LUBRICATING OIL COMPOSITIONS FOR CONSTRUSTION MACHINES

摘要

The present invention is directed to a Zinc-free transmission oil composition for construction machinery comprising:
(i) a major amount of an oil of lubricating viscosity,(ii) at least 0.25 wt. % of a dithiophosphorylated carboxylic acid compound, and(iii) a succinimide dispersant derived from a polyisobutylene group of 1200 molecular weight or less.;Also provided is a method for lubricating the transmission of a construction machine comprising lubricating the transmission with a Zinc-free transmission oil composition comprising:
(i) a major amount of an oil of lubricating viscosity,(ii) at least 0.25 wt. % of a dithiophosphorylated carboxylic acid compound, anda succinimide dispersant derived from a polyisobutylene group of 1200 molecular weight or less.

主权项

1. A Zinc-free transmission oil composition for construction machinery comprising:
(a) a major amount of an oil of lubricating viscosity, (b) at least 0.25 wt. % of a dithiophosphorylated carboxylic acid compound, and (c) a succinimide dispersant derived from a polyisobutylene group of 1200 molecular weight or less.