fuel issue L3830

wblei

New member

Equipment
l34830 kubota
May 17, 2021
4
1
3
w.union wv
shuts off at 2/3 to 3/4 tank(visual not gauge) add fuel starts and runs fine. what do i need to repair or replace so i use more fuel from tank. thanks
 

Dave_eng

Well-known member
Lifetime Member

Equipment
M7040, Nuffield 465
Oct 6, 2012
5,235
1,018
113
Williamstown Ontario Canada
A quick guess is the lift pump is not working.
.
On many machines gravity will deliver fuel to the injection pump when operating on flat level ground and with a tank that is mostly full.

For other times, low fuel level, driving up a slope the fuel system uses a small pump to lift the fuel up (just a phrase) to feed the injection pump. When that pump stops working your symptoms appear.

Your pump is mechanically driven off the side of the engine. This raises a further caution because if its pumping diaphragm fails diesel fuel can end up mixed with the engine oil so check oil level for being too high.

forum L3830 lift pump.jpg


forum L3830 Lift pump location.jpg


Open the section of line shown a #120 above and crank the engine. If the pump is good fuel should spurt out.

Dave
 
Last edited:

wblei

New member

Equipment
l34830 kubota
May 17, 2021
4
1
3
w.union wv
thanks dave, did test this morning your diagnosis is correct. will order part today luckily no fuel in oil