Engine/Transmission (1998.5 - 2002) Moving lift pump to frame - have a question.

[Joe Mc]

Tom, 3/8" "fuel" line hose, it doesnt have to be "fuel injection" rated as it's not high psi - just needs to withstand fuel being in it all the time. Also, to keep the tank from draining during the cut of the steel line I disconnected the line from the top of the tank, this made easier installation of the ball valve shut off pre-pump for clean filter changes. Was a real PIA but worth every curs word used, hardest part was getting to it. I ended up droping the drive shaft from the the rear and slid it to the pass side holding w/bungie cord so I could reach over the top. Then the little clip you have to squeeze while you pull the line was another fun thing, once you get to it. It's all fun though.



If you wish to chat drop me an email to the address I PMed you and include your a daytime phone number I'll call you from work Monday, on the company's dime.

 

[Tom W]

O. K. I just finished the job. I got a new lift pump from Cummins, it has a female plug on the bottom side, the old lift pump has a pigtail about 8" long with a female plug. The new pump could not be used in the original location without extending the wiring but this was not a problem as I was relocating the pump.



I removed the mounting bracket from the engine and replaced it with the plate suggested by Cummins Thunder. I mounted the bracket in front of the fuel tank and immediately to the rear of the large cutout in the frame. I had to drill a third hole in the bracket to mount the fuel pump because the pump is turned 180 degrees from the original position. The bracket allows just enough clearance for the wiring but the male plug cannot be removed without unbolting the pump. I cut the steel line about 8" to the rear of the pump.



I cut the male wiring plug off the harness and extended it with 14ga wire (soldered, covered with heat shrink and plastic conduit)



I had previously replaced the banjo bolts with Aeroquip fittings so I had hoses made with press on fittings. I expected fuel to run out when I removed the hoses but it did not - probably siphoned back into the tank -but I was ready to slip on a long piece of hose and blow back to the tank.



I put the hose to the fuel filter in a one liter soda bottle so the air would be removed from the line - big mistake - I turned the key on and the pump began running, in about one second I could tell fuel had got to the pump and one more second it was filling the soda bottle, in about five more seconds it was spraying all over me and the engine compartment. I was wondering if it was ever going to stop. It finally did after about one more quart of fuel.



After hooking up the hose it started right up and has 13 lbs pressure. I have not tested it yet but I couldn't detect any pressure drop in a 3/4 throttle run. I just finished washing the engine compartment and a had good hot shower. I didn't run into any serious problems but got my arms all scratched up and will have to wear long sleeve shirts for awhile.



Thanks to all for your advice.