Someone modified my cooling system : Kubota L3130

[hendr1x]

Hello everyone,
I just installed a block heater in my L3130.

For some reason, my coolant reservoir does not have a line coming out of the bottom...just an empty nipple.

The radiator has two big lines (one on top/one on bottom)...a small line from the radiator cap which goes to the reservoir cap and continues on to empty on the bottom of tractor. Finally there is a small line on the bottom corner of the radiator that runs directly into the engine block. This is all that I can find and I don't see any where in the manual that it shows all the lines.

Any idea where the missing reservoir line is suppose to go and why it would get removed?

Thanks

 

[Henro]

Hello everyone,
I just installed a block heater in my L3130.

For some reason, my coolant reservoir does not have a line coming out of the bottom...just an empty nipple.

The radiator has two big lines (one on top/one on bottom)...a small line from the radiator cap which goes to the reservoir cap and continues on to empty on the bottom of tractor. Finally there is a small line on the bottom corner of the radiator that runs directly into the engine block. This is all that I can find and I don't see any where in the manual that it shows all the lines.

Any idea where the missing reservoir line is suppose to go and why it would get removed?

Thanks

No idea. But you can get a workshop manual here which might answer the question:

http://kubotabooks.com/AutoIndex/index.php?dir=Tractor%20Owners%20Manuals/&file=L3130%20-%205030%20WSM.pdf

 

[Jchonline]

You mean the line

Hello everyone,
I just installed a block heater in my L3130.

For some reason, my coolant reservoir does not have a line coming out of the bottom...just an empty nipple.

The radiator has two big lines (one on top/one on bottom)...a small line from the radiator cap which goes to the reservoir cap and continues on to empty on the bottom of tractor. Finally there is a small line on the bottom corner of the radiator that runs directly into the engine block. This is all that I can find and I don't see any where in the manual that it shows all the lines.

Any idea where the missing reservoir line is suppose to go and why it would get removed?

Thanks

So you have the line from the radiator cap to the overflow tank correct? When the coolant boils in the radiator the volume expands, so it needs a way to relieve pressure. The cap has a pressure relief valve to allow that extra to go into the overflow tank if it gets too hot in the radiator.

From the overflow tank, I think (dont have my machine in front of me sorry) you will usually have a line on the cap that just runs out under the tractor..for overflow of the overflow. Are you missing that line?

 

[5030]

I don't on either of mine. Line from the rad to the expansion bottle and one in case it gets too full which, should never happen

 

[RickB]

The hose from the radiator neck is supposed to be connected to the nipple at the bottom of the overflow tank. The nipple on the overflow tank cap should have a hose that drains to the ground. The tank should never overflow under normal conditions.

 

[Rebeldad1]

radiator cap line usually runs to the bottom of a overflow tank so the fluid can cycle back and forth to the radiator. the line at the overflow cap runs to somewhere below the radiator so excess coolant in the tank goes to the ground without making a mess on the tractor. this happens when the engine boils over or the radiator and overflow tank is overfilled.

the two lines on the radiator i am assuming are the upper and lower radiator to engine hoses.

 

[5030]

Interesting comment. On both my M's the line goes through the TOP of the cap and sticks down in the bottle about 3/4's of the depth and the other line (also in the cap just extends about 1/2" into the bottle. The line from the top of the rad is the line that goes deep in the bottle and there is no bottom nipple or outlet on either if them. It's an expansion tank, nothing more. Keeps the rad full to the top. When the rad is hot, it pushes some coolant into the bottle. As it cools, it sucks it out of the bottle, so no air space in the rad ever. You don't want air in the rad in the first place.

When you change your coolant Kubota recommends topping off the rad and adding coolant to the bottle to the full line and warming the engine and then allowing it to cool and add coolant to the full line again to top it off.

Obviously the OP is or has changed his coolant so I'll add the the only coolant Kubota recommends for their engines if good old propylene glycol of the pea green variety in a 50-50 mix. No fancy long life or Global coolant, just the cheap stuff.

I change mine every 2 years btw.

 

[RickB]

Interesting comment. On both my M's the line goes through the TOP of the cap and sticks down in the bottle about 3/4's of the depth and the other line (also in the cap just extends about 1/2" into the bottle. The line from the top of the rad is the line that goes deep in the bottle and there is no bottom nipple or outlet on either if them. It's an expansion tank, nothing more. Keeps the rad full to the top. When the rad is hot, it pushes some coolant into the bottle. As it cools, it sucks it out of the bottle, so no air space in the rad ever. You don't want air in the rad in the first place.

When you change your coolant Kubota recommends topping off the rad and adding coolant to the bottle to the full line and warming the engine and then allowing it to cool and add coolant to the full line again to top it off.

Obviously the OP is or has changed his coolant so I'll add the the only coolant Kubota recommends for their engines if good old propylene glycol of the pea green variety in a 50-50 mix. No fancy long life or Global coolant, just the cheap stuff.

I change mine every 2 years btw.

The dip (longer) tube in your expansion tank serves the same purpose as the nipple on the bottom of the OP's tank.

 

[CADplans]

Hendr1x,, your overflow tank is shown in this Kubota video, EXACTLY as you describe it,, at 1:36 into the video.

So, that seems to be correct

Now, you only have one hose left to solve for,,

My tractor has extra hoses for the plug-in engine heater,, but, my tractor was originally in Canada,,
I guess it gets colder in Canada,, than Virginia??

 

[hendr1x]

Thanks everyone for the replies...

1) Henro : I have the manual but can't seem to find it outlined anywhere

2) Jchonline : I have the line from the radiator cap to the overflow tank. However mine goes to the cap. The cap also has another nipple (and line) that runs under the tractor. The cap also has a short line that runs down into the tank. However the bottom of the tank has a nipple that is empty.

3) RickB : See what I said above please

4) Rebeldad1 : I can move it to the bottom but then my cap will have an empty nipple. In regards to the two lines I mentioned...yes those are just the flow lines for the engine.

5) 5030 : Sounds like the same setup as me but mine has a nipple on the bottom

6) CADPlans : Seems like the one in the video has the same cap setup as me but doesn't have the nipple on the bottom.