Engine/Transmission (1994 - 1998) Lift pumps

[White Rat]

While I was searching for deals on lift pumps, I noticed that there's two different styles of pumps.



Here's the first and one that's on my truck

#ad




Here's the other style

#ad




I've read in the searches that the second pump is the replacment for the first, is this true?



Cheers

 

[JFaughn]

There multible manufactures out there , that will work .
If your lift pump is tired then check your overflow valve also , the pressure should be about 28 idle - 36 2000 RPM .

 

[sdstriper]

There are Low Flow and High Flow piston pumps. Do you have a P/N for the second one?

 

[White Rat]

I've found two part # for the second one, #3917998 and #3918000. Is there a online part # search for cummins?



Cheers

 

[JFaughn]

The Cummins , is called Quick serve , you give the ser. # off the plat on the timing cover , & reg. on the site to get acc.
Also if you go to the home page here under buyer guide you'll find comin part # and a hole lot more .
Again you may want to fill in you truck info , this can be a big help .

 

[sdstriper]

I've found two part # for the second one, #3917998 and #3918000. Is there a online part # search for cummins?



Cheers

One p/n supersedes the other. It doesn't have both numbers on it though? Anyway, it is a Low Flow Piston Type Pump for an Inline Injection Pump. I believe you want a High Flow one.



Watch out for those deals on ebay, many of the lift pumps on there for cheap are p/n's that have been updated for product improvement reasons, as stated in Bulletins on Cummins Quick Serve.

 

[BigPapa]

I gave my CPL # when I bought a new pump at the local Cummins dealer and they sold me the second one. The problem with it is that the 90* hose between the pump and the prefilter will not work because of the taller fitting on the pump. I could not find any way to swap them and had to find enough 1/2" hose to do a loop. I was doing this after work and could not find enough 1/2" hose at any of the parts houses or big truck dealers that were open at 10:00 pm. I finally used some 1/2" air conditioning hose that the Peterbilt dealer had. It's been working OK for a little over a year.



Scott

 

[bgilbert]

The correct Cummins part number you want is 3936316.

 

[White Rat]

Thanks guys, I'll get the 3936316 pump and stay away from the non cummins pumps.



Cheers