Question

[Spiders]

I know the cylinders hold air pressure at 120 psi, so is it per cyclinder? saying that two is holding 240, and four holding 480 combined? or is it just 120, if so whats the point of four?

[seanl]

when you put them in parallel you end up with still the same psi(120) but more capacity.

[Miner]

I know the cylinders hold air pressure at 120 psi, so is it per cyclinder? saying that two is holding 240, and four holding 480 combined? or is it just 120, if so whats the point of four?

By cylinders, do you mean the actuators (pistons) or the accumulators (hold the air?

[Spiders]

accumulators

[Miner]

Then yes, seanl was correct.