LE Almasol® Pure Mineral Gear Lubricant 401

Provides Exceptional Gear Protection without EP Additive

LE Monolec Synthetic Gear Oil 9919 & 9923 Info LE’s Almasol® Pure Mineral Gear Lubricant (401) is a balanced formulation of base oil, rust and oxidation inhibitors, wear-reducing agents, and other additives that provides the highest level of protection possible without the inclusion of an extreme pressure additive. When transmission and gearbox manufacturers specify a “pure” or “straight” mineral oil gear oil, it should not contain a chemically active EP agent; other additives, however, are still acceptable for inclusion. In addition to other highly desirable additives, the Almasol 401 formulation contains Almasol, LE’s exclusive wear-reducing additive that protects against premature wear and shields metal against corrosive attack.

LE’s proprietary additives are used exclusively in LE lubricants. Almasol® Pure Mineral Gear Lubricant contains Almasol. Almasol® solid wear-reducing additive is able to withstand extremely heavy loads, chemical attack and temperatures up to 1,900°F (1,038°C). It is attracted to metal surfaces, forming a microscopic layer but not building on itself or affecting clearances. Almasol minimizes metal-to-metal contact and the resulting friction, heat and wear

Beneficial Qualities

Longer Gear Life

  • Reduces wear with excellent film strength, lubricity and wear-reducing additives
  • Climbs gears immediately at startup, assuring immediate lubrication
  • Stays in place, even after equipment remains idle for extended periods
  • Reduces operating temperatures over ordinary gear oils

Longer Oil Life

  • Withstands elevated temperatures without oxidizing and forming sludge
  • Resists formation of rust and corrosive acids that can result from moisture
  • Is nonfoaming in service

Lower Operating Costs

  • Ensures longer gear and lubricant life
  • Reduces downtime
  • Reduces expenses for labor and parts
  • Does not affect seals

Available Grades

  • ISO 220 / SAE 110

Important Note

  • Not for use where GL-4 or GL-5 fluids are recommended
  • Not for use in automatic, semi-automatic or hydraulic transmissions, or in common sump systems combining gear lubricant, hydraulic oil and power steering fluid

Performance Requirements Met or Exceeded

  • API GL-1
  • USDA H2
LE Almasol® Pure Mineral Gear Lubricant 401 Info

Typical Applications:

  • Transmissions requiring a pure mineral oil or GL-1 gear oil
  • Standard truck transmissions, including Road Ranger, that do not use EP gear oils, including some dump trucks and bulk feed trucks
  • In place of SAE 50 engine oil in transmissions, final drives, etc.
  • Power takeoff systems
  • Snow cat machines (as hub oil)
  • Gearboxes requiring a pure mineral oil or an R&O non-EP gear oil
  • Vacuum pumps


We'll do everything we can to insure you get the best solution for your application!