Replace your canister style fuel filter and fill with diesel upon installation, make sure your screen style fuel filter is clear ( near injection pump ). You can shoot a small amount of ether in also, it will not harm engine.
Keep your canister fuel filter loose and bleed the system via primer pump until no more air comes out.
Focus on removing air before you try diagnosing glow plugs and such, if it turns over decent it should start regardless of a bad glow plug, it will just take a minute.