Shell Spirax S4 CX 30
Shell Spirax S4 CX 30 is a high-performance transmission and hydraulic oil specifically developed for heavy-duty off-highway equipment. Formulated with high-quality base oils and advanced additive technology, the lubricant is designed to deliver reliable protection and smooth performance in transmissions, final drives, oil-immersed brake systems and hydraulic systems. The oil supports dependable operation of critical equipment components and helps maintain long-term reliability in demanding operating environments.
One of the key advantages of Shell Spirax S4 CX 30 is its excellent friction performance and compatibility with modern friction materials. Off-highway equipment often uses advanced metallic and non-metallic friction materials within powershift transmissions and wet brake systems. The lubricant provides consistent friction characteristics, helping minimise clutch slippage while delivering smooth, quiet brake operation. This ensures reliable transmission engagement and dependable braking performance during heavy-duty equipment operation.
Shell Spirax S4 CX 30 also delivers excellent anti-wear protection for critical mechanical components. The shear-stable SAE 30 formulation does not rely on viscosity index improvers or thickeners, which helps maintain stable viscosity and strong film strength under high loads. This allows the lubricant to protect heavily loaded gears, bearings and hydraulic pumps from wear and surface damage. The result is extended component life and improved reliability for off-highway machinery operating under severe conditions.
Another important benefit of Shell Spirax S4 CX 30 is its effective low-temperature performance. The formulation meets low-temperature viscosity and fluidity requirements, ensuring the oil circulates efficiently during cold start conditions. Rapid oil flow helps provide early protection for critical transmission and hydraulic components, reducing the risk of wear during start-up and improving machine efficiency in colder operating environments.
Shell Spirax S4 CX 30 also offers excellent oxidation stability and deposit control. The oil contains oxidation inhibitors that help prevent lubricant degradation during high temperature operation. This helps maintain oil cleanliness, suppress foaming and protect both ferrous and non-ferrous metal components from corrosion. These characteristics contribute to longer oil life and consistent equipment performance over extended operating intervals.
The lubricant is recommended for use in heavy-duty off-highway equipment produced by leading manufacturers including Caterpillar, Komatsu and Komatsu-Dresser. It is suitable for use in powershift transmissions, final drives, oil-immersed brake systems and hydraulic systems, as well as transmissions manufactured by Eaton, Eaton Fuller, ZF, Dana and Rockwell. The product meets key industry specifications including Caterpillar TO-4, ZF TE-ML 03C and 07F and DANA-OHTM-TO-30. It is also suitable for applications requiring Allison C-4 type fluids. Physical characteristics include a kinematic viscosity of approximately 93.9 mm²/s at 40°C and 10.9 mm²/s at 100°C with a density of approximately 899 kg/m³ at 15°C. The oil has a flash point of approximately 205°C and a pour point of approximately –30°C, supporting reliable lubrication performance across demanding off-highway operating conditions.
