Boiler does not refill properly

As a rule the Kubota L2800/L3400 do not have a dip stick for the hydraulic fluid. To check the fluid level, find the small round site glass that is on the transmission, left side, just in front of the clutch pedal. This sight glass has a level line on it. If the level is low the fluid might not show in the sight glass. If the level is below the line add fluid. The fill port for the Hydraulic fluid is on the back of the tractor just below the level of the seat.

get a workshop manual and reassemble the carby exactly as per the procedures
you have assembled it wrong

hi. Im not sure excactly what is going on with your explaination about your machine, but I gather the the original mother board has died, and you have replaced it with a new one. It sounds like you have a water fill issue with your machine. If the boiler doesn't have enough water in it, then the pc board will shut the machine down. Ive never worked on a m39, but they are from the Faema corporation, and Faema/ La Cimbali electronics canbe very complicated. Dont now why they make such complicated electrics, cause there are hundreds of other brands with simple electrics.
If your boiler was empty, then the water fill cycle might be a timed cycle, and is shuting down before the water level has reached the water level probe inside the boiler. If this is the case, then once it has stopped, turn the machine off, wait 10sec, then turn it back on again and let it start the fill cycle over. You may have to repeat this a number of times until it has reached the water level probe inside the boiler. Some machines are designed to have a slow water fill, because when you draw hot water from the boiler for making tea, fresh cold water is pumped back into the boiler to replace what you have taken out, and if it fills too quick, then your steam pressure drops. So by filling slower, the machine will maintain its steam pressure. Good idea in theroy, but its only good for cafes that do 300 coffees per hour.
Im hoping that your machine is configered this way, cause it will probably just have to be turned on a few times until it has reached the water level probe as I explined in the begining. If you have a sight glass, you can check to see how high your water level is. If your level is correct, and its still not working right, then id recomend calling a repairer. There are number of things that could be wrong, causing your board to die. Faulty solenoids. switches, touch pads, pressure switches can cause main board issues. Hope all this helps with getting your machine working properly. Dazza Repairer

First thing check the manual fill under drain tray to make sure it is in the off position, next check the water level in the sight glass, I will assume the machine has a level probe connected to the boiler and not the level card on the sight glass. Next check the inlet valve. If water comes into the boiler without stopping when the machine is turn on and it overfills then the connection on the level probe is missing or the inlet solenoid is not closing and needs to be checked for blockage.

hi, if the oil level was correct before you changed it, then there is no reason that with the correct amount of oil the level will not show, some times the specific amount required doesnot fill up the engine as it was previously, if you still have the old oil measure the exact amount that came out of the engine, this should clear up any problem you are having, also tilt the machine slightly towards you if the oil is slightly low as you tilt the bike you should see it apeare in the glass, if is to high tilt it the opposit way and the level will go down check again

Do you have a sight glass that shows water level in boiler on this loop? If so is it marked where normal water level is supposed to be? There should be a water line connected to boiler with a valve on it. This will be a manually operated valve unless it has auto fill control. Locate this valve and slowly add water until level in sight glass is back where it should be,then shut valve.While you are doing this the boiler should be at operating temperature because hot water expands and you don't want to overfill. There should be a temperature and pressure relief valve on top of your boiler to prevent unsafe conditions but I wouldn't count on it working properly if it is very old. My main concern is for your safety so if you are unsure of something don't do it. If your boiler has a automatic water make-up on it then you need to have a service tech. find out if it's not working,and repair or replace it. I hope this helps you. Thanks

if there is not a sight glass on the side, or a dipstick on the oil fill cap, then you check the level by draining and refilling it to the proper CC ammount.

It is on the right side of the machine behind the grouphead if you remove the top panel you will see te box with the red switch sticking out. MAKE SURE THERE IS WATER IN THE MACHINE FIRST!!!!!! Do not trust the sight glass, if the level probe is in there, turn machine to 1 then disconnect the electrical connector on the side of the sight glass, the pump should kick in and water will flow in the boiler, if the level does not increase in the glass, then the machine turned itself off because the element got too hot from lack of water. The hole for the sight glass is blocked.

If reset is used alot it is possible that it is time to replace it. You should think of installing a water softener on the inline water(everpure7S0). For the machine being out of water is the probe on the boiler or in the sight glass?
If it is on the sight glass talk to the service people and see if they can refit it to the boiler that way it will be in contact with the water in the boiler and not whats in the sight glass, as those holes get clogged easily.
Have the element checked also, there might be a crack in the legs which could also be causing the thermostat to trip.

clear the connections of glass with boiler. change glass seals. (be careful not to brake sight glass tube)