Volvo L220 E No power

hello dears
i have volvo L220E , the engine tends to stall while lifting the bucket
the engine was recently renewed and we change the fuel filter and separator
we also changed the fuel supply pump

any idea what can caused this problem please

Any errors displayed? Are you climbing and lifting together, just lifting, how big a bucket and how much material, what kind of material? Does it seem like its shutting off or being stalled? We need a little more to go on.

hello
it have fork for lifting marble stone around 22 Ton anf climping
it seems like shutting off

errors are in screen but the wheel loader was falling from the top of the mountain and get many damages before

The errors are to tell you what's going on, not necessarily to be ignored. For example. STOP! Reduced computer function, is a very important piece of information regarding shutdown issues. So is MID 128 SID 00X

Please advise of all scrolling errors so that we might better help you.

Thank you
this loader was fallen down long time ago from the top of the querry and most of the sensors are disconnected , it was working very good evencwith the errors
i will go and write down the errors for your advise

i take all errors some are old due to harness sensors not connected

1 . Engine Failure
2. Ecu Network reduced communication
3. low Hydraulic Oil Level
4. Low brake pressure
5. Transmission oil pressure sensor
6. Limp Home safety related failure(new error)
7. brake system failure
8. Stop Vehicle turn of Engine

also one of the technician adjusted the pressure of injectors and inlet valve by hand not by fillerGage . this i need also the adjustment

today i try with outside fuel drum connected to the filter case and cancel the fuel tank the power get better but still not strong
i think the inlet , exhaust and injector cams need adjusted

If it were valve and injector adjustment issues, it would run the same hot or cold, loaded or not. We're not there to hear how it sounds. The error "limp home" is a derate to allow you to park the machine in a safe place and correct issues.
Problems 1,2,6 & 8 are all serious issues. With reduced communication the engine, vehicle and instrument ECUs are not sharing information, they operate in default safety which is minimal. #8 is the one I suspect is shutting you down. Not a challenge to be taken lightly. At this point I would suggest reaching out to your closest dealer technician. Share all the information that you've shared with us and have a tech come out and measure your network. Without the proper equipment you could easily spend a lot on parts that may not correct your problem.
I would like to help, but I'm not getting a warm fuzzy feeling about this job, considering the circumstances.

If push comes to shove, I would investigate the instrument panel. I will find the schematics and post it up.

Thank you

it will be helpfull if you have the electric manual and sensors location to connect them back in place
also the adjustment as well for valves and injectors as i have feeling after manually adjusted it is not correct

As @funwithfuel mentioned earlier, for any further in depth information about electrics and setting of valves etc, you will need to give a serial number for the machine as there are two different engines available for that machine, the D12C E2 was in the early serial numbers then the D12D E3 in the later machines, so different settings and sensor.

hello

finally the problem sorted and i like to share what we found
connected the machine to the computer and found boost pressure sensor not reading,Replaced with new one.
the injector harness was dry and damaged under valve cover caused th cut off 2 injectors,fixed the wires now till we order new
the engine load in idel was 48 % and now dropped to 28% and the power back