Tractor quit running

A couple days ago my compact tractor quit running when I moved the accelerator level to slow the engine down to get off the tractor. It run fine up till then. It is a Cub Cadet model #7235 with a three cylinder diseal engine. It acts like its not getting fuel. The engine turns over but will not start. There is fuel up to the pump assembly but doesn't seem to be any fuel going to the cylinders when I took off the pipes going to the injectors but I'm not sure what I should be seeing. Any ideas or sugestions on what the problem might be or what else to check?

Thank you,

Bob 

 Crack the injector lines at the injectors and crank the engine over, do you see a steady stream of fuel?

 Thanks for getting back to me but I already had it repaired. The problem was the fuel injector pump.

Bob