The PPE verison on the 1792 is working great with the updates they had done to it
Yeah, those were my discoveries. I was in constant contact with Tim at Essex, the pumps manufacturer. I came up with a Nitrile seal to replace the Viton seal, which would expand due to the aromatics of ULSD, not to mention they were installing the seal upside down. We installed a National seal #350435. The next area of concern is the motor shaft, it is not induction hardened, but needs to be. We also incorporated a weep hole (our pumps) in the pump body. In the event of seal failure, fuel would bypass the bearing and drip outside. Common failure is the seal eating into the shaft, fuel bypassing the seal, washing out the bearing, motor filling with diesel and quickly burning out the brushes. The success of the PPE pump, is because of all of our failures, that I paid for.