fuel in the oil L1500

[fj55-100]

total newbey question .
I replaced all the hoses on the loader . and went out back to push dirt when it stalled .like it ran out of fuel ,the tank was near empty .and the oil was over full . i had run it 2 nights before with no issues .
I replaced the oil added new fuel and it ran fine .
Question was i supposed to turn off the fuel tank valve after each use . or did the fuel bleed past the injector pump when it was running .
Thanks

 

[fj55-100]

it was running poor , mabey that was why .
I took the injectors out and cleaned them . and it runs way better , used it for 3 hrs around the lot to push dirt where i needed it . I will leave the fuel on and if does it again i will replaced the injectors
Thank you Vic.