Oil & Fuel Kubota L2800 coolant draining and volume

[JohnMMorgan]

I have just drained and flushed the coolant in my L2800 but I must be doing something wrong.

The operator's manual lists the coolant capacity as 6 L (not counting the recovery tank). But I can only get out and back in about 3.5 L. I have removed the radiator drain plug, fill cap and disconnected the lower hose.

I filled it once with the cooling system cleaner as instructed and ran the engine till warm and flushed and warmed twice with plain water. But since I am apparently changing a little over 1/2 the fluid each time, I don't know what kind of mix I will have when I put new coolant in. What am I doing wrong??

 

[teg]

Subscribing since I need to do this again. The first time I didn't measure anything... drained it all from the lower hose to the engine block. Hope someone else will reply... If not, I'll let you know how it goes this weekend!

 

[Fallon]

There are a lot of spaces in the block you can't drain. Often 1/3rd of the volume of coolant gets stuck in there & decreases the volume to refill.

You need a coolant tester to validate your mix. If its mostly water left in there fill it part way up with pure antifreeze let run a bit to mix it well then test it & go from there.

 

[ritschner]

That is normal for the L2800. When finished flushing and draining start by adding 3L of straight anti-freeze, then top off the last 1/2L or so with distilled water.This will get you a 50/50 mix. Finish by adding a 50/50 mix to the overflow tank. Fill the over flow tank to half full since the engine will bleed some air during the initial run and draw some of the coolant mix from the overflow tank as it cools. Recheck the overflow tank the next day.

 

[JohnMMorgan]

Oh gosh, thanks, I should have waited for advice. I already put in 3.5 L of 50-50, so now I either need to start all over or drain and add concentrate till I get the concentration up! Why doesn't the manual explain this?

John

 

[Fallon]

That is normal for the L2800. When finished flushing and draining start by adding 3L of straight anti-freeze, then top off the last 1/2L or so with distilled water.This will get you a 50/50 mix. Finish by adding a 50/50 mix to the overflow tank. Fill the over flow tank to half full since the engine will bleed some air during the initial run and draw some of the coolant mix from the overflow tank as it cools. Recheck the overflow tank the next day.

Actually that's normal for most water cooled engines period.

 

[Fallon]

Dupe post

 

[ritschner]

Fallon is correct, this the procedure for all engines when flushing. 50/50 premix that is sold is only good for topping of in an emergency. It is far more economical to buy a gallon of pure antifreeze and a gallon of distilled water. JohnMMorgan drain the coolant again and keep what comes out, do not flush the system. It will be about 25/75 coolant to water. When drained, close the system and fill with 2.5L of pure anti freeze and then top with distilled water. With the mix that stays in the tractor this will give you a 50-55% antifreeze mix. Take the coolant that you removed and pour into containers only filling 2/3's full. top off the containers with straight anti freeze. That should give you 5-6 liters of 50/50 mix for future use.