Machine is not cranking over. Just had it serviced and i think its been over filled with oil... Based on the dip stick its above the full mark... It was running fine then it died.. And wont crank over..
Drain the oil & inspect it.. see if it has foreign fluids in it.. water, fuel, hydro. If not, drain it down to an acceptable level.. & pull the injectors.. & try to start it.. IF its hydro locked from fluid ON TOP of the pistons, pulling the injectors will allow it to expel the fluid.. IF it has glow plugs, that'll do the same thing.. IF it doesnt turn then, let us know..
Other electrical functions working? Starter or relay clicking but not cranking, or starter engaging but engine won't turn over? Can engine be barred over by hand?
Need more info. Did it run right after you got it serviced ? Is it spinning over but not firing up ? Didn't give us much to go on. Oil level on the high side of the full line slighty would not even factor into a no start in my starting of diagnostics If the machine was running.