A Kubota model B2910 tractor uses a version of that engine. You most likely have a fuel supply problem but glow plugs has been brought up.
Assuming your engine is like the B2910, the only filter is a separator/filter before the pump. Remove the filter bowl and clean it and the screen with kerosene. Was there dirt, water or slime in it?
Take the fuel line off that goes from the filter to the fuel lift pump. (There is no valve, so be prepared for fuel to flow.) Do you get a good flow of clean fuel?
Your engine probably has a mechanical fuel lift pump. It can sort of be tested by pulling off the short line between it and the injector pump. Then hold your finger over the hose to see if it develops pressure while someone cranks the engine over. If everything else checks out and you don't get pressure, replace the lift pump.
Again assuming your engine is set up like the B2910, you don't have to do anything special to bleed your fuel system.
You can download B2910 manuals at
www.kubotabooks.com.