the switch, the solenoid, or somewhere in the wiring in-between. If the solenoids were accessible I would pull the plug from each and determine which side has a power problem, if if no power problem, which solenoid to remove and replace.

I have seen the wiring loom from the joystick to the solenoids on Messicks parts page, but no idea where the multiple plugs on the loom go to, which may also cause the intermittent loss of power. I was hoping to see the wire colors going to each solenoid plug, which would help me tracing the wire, which is well concealed on my tractor.

 

[6869704x4]

Late

 

[Joisey]

Late
View attachment 174169

Thank you for the reply, and no problem with it being late. I discovered thru a lot of physical searching that my problem was a wire connector in the harness from the joystick to the solenoids wasn't completely connected, that is the retainer that holds the two pieces of the connector together never snapped in place, which caused my intermittent contact problem.

I also discovered in my searching that you can't take the foot pan off of an L47 to actually see all of the wires without taking the roll cage and rear fenders off first.

Your wiring diagram is similar to my setup in that there are 2 solenoids, and two relays, each being controlled by two wires, not three as I had read elsewhere. My wiring color is a bit different, but I copied the page you posted with the wiring diagram for future reference.

Is the manual that the wiring diagram is in a Kubota service manual?

Thank you so much for your help.

 

[6869704x4]

Thank you for the reply, and no problem with it being late. I discovered thru a lot of physical searching that my problem was a wire connector in the harness from the joystick to the solenoids wasn't completely connected, that is the retainer that holds the two pieces of the connector together never snapped in place, which caused my intermittent contact problem.

I also discovered in my searching that you can't take the foot pan off of an L47 to actually see all of the wires without taking the roll cage and rear fenders off first.

Your wiring diagram is similar to my setup in that there are 2 solenoids, and two relays, each being controlled by two wires, not three as I had read elsewhere. My wiring color is a bit different, but I copied the page you posted with the wiring diagram for future reference.

Is the manual that the wiring diagram is in a Kubota service manual?

Thank you so much for your help.

Yes, it's a Kubota WSM. And I can't remember where I ordered it from. I think maybe the dealer in Plainview TX