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  Topic Review (Newest First)
12-03-2019 09:51 PM
mruysch Just did mine. The rear filter is a cartridge style and the cap does come off the bottom
12-01-2019 02:31 PM
Cummins0867
Quote:
Originally Posted by gsbrockman View Post
Is your “longer” priming cycles occurring on a “cold” engine.....one that has sat overnight perhaps?

https://www.cumminsforum.com/forum/2...ld-engine.html
Yes.....I have only ever changed them on a cold engine....yes usually it sat overnight. My luck would be......that of a guy that crawls under the truck to change the fuel filter and that "hot exhaust pipe"......would....."jump right over there and burn my arm". So I always try to err an the side of caution.
11-29-2019 01:33 AM
gsbrockman
Quote:
Originally Posted by Cummins0867 View Post
Its the same procedure if you run out of fuel in order to prime the system again. Its in the owners manual. If I remember correctly...as @10%more mentioned.....you place the truck (push button or key) in the run position without putting your foot on the brake pedal for 30 seconds (Do not start the truck or attempt to). Then hit the button/Key again to turn it off. Then repeat this same step, you must do it twice. When you place it in the run position you can hear the fuel pump pumping fuel then in about 30 seconds it stops. Then you do it again...this fills the filters up and pushes out the air.
Is your “longer” priming cycles occurring on a “cold” engine.....one that has sat overnight perhaps?

https://www.cumminsforum.com/forum/2...ld-engine.html
11-29-2019 12:51 AM
Learjet I've had no luck with the prime per the procedure mentioned...I been eyeing the fuse method and will try that on my next filter change. I have cycled the key up to 5 times and still get a prolong crank before starting...hate that.

Ram if you are listening...just add a damn switch under the hood on the fuse box to prime the system. Would be an easy aftermarket mod to do...if someone was willing....a fuse tap and a momentary switch.
11-28-2019 11:39 PM
Lins
Quote:
Originally Posted by Cummins0867 View Post
Quote:
Originally Posted by Lins View Post
Have you confirmed that the pump keeps running that way with yours? I never get more than the typical 2 second prime.
Turn the radio off, open the door/roll down the window and listen you can hear it and it runs for quite a while. I believe it runs as long as it needs to to fill up the filters or as needed. If you are inside the truck with the windows up you won't hear it unless you have really good hearing. When you have your foot on the pedal.....to start the truck.....you will only hear until the truck starts then the engine drowns it out. I haven't changed the filters yet on my '19 only on my previous 6.7 Cummins trucks...I heard it every time on those trucks.
Mine will not run for any extended time that way. A year ago when I did the filters I was outside the truck while my daughter was inside and we tried a few different things. When I jumped the fuse for the pump when I did them this year the pump clearly kept running (obviously).
I don’t see how it would keep running otherwise if the manual has to explain how to bump the starter on keyed trucks to initiate the prime...?

Anyway, I don’t want to derail this thread too much.
11-28-2019 11:32 PM
Cummins0867
Quote:
Originally Posted by Lins View Post
Have you confirmed that the pump keeps running that way with yours? I never get more than the typical 2 second prime.
Turn the radio off, open the door/roll down the window and listen you can hear it and it runs for quite a while. I believe it runs as long as it needs to to fill up the filters or as needed. If you are inside the truck with the windows up you won't hear it unless you have really good hearing. When you have your foot on the pedal.....to start the truck.....you will only hear until the truck starts then the engine drowns it out. I haven't changed the filters yet on my '19 only on my previous 6.7 Cummins trucks...I heard it every time on those trucks.


Page 112 in the Diesel Supplement "Priming if the engine has run out of fuel".
11-28-2019 10:56 PM
Lins
Quote:
Originally Posted by Cummins0867 View Post
Its the same procedure if you run out of fuel in order to prime the system again. Its in the owners manual. If I remember correctly...as @10%more mentioned.....you place the truck (push button or key) in the run position without putting your foot on the brake pedal for 30 seconds (Do not start the truck or attempt to). Then hit the button/Key again to turn it off. Then repeat this same step, you must do it twice. When you place it in the run position you can hear the fuel pump pumping fuel then in about 30 seconds it stops. Then you do it again...this fills the filters up and pushes out the air. If there's any excess fuel it will return to the tank via the return line. I think this is where it pushes out the air but I may be wrong. There isn't any need to bleed the system, at least I never had to in any of my previous Cummins trucks.


Cycling the key: This is moving the key/push button and placing the button/key into the run position without actually starting the truck (do not place your foot on the break pedal so the truck will not turn over).
Have you confirmed that the pump keeps running that way with yours? I never get more than the typical 2 second prime.
11-28-2019 10:39 PM
Cummins0867 Its the same procedure if you run out of fuel in order to prime the system again. Its in the owners manual. If I remember correctly...as @10%more mentioned.....you place the truck (push button or key) in the run position without putting your foot on the brake pedal for 30 seconds (Do not start the truck or attempt to). Then hit the button/Key again to turn it off. Then repeat this same step, you must do it twice. When you place it in the run position you can hear the fuel pump pumping fuel then in about 30 seconds it stops. Then you do it again...this fills the filters up and pushes out the air. If there's any excess fuel it will return to the tank via the return line. I think this is where it pushes out the air but I may be wrong. There isn't any need to bleed the system, at least I never had to in any of my previous Cummins trucks.


Cycling the key: This is moving the key/push button and placing the button/key into the run position without actually starting the truck (do not place your foot on the break pedal so the truck will not turn over).
11-28-2019 08:47 PM
NordicNevs Is there a place to bleed the air? I always appreciated the Duramax trucks I had with the bleeder screw and priming pump.


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11-28-2019 07:51 PM
Lins
Quote:
Originally Posted by DougAK View Post
Seems like a stupid question, but how do you cycle the prime with push button ignition ? I know how to do it with a key start truck, but am at a loss on the push button. Manual says cycle the key..
Quote:
Originally Posted by 10%more View Post
Think you push the start button twice, without touching the brake. Think one push is just accessories. The next push turns on the fuel pumps and ignition but does not start the truck. That situation is what you want for priming. Do not remember for how long or how many times you need the pump on to complete the full prime.

With the CP4 pump now you need to have all the air out. That pump is not tolerant of air instead of fuel.
I've never figured it out if you can actually get the 15 second prime, but you can jump the fuse location under the hood. That's what I did when I changed the filters a month or two ago. Most the air is gone after 20 seconds, I went 30 seconds and when I started it, it fired instantly.
11-28-2019 01:26 PM
Cummins0867
Parker 50660 Fuel Filter Element

Quote:
Originally Posted by gsbrockman View Post
The rear filter/separator for the 2019+ trucks is not a spin-on......it is a cartridge style, very similar to the underhood fuel filter.
I was trying to figure out the same thing as you. Here's what I found. If you go to the video link at 1:48 and pause it....it has a Part number Parker 50660. Parker makes the filter but I can't find it online. If you go to Parker's website you can call them and get one as they say its too new and it isn't listed on their website. You can also enter your zip to find where to buy local. Im about to change mine. I just ordered at dieselfiltersonline as it was the lowest price. Ill verify that they are in fact Mopar filters before installing.




Parker link : https://www.parker.com/portal/site/P...egory=products
11-23-2019 03:50 PM
dillonjm
Quote:
Originally Posted by gsbrockman View Post
The rear filter/separator for the 2019+ trucks is not a spin-on......it is a cartridge style, very similar to the underhood fuel filter.
Sorry—you are correct. I retract my late night postings.
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