L2350 Getting air in fuel system

ERICKUBOTAPA

New member

Equipment
Kubota L2350DT L2502DT B3200 B7200 B8200
Mar 3, 2026
1
0
1
PA
Hello, new member first post, i have a L2350 good running tractor, brought it in for service. Changed the fuel filter, tank has no shut off so i changed it quick and let the fuel fill the filter. I started tractor it ran for a minute and quit, i bled the filter, then bled the pump and then bled the lines at the injectors. Tractor will run for 20-30 seconds and quits, rebled everything and its got air again. Did this 3 times keeps getting air.
I ran i clear bypass line from tank to injection pump, to bypass filter to see if that was the issue, when i did this i notice right before the engine stalls out it dumps air and fuel out of the pump back toward the tank, this kills the engine.
Any ideas what would be cause air and fuel back pressuring from the pump to tank and getting air?

Tractor ran perfect before this, 1322 hours on it.

Thanks for any help.
 

mikester

Well-known member

Equipment
M59 TLB
Oct 21, 2017
3,994
2,689
113
Canada
www.divergentstuff.ca
Open the bleeder valve on the fuel line. RTM or find a manual online to help you locate the valve and proper bleeding procedure for your machine. This is the best way to get the air out of your lines.

The hard way is to keep starting and running your machine at full throttle to try and get the air out and prevent stalling the engine. Keep a charger handy if you choose this route, it will take you a while to purge the lines of air.