Volvo Mack Scr Def pump. Take apart 21577511 or 21577507

[@razaghumman2412]

Thanku for very informative Volvo vids

[@hongdelim2139]

bravo exactly the video i was looking for ^.^

[@nealk6387]

Volvo uses the same design def pump on their small and medium platform machine, 24 volt of course.

[@michalvranek5969]

Heh, you damaged supply modul a lot.. 🥴 I work at assembly line for these pumps.. Interesting to see how someone disassembling one.

[@senakakarunamuni9653]

Def pump not working whats the major issues

[@seandibble8665]

Looks like a diaphragm pump. Pretty neat, thx.

[@johnahrens1216]

My pump went bad so I need to replace it and all the pump look the same is there a difference? Its the same pump in this video.

[@drey-4893]

As far as i know they are same up to 2021 for volvo and mack. But check with dealer with your vin

[@ejallo4218]

What pressure reading will be the normal DEF pump and failed ones?

[@volvobigtrucks8640]

a good pump builds and holds or around 130 psi,

[@ejallo4218]

Thanks so much it is very valuable lesson I learned

[@tischlerbmw21]

@@volvobigtrucks8640 under what tab on tech tool can you see the pump pressure and speed?

[@drey-4893]

scr system test

[@MrAlanRene]

Wonder where the tinny filter goes...

[@johanpeters5528]

Excellent

[@vitaly_vasilev_2012]

Спасибо.

[@bigsean131]

Damn I just heard that humming sound when I shut truck off.... I changed air dryer out and all of a sudden my yellow engine light comes on and a code SN 0 5443 FMI 13 ...Help Could this be it ? Can I just change filter? Humming just started out the blue

[@volvobigtrucks8640]

the code you sent is for a dosing module that supplies air and fuel to the 7th injector, the humming sound is mostly not related to it, the def pump behind the def tank will make a humming sound right after key is shut off and its normal = good pump is working

[@bigsean131]

volvo big trucks I hoping to tighten batteries down and check that lil wire that goes to positive terminal and that fixes it I did not my battery power gauge was hesitant get up to 13.4 this morning... maybe🤷🏼‍♂️

[@bigsean131]

volvo big trucks and THANKS FOR THE QUICK RESPONSE

[@charliedynamicsllc2208]

@@volvobigtrucks8640 thanks for the answer and the person thank to.. I have a 4094 fmi 1 .. mechanic said it's the d.e.f pump but I turn the key off and hear the humming sound.

[@johntaylor7798]

If the pump is bad would that give you a scr derate? I an getting derated and when I check with computer I am not getting no code.

[@volvobigtrucks8640]

ya most of the time it wont give you a code for failed DEF pump, but will give codes for low pressure or high nox and yes that will de-rate truck

[@johntaylor7798]

@@volvobigtrucks8640 ok thanks

[@johntaylor7798]

@@volvobigtrucks8640 another question is the pump for the def a high pressure pump. We checked the pump and it's running but we are not sure if it has enough pressure?

[@volvobigtrucks8640]

Should build and hold Right around 130psi

[@ejallo4218]

Is the pump has the same pressure when running in idle and doing a regen or it has different pressure reading?

[@emirjuka]

Wher is located DEF Pump pre filter-strainer

[@volvobigtrucks8640]

it is inside of the front left black hose connector, p# 21954674

[@boris1779]

How to now pump is broken

[@volvobigtrucks8640]

A lot of the time they wont pump at all or not enough. Giving a code for low def pressure.

[@volvobigtrucks8640]

also when you turn off your truck few moments later you should hear a buzzing/humming sound that is the def pump is pulling back in the def from the nozzle, if it doesn't first thing to check fuses and battery connections

[@boris1779]

@@volvobigtrucks8640 Thanks much. I got P2047-13 change def doser and nothing changed, check battery terminal check conectors , start forced regen and def pump not build pressure ...!

[@boris1779]

@@volvobigtrucks8640 I can't find fuse for it

[@volvobigtrucks8640]

@@boris1779 there is a small wire coming off the positive post check it, clean it and check make sure wire is good on it, will post a vid for another spot to check

[@tischlerbmw21]

Those have a $550 core

[@lucianocoelho1872]

👏👏👍🤝

[@massimoferrari533]

Se la rompevi con la mazza facevi prima

[@jecte358]

You are a destroyer

[@volvobigtrucks8640]

oops.. taking them apart gives me a better idea about the part and all that good stuff, and why not share it

[@jecte358]

@@volvobigtrucks8640 haha,I do the same in China