The Turbo Air® 3000 Centrifugal Compressor Compressor Handbook

Other Required Lubricants
The user must also provide an array of other lubricant products as specified.
Specifications
Motor Bearing Lubricants
The user must provide lubricants for the main drive motor and the oil pump motor. To ensure long life
of the bearings of both motors, it is necessary to maintain both proper alignment and proper lubrication
levels at all times. The large, squirrel cage inductor motor of the Turbo Air 3000 Compressor
employs (depending on the specific type of motor used) either anti-friction bearings or sleeve bearings.
Each type of bearing has different lubrication requirements.
Refer to the motor manufacturer’s instructions provided separately for complete information
regarding correct oil bearing lubrication maintenance procedures for each type of motor.
Anti-Friction Bearings—Grease
For best results with anti-friction bearings, use grease compounded from a non-soap base and a good
grade of petroleum oil. Table 2—2 lists acceptable greases that meet those requirements.
Acceptable Motor Bearing Greases
Chevron Oil SRI #2 ®
Exxon Unirex N2 ®
Shell Oil Dolium R ®
Texaco Premium RB ®
Cooper Turbocompressor does not recommend the products of any individual grease manufacturer.
This listing constitutes neither endorsement of any product nor exclusion of comparable products
not listed.
Table 2—2 Acceptable Motor Bearing Greases
Sleeve Bearings—Oil
It is the user’s responsibility to fill the motor bearing oil reservoir and to maintain the correct oil level at
all times. When lubricating sleeve bearings, use only a high quality, petroleum-based oil with a viscosity
of 200-220 SSU at 100° F (40°C). Since motor bearings require the same type of oil as used in the
compressor itself, it is not necessary to maintain two separate supplies of oil if this type of bearing is
used.
CAUTION:
Before aligning or using this type of motor, always verify that the correct amount of oil is
in the reservoir. Motors with sleeve bearings are sometimes shipped without oil in their
reservoirs.
Drive Coupling Grease
The user must provide coupling grease at the time of installation and during compressor operation.
This coupling grease must meet very specific requirements. Conventional factory greases do not provide
complete lubrication for high-speed flexible couplings. The lithium soaps used as thickeners separate,
forcing the soaps into places that require lubrication. The soaps then act as abrasives that accelerate
wear.
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