Super Gear Lube 239S

Schaeffer’s Oil 239S Super Gear Lube is a premium quality fluid that is specially formulated for use in the lubrication of the drive-train and hydraulic systems of front end loaders, haul trucks, bulldozers and other crawler tractor type equipment common to the construction and mining industries that call for the use of a quality oil.

Today’s drive-trains are becoming more complex in design and are using more advanced high tech materials to improve power transfer. As a result they require fluids that are formulated specifically to optimize friction performance, wear protection, material compatibility and oxidation stability. Because of these aspects the lubricants that are used in this application must be specially formulated to meet and exceed these requirements in order to maximize the life of the friction discs in the powershift transmissions, provide smoother operation and shift handling, reduce wear and maximize equipment life.

These are the driving forces behind the Caterpillar specifications outlining requirements on elastomer seal compatibility, oxidation stability, wear performance and friction properties for fluids used in powershift transmissions, final drives and hydraulic systems. These specs are aimed at improving the performance over that of automatic transmission fluids, universal tractor transmission hydraulic fluids and CD/TO-2 fluids that were previously used in these applications.

Avoid the Wrong Additive Systems

One of the keys to the smooth operation of powershift transmission fluids is the additive used. The use of the wrong type can result in an attack on nonmetallic components, altering the static and dynamic coefficients of friction needed to operate the components properly. The stick/slip and noise in the powershift transmission can suffer. And there’s a potential safety threat with wet brakes used for parking. A stick/slip phenomenon is known to occur in units parked on an incline in which they continue to move at a barely detectable speed.

The Schaeffer Solution

Super Lube is blended from the finest solvent refined severely hydro-finished 100% pure paraffin base oils available. These severely solvent refined severely hyro-finished 100% pure paraffin base oils provide the Super Lube with superior oxidation resistance and thermal stability.

Blended into these 100% pure paraffin base oils is a very specialized non-corrosive high tech additive package that provides excellent wear protection and material compatibility while maximizing equipment life. This specialized high tech additive package allows the Super Lube to provide the following performance benefits:

  • Stable and controlled friction performance with various metallic and non-metallic friction materials that are used in powershift transmissions. This results in the elimination of problems with excessive noise, weakening of the bindings in paper materials, and embrittlement of elastomeric materials.
  • Elimination of clutch slippage even under heavy loads on steep inclines.
  • Elimination of the need to constantly adjust equipment in order to maintain a proper clutch setting.
  • Excellent oxidative and thermal stability in order to prevent and eliminate the formation of sludge and varnished that can damage seals and elastomeric clutch materials.
  • Excellent wear protection.
  • Excellent compatibility with all types of seal and elastomeric materials commonly used in powershift transmissions.
  • Excellent stay-in-grade performance and shear stability in order to provide long term anti-wear protection and sustained applied pressure. Super Lube does not contain any viscosity index improvers.
  • Superior protection against copper corrosion and rust.
  • Very good low temperature fluidity in order to provide easier cold weather starting and better wear protection under these conditions.
  • Excellent protection against foaming. This ensures that no air can become entrained into the fluid that could lead to metal-to-metal contact and wear.
  • Longer drain intervals.
  • Less downtime and longer trouble free equipment life and operation.

Further blended into the 100% pure paraffin base stocks and this highly specialized additive package is Micron Moly®. Micron Moly® is a liquid soluble type of moly that plates itself to the metal surfaces of the various components, thus forming a solid lubricant film that is able to withstand pressures up to 500,000 lbs per square inch. This translates into better wear protection for the metallic components of the powershift transmission and for the hydraulic system, thus extending operating life and providing an extra margin of safety for service.

Super Lube can also be used in Allison transmissions that call for a C-4 type fluid and the hydraulic system of front end loaders, haul trucks, bulldozers and other crawler tractor type equipment common to the construction and mining industries.

Super Lube meets and exceeds the following specifications: API Service Classifications GL-1, GL-2 and GL-3 Caterpillar TO-4, Allison C-4 and Komatsu KES 07.802, ZF TE-ML 03 Off Highway Powershift Transmissions Specification, Eaton/Fuller and Spicer Transmission Lubrication Specifications and Sperry Vickers M2950S.

This oil is specially formulated for use in powershift transmissions. Do not use in diesel engines. Shortened engine life could result due to heavy piston deposits.


#239A Super Lube is available in:

410 lb. drums
225 drums
037 lb. pails