I've corrected my error with the camplate and rebuild the original pump.
Carried out bench test as suggested and the Lhm fluid is firing about 4' to 6' across the garage


Out of interest how did you turn the sprocket as after doing it by hand I thought why not use my elecrtical drill

Jim, How did you remove the majority of the LHM from the pump

If the same problem appears, it must be electrical
Kenny