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FAN BEARINGS:

1.

Units are prelubricated with lithium base NLGI #2 grade grease, but make

sure they have adequate grease. As a precaution, if equipment is to be built

and left idle for any period of time prior to actual use, the units should be

filled 100% full to provide maximum protection from corrosion, etc. The

suggested relubrication schedule above is a general guide.

The specific conditions on an application such as exact hours of operation,

temperature, moisture, speed and dirt govern the required lubrication cycle.

This can be determined by inspection of the flushed out lubricant during a

trial period of operation. Add grease slowly. Use a sufficient volume to purge

bearing seals of old lubricant. It is preferable to rotate bearings during

relubrication where good safety practice permits.

Inspect bearing installations at least every six months. Any unusual

noise or vibration change should be immediately investigated.

2. Bearing must be properly locked to the shaft. Check before operation.

Make sure bearing locking collar is in position and set screws are tightened

to the bearing manufacturer’s recommended torque levels. See bearing

manufacturer’s instructions enclosed for details. The bearing set screws

should be re-torqued after eight and twenty-four hours of operation.

VERTICAL OPERATION:

If the fan is to operate with its shaft vertical, reset the bearings as

follows:

a. With the shaft vertical, unlock the drive end bearing set screws

and turn the shaft by hand. This allows the wheel end bearing to

take the gravity load of the shaft and wheel.

b. Re-lock the drive end bearing locking device and replace and torque set

screws as required by the bearing manufacturer’s instructions so that

this bearing now takes only the belt pull.

V-BELT DRIVES:

1. Alignment of the drives must be checked with a straightedge or string.

Belt tension must must be properly adjusted to assure good belt and

bearing life. Sheave faces should be parallel and aligned within 1/16".

Use balanced sheaves.

2. With all belts in their proper grooves, adjust the centers to take up all

slack and until the belts are fairly taut.

3. It is normal on v-belt drives handling more than 20 HP to “squeal” on

start-up.

Do not tighten belts too tight.

Normal belt tension can be

determined by being able to depress belt, at mid-point a distance

equal to one belt width, with normal finger pressure.

4. After a few days of operation the belts will seat themselves in the

sheave grooves and it may become necessary to readjust so that the

drive again shows a slight “bow” in the slack side. The drive is now

properly tensioned and should operate satisfactorily with only an

occasional readjustment to compensate for belt and groove wear.

BEARING LUBRICATION

Light to

Medium

Light to

Medium

Light to

Medium

Light to

Heavy

Heavy to

Very Heavy

Light

Light to

Heavy

Light to

Medium

Light

Clean

Moderate

to Dirty

Extreme

Dirt

Clean to

Moderate

Clean to

Dirty

Dry

Dry

Dry

High

Humidity -

Direct

Water

Splash*

Possible

Frost

Dry

Dry

Slow to

Medium

Slow to

Medium

Slow to

Medium

Slow to

Medium

Slow

High

Speed

Slow to

Medium

Slow to

Medium

Slow

0

120

0

120

0

32

0

– 20

100

– 65

80

80

120

200

120

200

200

200

200

120

200

250

250

300

2 to 6 Months

1 to 2 Months

1 to 4 Weeks

1 to 7 Days

Daily -

Flushing Out Dirt

1 to 4 Weeks -

Grease at Shutdown

1 to 8 Weeks

1 to 8 Weeks

1 to 8 Weeks

1 to 4 Weeks -

Grease at Shutdown

1 to 8 Weeks

1 to 4 Weeks

High quality NLGI #1 or #2 multi-purpose

bearing greases are generally satisfactory.

Consultation with a reputable lubricant

supplier is recommended.

Mobil Oil Corporation, Mobilith AW-2

Texaco Inc., Premium RB2

Shell Oil Company, Gadus S2 V220

Shell Oil Company, Gadus S2 V220

Mobil Oil Corporation, Mobiltemp 78

Amoco, Rykon No. 2

Texaco Inc., Premium RB 2

Mobil Oil Corporation, Mobiltemp SHC32

Texaco Inc., 2346EP Low Temp

Shell Oil Company, Aeroshell 7A

Union Oil Company, Unoba EP2

Mobil Oil Corporation Mobiltemp 78

Keystone Lubricants Company, No. 89

Dow Chemical Company, DC44

AMBIENT

CONDITIONS

OPERATING

CONDITIONS

BEARING OPERATING

TEMPERATURE (°F)

SUGGESTED

GREASING INTERVAL**

USE THESE GREASES

or EQUIVALENT

* Additional bearing protection or special sealing may be required.

** Suggested starting interval for maintenance program. Check grease condi-

tion for oiliness and dirt and adjust greasing frequency accordingly. Watch

operating temperatures. Sudden rises may show need for grease or indicate

over lubrication on higher speed applications.

Dirt

Moisture Load Speed

Low High

Chicago Blower Corporation cannot be held responsible for performance of

individual batches of grease. Changes in lubricant specifications, performance,

and lubricant guarantees are the responsibility of the lubricant manufacturer.