Cm870 lift pump or gear pump?

[Rawze]

(12-26-2018 )Evotrucker Wrote:  So I was getting ready to take of the gear pump, I was told to find that fuse and check it.

So i manage to find it and it actually was burned out. I replace turn the key over and I 4got I disconnected the line that goes to the gear pump. Bunch of fuel dumps out and I turn it of connect it back it’s now making this horrible noise like from a scary movie.

https://youtu.be/4eGAD84BJrM

Here is a video of the gear pump making that sound and some pictures of the fuse

In the video, your pointing to a line going into the back of the GEAR PUMP....

THAT IS NOT THE ELECTRIC LIFT PUMP!!!!!! --- THE PUMP YOUR POINTING TO IS MECHANICALLY DRIVEN BY THE INJECTOR CAM WHEN THE ENGINE IS RUNNING and is not electrical at all.

THERE ARE 2 PUMPS --- THE GEAR PUMP and THE ELECTRIC LIFT PUMP.

The fuse you found and the horrible sound you hear is for the electric lift pump and not the gear pump. The electric lift pump is located to the right of the fuel filter on the CM870/CM871.