Shell OMALA S4 WE

Advanced synthetic gear oil

Former product name: Shell Tivela S

Shell Omala S4 WE is an advanced synthetic industrial gear oil for use in heavily loaded worm gears. The formulation based on a polyalkyl glycol (PAG) base and an excellent package of enriching additives provides excellent operating properties in difficult operating conditions, ensuring energy savings, reduced friction, extended drain intervals and high resistance to micro-pitting.

Application:

• Closed industrial worm gears

Shell Omala S4 WE is recommended for worm gears operating under severe conditions, i.e. heavy loads, very low or high operating temperatures, large temperature fluctuations.

• Systems with extended service intervals

Shell Omala S4 WE is recommended for equipment operating in severe conditions where oil changes are infrequent and long drain intervals are required and where accessibility is difficult (e.g. wind turbine gearboxes).

• Other uses

Features and benefits

• Long replacement intervals - lower maintenance costs

• Excellent wear protection

Shell Omala S4 WE has excellent load carrying capacity, ensuring excellent component durability even under impact conditions. It also protects against
occurrence of the "micro-pitting" phenomenon. These properties give it a major advantage over mineral lubricants in terms of gear and bearing life.

• Efficient operation of systems

Technical parameters

Viscosity versus temperature graph for Shell Omala s4 EC Oil

Specifications and approvals

• DIN 51517-3 (CLP)
• Approved by Bonfiglioli

Compatibility and mixability

• Compatibility with seals and paints

It is recommended to use high quality epoxy paints as well as other polyalkylglycol resistant paints.

Shell Omala S4 WE is excellent for nitrile and Viton seals. However, Viton seals are preferred.

Replacement procedure

Shell Omala S4 WE contains a polyalkylene glycol (PAG) base which is incompatible with mineral oil and other synthetic oils. When replacing this type of oil with Omala S4 WE oil, a special replacement procedure should be used and remember about the lack of miscibility and other oil bases.

Prior to a full replacement, the transmission system should be flushed with a minimum amount of Shell Omala S4 WE oil by running the system at no load until warm, then the warm oil must be purged from the system.

Mineral oil seals should be removed and replaced with PAG compatible seals. Inspection of the system after replacement should take place after a few days
use to check the cleanliness of the oil and contamination of the system.

Shell Omala S4 WE is also immiscible with some other polyalkylene glycol fluids, care should be taken when topping up the oil system.

Work safety and environmental protection

The product does not pose a direct threat to health and safety during its correct use in accordance with its intended purpose and with personal hygiene.