Replace the transfer fuel pump.

[Rawze]

The newer 2 piston pump looks like this...



and the old 3 piston pump looks like this...



The older pump has 4 cap-screws holding the head on down each side, and the newer one only has 2 on each side of the head.

[jimeneztrans84]

(07-25-2016 )joed2323 Wrote:  Does pre 2011 mortors, do they all have the 3cyl pumps? Motors 2012 or newer have 2cyl pumps?

If not their must be a distinctive difference in appearance between the two??

We just had one go out and the other mechanic in a different location coverted it over to the 2cyl pump.

Since it was changed out after 2-3 weeks ago the truck still stumbles whenever it wants to, cuts off for a sec then the driver has throttle again.

Light comes on fuel rail pressure codes. Could we have bigger issues with this truck???

I know for a fact all he did was convert it over to the 2cyl style.
He didnt do anything else or what some of you are stating needs to be done

Sounds like the same problem I had last couple of weeks. You probably have air in the fuel system... you need to find it asap before truck starts to shut down and harder to start.

[jimeneztrans84]

(08-03-2016 )sbtrucking Wrote:  What is the upgraded fuel pump with steel plungers part # ?

4307527 new part number for 2 cylinder pump. If you have a 2012 you should have a 2 cylinder pump just update you plungers and tappets.

[sbtrucking]

(08-04-2016 )jimeneztrans84 Wrote:  

(08-03-2016 )sbtrucking Wrote:  What is the upgraded fuel pump with steel plungers part # ?

4307527 new part number for 2 cylinder pump. If you have a 2012 you should have a 2 cylinder pump just update you plungers and tappets.

The new part # does it end with px or nx?
Thanks

[Rawze]

(08-04-2016 )sbtrucking Wrote:  The new part # does it end with px or nx?
Thanks

Any lettering code that has been "tacked onto" a cummins part number either signifies it is a reman item -- or was done by a dealer for their own reference (like when you buy a cummins part through a paccar dealer).

[dbl overdrive]

Lkq in spokane has one sitting on display i think he said it has 170,000 miles on it for 18 grand complete with filters and urea tank aND aNY wireing needed. It's from a 2011 kw. I think I could get it for around 15 or 16 if someone else was interested.

[sbtrucking]

[sbtrucking]

[sbtrucking]