suspension spheres as the name suggests are hollow metal spherical containers used in a hydraulic suspension system. They work by using pressurised nitrogen gas and hydraulic fluid or LHM (A mineral oil) which is separated by a damper valve inside. Nitrogen gas is used because it will not cause corrosion to the sphere. The hydraulic fluid/mineral oil section is connected to the car’s hydraulic system which pressurises the fluid. When driving the nitrogen gas creates pressure on the hydraulic fluid/oil below and is compressed during the movement of the vehicle.
The suspension spheres operate in a similar way to the conventional spring suspension system and are situated in the same location.
Signs that a suspension sphere needs replacing can include vibration through the steering wheel, excessive bounce or that the suspension feels solid or making clunking noises. These issues are usually caused by a loss of nitrogen gas through use. More modern suspension spheres have addressed this issue by including multiple membranes to their spheres to help limit gas losses. In some cases it’s possible to correct the gas issue temporarily by using a portable gas suspension pump such as the Hydragas suspension pump.