Spencer Vacuum Cleaning Systems - Manual (Page 6)

6
IV. Lubrication
Instructions
For Power Mizer ® Cast Centrifugal Vacuum Producers refer to
Form WW.
Caution: Recommended bearing grease is Chevron SRI,
Number 2. Use of any other grease will void warranty.
General
Proper lubrication procedure is important to Vacuum Producer
maintenance. These instructions should be closely followed to
assure trouble-free operation of the equipment.
Standard Overhung Lubrication
Spencer’s Standard Overhung Vacuum Producers do not
require lubrication except for motor bearing lubrication required
by the motor manufacturer. See paragraph entitled Motor
Bearing Lubrication.
Four Bearing Overhung and Four Bearing Outboard Bearing
Lubrication
Spencer Four Bearing Overhung and Outboard Vacuum
Producers are equipped with deep-groove radial ball bearings
designed to carry the thrust and radial loads. These bearings
are packed with the proper amount and grade of lubricant
before the unit is shipped from the factory. For this reason,
lubrication prior to first operation is not recommended and
should not be attempted.
Bearing Lubrication Procedure and Frequency Guide
Lubrication is required based on operating frequency and condi-
tions. Many bearing failures are caused by excess grease
which results in over-heating and consequent bearing failure.
The Vacuum Producer bearings, as lubricated at the factory,
carry an adequate amount of proper grade of grease for 1500
to 8000 hours of continuous operation prior to lubrication,
depending upon atmospheric conditions and size. An average
lubrication interval therefore should be established based on
existing conditions. Several factors contribute to frequency of
lubrication:
1. Operating temperatures (bearing)
2. Indoor or outdoor operation
3. Dusty or clean atmosphere
4. Ambient temperature
5. Predicted duty cycle
6. Bearing size and speed
Assuming an ideal 8000 hour lubrication interval, reduce the
time factor by applying the preceding conditions as follows:
*Note: Higher limits apply to smaller bearings (#308 and smaller).
Lower limits apply to large bearings.
An extremely dirty atmosphere, in addition to the above factors,
could decrease the lubrication period as much as 50%.The
above chart serves only as a guide.
To lubricate blower bearings, proceed as follows:
1. Shut down machine.
2. Remove guards as necessary.
3. Inject the recommended grease (Chevron SRI No. 2) using a
grease gun. The amount of grease will vary with bearing size.
4. Reinstall guards and restart the machine.
Caution: Do not run Vacuum Producer unless guards are
properly installed.
Recommended Bearing Lubricant Type
The bearings of Four Bearing Outboard and Four Bearing
Overhung Turbo Vacuum Producers are packed at the factory
with Chevron SRI, Number 2 grease. The general specifications
are:
Grade or consistency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .#2
Thickener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .polyurea
ASTM Dropping Point . . . . . . . . . . . . . . . . . . . . . . . . . . . .480˚F
Work Penetration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .270
Base Oil Viscosity . . . . . . . . . . . . . . . . . . . . .600 SUS @ 100˚F
Color . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Blue-Green
Chevron SRI, Number 2 is available from Spencer.
Note: The intermixing of incompatible greases will result
in loss of lubrication and bearing failure which is NOT
covered under the Spencer warranty.
*Lubrication Interval
Operating Condition Blower Bearings
I. 1. 120˚F to 170˚F bearing 4000-6000 average
temperature operating hours
2. Indoor installation
3. Clean atmosphere
4. 40˚F to 100˚F ambient
temperature
5. Continuous operation
II. Same conditions as “I”, 6000-8000 average
above except: operating hours
Intermittent operation
III. 1. 120˚F to 170˚F bearing 3000-5000 average
temperature operating hours
2. Outdoor installation
3. All atmosphere
conditions
4. 0˚F to +120˚F ambient
temperature
5. Continuous operation
IV. Same conditions as “III”, 5000-7000 average
above except: operating hours
Intermittent operation