Avoid mixing lubricants of different brands or types as they may not be compatible and the
oil mix may have inferior properties. A label, indicating the type of oil filled ex factory, is
stuck on the air receiver/oil tank.
Roto-Inject Fluid
Atlas Copco's Roto-Inject Fluid is a specially developed lubricant for use in single stage oil-injected screw
compressors. Its specific composition keeps the compressor in excellent condition. Roto-Inject Fluid can be
used for compressors operating at ambient temperatures between 0 ˚C (32 ˚F) and 40 ˚C (104 ˚F). If the
compressor is regularly operating in ambient temperatures above 35 °C (95 °F), oil lifetime is reduced
significantly. In such case it is recommended to use Roto-Xtend Duty Fluid.
Roto-Xtend Duty Fluid
Atlas Copco's Roto-Xtend Duty Fluid is a high quality synthetic lubricant for oil-injected screw compressors
which keeps the compressor in excellent condition. Because of its excellent oxidation stability, Roto-Xtend
Duty Fluid can be used for compressors operating at ambient temperatures between 0 ˚C (32 ˚F) and 46 ˚C
(115 ˚F).
Roto-Xtend Duty Fluid is the standard oil for compressors equipped with freeze protection.
Roto-Foodgrade Fluid
Special oil, delivered as an option.
Atlas Copco's Roto-Foodgrade Fluid is a unique high quality synthetic lubricant, specially created for oil-
injected screw compressors that provide air for the food industry. This lubricant keeps the compressor in
excellent condition. Roto-Foodgrade Fluid can be used for compressors operating at ambient temperatures
between 0 ˚C (32 ˚F) and 40 ˚C (104 ˚F).
9.3 Drive motor
General
Keep the outside of the electric motor clean for efficient cooling. If necessary, remove dust with a brush and/
or compressed air jet.
Bearing maintenance
The bearing at the non-drive end side is greased for life.
The bearing at the drive end side is lubricated by the oil system.
Instruction book
2920 7109 60 175
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