picked up a 2008 L175 has no oil pressure. i took out the pressure sending unit and put a manual gauge and there is nothing. even unhooked the gauge and started it with nothing hooked up and no oil my question is. is this a know issue with these machines? we have another 175 with over 7k hours on it and never touched it, this one has 4k on it. i know i will be pulling the engine out also how do you tip the cab forward on these machines? Thanx in advance,