piston or bladder types make a difference too. you are not supposed to bottom out a bladder type and piston types are sometimes rebuildable. usually you install them vertically with the fitting at the bottom so that any debris in the system does not wear out the seals constantly
I have two on the loader, one set to dampen unloaded (that one bottoms out when loaded) and one set to dampen when close to full capacity. then I have one on my 3 pt hitch all are piston type.
I used a gauge to get the hydraulic system pressures before buying the accumulators and talked to a hydraulic shop that does a lot of these and discussed the charge settings. it is a certain percentage of the hydraulic system that is the ideal charge setting. If you do the math I end up somewhere around 60% of the working pressure as a charge setting when loaded. except for the max load because I wouldn't really go far with a max load in the loader so I set the system with teh most common load which would be a bucket full of material.
my empty loader pressures are 500psi no bucket, 700PSI with empty bucket, grapple empty is 800, bucket full of damp dirt 1200 forks empty 600PSI and my max lift pressure is 2400PSI. I know My pump is a little weak but thats all she's got in her. For now the pump replacement is on the back burner. it still works well and hasn't gotten worse.
loader accumulator charged at 300psi and 800 psi. works great,
3pt set to 700psi works well with my 1200 lbs blower, has maybe just a little too much bounce maybe I would try 800 next time.
these are settings on a grand
L4740 with a la854 loader and they seem to work well with my attachments. definitely a great mod makes the ride a lot smoother even though I don't road my tractor often I do have a lot of trails in the woods.