Abstract: An energy conservation system for an earth-moving loading machine is comprised of one or more pressurized gaseous pistons that extend from the front of the frame of a loading machine to the boom assembly. Although this piston does not provide sufficient force to maintain the boom assembly in a raised position, a portion of the weight of the boom assembly and associated payload is always supported by the piston. This energy conservation system thus decreases the hydraulic horsepower needed to raise and lower the boom assembly and payload, or, in the alternative, decreases the cycle time required to raise and lower the boom assembly. The energy conservation system of the present invention into a loading machine also allows for a more controlled lowering of the boom assembly.