R & R DEF pump on 2020 Ram 3500.

[WaynesWorld]

I replaced my DEF pump in my 2020 Ram 3500. I used the tool required but I modified it. It is very hard to do. I ground off one leg 1/2" to make it work. The ring is so hard to remove that I had to use 1/2" 3' ratchet. The floppy rubber tags are the level gauge. Just letting you know. I didn't want to wait 6 weeks for the stealer to do it.

 

[Cummins12V98]

I used a rectangular pc of steel bar to drive off and on the ring.

 

[bcbender]

How many miles on you 20' when the pump went out?

 

[Topzide]

Adding to what @bcbender is asking, what was the cause for replacement? Mine developed a leak which took out the DEF level gauge which put truck into de-rate! Had around 175K when it went south on a trip.

 

[WaynesWorld]

How many miles on you 20' when the pump went out?

I had only 17,000 on the truck when it happened. I sure wasn't waiting for the dealer to do it.

 

[Cummins12V98]

Side question, how do you remove old DEF besides bottom ring?

 

[WaynesWorld]

Side question, how do you remove old DEF besides bottom ring?

See the post for the tool and how I did it.

 

[Cummins12V98]

See the post for the tool and how I did it.

I don’t see what you are saying. My dad’s truck has set for a while and I’m concerned the def is bad. I just want to remove it and fill with new before starting it.
Can I simply slide a hose down the fill hole and suck out the tank?

 

[bcbender]

Can I simply slide a hose down the fill hole and suck out the tank?

I'd certainly try it. Use a Mighty Vac or something similar, I used a hand held model with a small tube to suck out a few hundred cc of ATF from my AISIN last year when I slightly overfilled it.. worth a shot prior to dropping and unhooking things.

This is what I use for non oil based liquids, coolants, etc.

 

[Topzide]

@Cummins12V98, I'd second what @bcbender has mentioned. If you are working on a lift, there are a couple of ports on the tank that may be easier to get to for extraction. You could also use https://www.harborfreight.com/multi-use-transfer-pump-63144.html?_br_psugg_q=transfer+pump. I keep one around the house for just such uses! Pick up another to put back on shelf in case it gets hard to use.

 

[Diesel85]

I got a bunch of these from HF... and I got barb fittings to change diameter of hoses if I need to make it longer or smaller hose to stick into something.

https://www.harborfreight.com/lubricant-suction-gun-59513.html

#ad


I also get those huge 500 ml syringes off Amazon for precise metering of fluids. Like 2 stroke oil or adding PowerService so I don't overdose.

 

[WaynesWorld]

Adding to what @bcbender is asking, what was the cause for replacement? Mine developed a leak which took out the DEF level gauge which put truck into de-rate! Had around 175K when it went south on a trip.

The failure was due to the pump stopped working.

 

[Cummins12V98]

Diesel85, I have the same pump as that but I figured it was so small it would take a while to suck it all out. I was thinking about an electric pump. Bottom line is I need to see if a hose will drop to the bottom of the tank.

Thanks all for the suggestions.

 

[Cummins12V98]

I ran a poly tube down over 24" and hit a stop. Nothing would siphon out so I blew into the hose and no bubbles, GRRRRR. Looks like a full tank DEF will hit the gravel.

 

[sag2]

See TDR issue 114, The Rest of the Story. It shows the check valve that will stop anything but the smallest rigid hose from entering the tank. I was able to get almost all of the DEF out through the fill port.

 

[bcbender]

That's what I was thinking also, its how I got ATF out of the AISIN dipstick tube, I used the same 500ml as Diesel85 for that job, I have several for different fluids, the syringe style is about the only way to get fluid measured and into the diffs on my CanAMs

 

[WaynesWorld]

Diesel85, I have the same pump as that but I figured it was so small it would take a while to suck it all out. I was thinking about an electric pump. Bottom line is I need to see if a hose will drop to the bottom of the tank.

Thanks all for the suggestions.

It's impossible to siphon DEF out because of the small line to fill it. I had a full tank as well. I used a 10 gallon pan & caught most of it when I finally broke the ring loose.

 

[Cummins12V98]

I watched a youtube vid posted by TOO TALL??? He posted for a while on here. SO simple, just remove the fill tube from the tank by squeezing the two green taps and wiggle off. Bought a bubble primer with 32" poly hose on each end and started the flow and the full tank was empty in no time!!!

 

[Cummins12V98]

So happy I watched his video.

 

[WaynesWorld]

So happy I watched his video.
View attachment 140663

Unfortunately my 2020 isn't like that. What year was that truck?