ROTOR GP-GENERATOR 2548680 - Caterpillar

Condemning Limits
1. Viscosity of the used oil must not have increased by more than 3 cSt at 100°C (212°F) when compared to new oil viscosity.2. The percent of solids or insolubles must not be more than 1% by ASTM D-893.Differential infrared analysis of used oil must not exceed the following absorbance/CM-1.
1. The maximum for oxidation is 20 Absorbance/CM-1 at a wave number of 1710.2. The maximum for nitration is 20 Absorbance/CM-1 at a wave number of 1630.If analysis of the used oil at the recommended oil change interval exceeds the condemning limits, the following courses of action can be taken.
1. Modify the jacket water temperature and/or adjust the air to fuel ratio to minimize the oil degradation rate.2. Work with your oil supplier to arrive at an oil that will not exceed the limits.