Need help with Volvo l220H accumulator charging procedure.

[jonathan Morris]

I'm chasing down a hydraulic issue on our Volvo L220H, and I'm starting to suspect the accumulator may not be charged correctly. The loader feels fine during cold start, but after running for a while, the hydraulics start feeling sluggish and less responsive, especially during repeated lift cycles.

Before I start tearing into things, I wanted to ask if anyone here has the proper accumulator charging procedure for the L220H. I've worked on smaller loaders before, but I know these Volvo systems can be picky when it comes to nitrogen charge pressure and depressurizing the system safely.

 

[Theoeni1]

Sounds like the accumulator is worth checking.
Cold start being fine is interesting.
Could be pressure dropping once hot.
Make sure to depressurize safely first.
Hope someone has the exact procedure.

 

[zernish308]

Shut the machine down completely and release all hydraulic pressure first. Use only dry nitrogen with a charging kit to check and adjust the accumulator pressure, then recheck for leaks after charging.

 

[Fairy]

This seems to me to be one of those situations where the accumulator should certainly be examined before going further. If the hydraulics operate well in cold weather but become sluggish in warmer weather, then either the nitrogen charge is too low, or the accumulator itself is failing.

Before doing anything else, be sure to fully depressurize the system, and use only dried nitrogen for the charge. I would also check the pilot pressure and oil temperature, as well as checking the function of the pump under heat.

 

[mdsawkathossenraihan]

Had something similar on an L180 a while back. Machine felt fine cold, then got lazy once the oil warmed up. Turned out the accumulator charge was way lower than spec. Definitely worth checking before tearing deeper into the hydraulics.