D6T S# LAY704
At start up, this thing sounds like its running on 3 of 6 cylinders and the rpms (should be around 800) are around 300 while this is going on. The funny thing is it doesn't do this every start up. The operator is telling me that its at its worst on cold mornings, so I was thinking maybe there was water in the fuel system that was freezing overnight...…….no water found. I was suspicious of the fuel transfer pump and went ahead and replaced it since it was the original and had 7800 hours. It seems a bit better, but with the inconsistency of the issue, I'm having trouble trying to narrow this down. I would like to know how this fuel transfer pump works electrically and I have the schematic for the machine. Does this pump run fulltime from ignition on? is there a pressure switch that runs it? In the schematic its not easy to follow (which is unusual) and a bit confusing as to where exactly the wiring runs in a certain area. I need to make sure the transfer pump is working properly before I call CAT ET out. Any suggestions?
At start up, this thing sounds like its running on 3 of 6 cylinders and the rpms (should be around 800) are around 300 while this is going on. The funny thing is it doesn't do this every start up. The operator is telling me that its at its worst on cold mornings, so I was thinking maybe there was water in the fuel system that was freezing overnight...…….no water found. I was suspicious of the fuel transfer pump and went ahead and replaced it since it was the original and had 7800 hours. It seems a bit better, but with the inconsistency of the issue, I'm having trouble trying to narrow this down. I would like to know how this fuel transfer pump works electrically and I have the schematic for the machine. Does this pump run fulltime from ignition on? is there a pressure switch that runs it? In the schematic its not easy to follow (which is unusual) and a bit confusing as to where exactly the wiring runs in a certain area. I need to make sure the transfer pump is working properly before I call CAT ET out. Any suggestions?