Gehl RS6-42 wont run

HELP!!!!!! I have a Gehl RS6-42 with a John Deere 4045tf275 enginethat was running and dying and cranked back up but would have low power.This was a new customer at the time and he insisted on changing the injection pump because somebody told him it needed a new one.Anyway, replaced injection pump and unit has not run since.I checked all the electrical and pulled injector nozzles and had tested,Checked and rechecked timing and all checked ok. Condemned and replaced injection pump again,...

Gehl RS6-42 wont run

Gehl RS6-42 wont run