Heavy Equipment Repair Questions? Ask an Expert Now.
Pull your valve cover off and check when the pin engages the timing hole if your intake and exhaust valve are loose on #1.
I'm not talking about your valve clearances, what I am saying is with the engine pined with the timing pin the valves should be loose on #1 cylinder. This will prove that you are infact on TDC #1 which is where the engine needs to be to time the pump correctly. If these valves are not loose and your valve lash is correct then you have a gear timing issue. Kevin