Kubota TG1860 Diesel

Greenie727

New member

Equipment
TG1860
May 9, 2012
3
0
0
Boxford, MA
Gentlemen,

I just picked up a Kubota TG1860 mower (S/N 15047) with the D722 Diesel engine and a RCK54TG mower deck. The unit has 660 hours on the meter but had been sitting outside uncovered for 2-3 years. I managed to get the engine started without much cranking on what fuel was left in the tank. After I got the tractor home and cleaned up I did some additional checking and found a small hole in one of the radiator tubes directly in front of the battery. Someone must have put one of the battery hold down rods through it trying to remove the battery. Can this radiator core be replaced using the original top and bottom plastic tanks? A new radiator for this unit is very expensive!!

Also, The engine ran great after the original start up but now lacks power. I've replaced both inline fuel filters and flushed and refilled the tank with fresh fuel. With the key on the electric fuel pump will not supply fuel to the injector pump bleeder. Could this electric pump have failed after my initial run where the engine had plenty of full power? How much fuel flow should be supplied from the open bleeder with the bleed screw removed? A strong low pressure stream? Should both inline fuel filters be filled with fuel or just the filter on the output side of the pump before the injector pump inlet? What controls the electric pumps output pressure and does it run constantly with the key on or cut out with a pressue switch or timer?

I have not had a chance to locate a service manual for this tractor or D722 engine yet. Any information would be greatly appreciated. Thanks in advance for any help...Ed
 

Greenie727

New member

Equipment
TG1860
May 9, 2012
3
0
0
Boxford, MA
When you replaced the filters and fresh fuel did you bleed the air out of the lines?
Thank you for the reply Eric. After replacing the filters I tried to bleed the air with the electric pump. The fuel pump will not supply anything but a drip of fuel from the supply line to the injector. I was just wondering if the pump failed after the initial run when the engine had plenty of power? Should there be a strong stream of fuel from the bleed port to the injector pump with the key on?
 

kuboman

Member
Dec 6, 2009
721
5
16
Canada
Thank you for the reply Eric. After replacing the filters I tried to bleed the air with the electric pump. The fuel pump will not supply anything but a drip of fuel from the supply line to the injector. I was just wondering if the pump failed after the initial run when the engine had plenty of power? Should there be a strong stream of fuel from the bleed port to the injector pump with the key on?
Yes there should be good flow. Pull the line at the electric pump and see if there is flow there. If there is then you likely have an air lock.
 

Greenie727

New member

Equipment
TG1860
May 9, 2012
3
0
0
Boxford, MA
Yes there should be good flow. Pull the line at the electric pump and see if there is flow there. If there is then you likely have an air lock.
Kuboman, Thank you for the reply. I had a very weak fuel discharge from the pump. I found the pump operating but the tank pick-up tube was partially blocked. After clearing the tank pick-up tube the fuel flow to the injector pump was excellent and the engine ran great.