CAMCORP SWF with Externally Mounted Fan - Manual (Page 44)

COMMON FAN PROBLEMS
Lubrication
Use the table for relubrication scheduling according to operat-
ing speed and shaft diameter. Bearings should be lubricated
with a premium quality lithium-based grease conforming to
NLGI Grade 2. Examples are:
Mobil - Mobilith AW2 Chevron - Amolith #2
Texaco - Premium RB Shell - Alvania #2
These greases are for bearing surface temperatures of 40°F. to
180°F. For surface temperatures of 181°F. to 230°F. use
Mobilith SHC220.
Do not use “high temperature” greases, as many are not for-
mulated to be compatible with fan bearings.
Add grease to the bearing while running the fan or rotating the
shaft by hand. Be sure all guards are in place if lubrication is
performed while the fan is operating. Add just enough grease to
cause a slight purging at the seals. Except on split pillowblocks.
Completely filled bearings will run hotter until a sufficient
amount of grease is purged out of the seals.
Split pillowblock bearings (Link-Belt P-LB6800 & P-LB6900,
SKF SAF 22500, Dodge SAF-XT) should be cleaned and
repacked at approximately every eighth lubrication interval.
This requires removal of the bearing cap. Clean out old grease
and repack the bearing with fresh grease. Pack the bearing fully
and fill the housing reservoir to the bottom of the shaft on both
sides of the bearing. Replace the bearing cap, being careful not
to mix caps as they are not interchangeable from one bearing
to another. Do not over lubricate.
BEARING LUBRICATION INTERVAL [months]
RPM 1 - 501- 1001- 1501- 2001- 2501- 3001- 3501-
Shaft 500 1000 1500 2000 2500 3000 3500 4000
6 6 5-6 4-6 4-6 3-5 2-4 2-4
1 7/16
6 4 4 2 2 1 1 1
6 6 4-6 4-6 2-4 2-4 2 1-2
1 11/16
6 4 2 1 1 1 1-2 1-2
2 3/16 6 4-6 4 2-4 2 --
2 7/16 6 4-6 4 2-4 2 --
2 15/16 4-6 4-6 2-4 2 1-2 --
Ball Bearings & Split Non- Split Pillowblock
Split Pillowblock Spherical Roller Bearings
Spherical Roler Bearings
NOTE:
1.
These are general recommendations only; specific
manufacturer’s recommendations may vary slightly.
2. Assumes clean environment, -20°F. to 120°F.
a. Consult The New York Blower Company for
operation below -20°F. ambient.
b. Ambient temperatures greater than 120°F.
will shorten bearing life.
c. Under extremely dirty conditions, lubricate
more frequently.
3. Assumes horizontal mounting configuration. For verti-
cally mounted applications, lubricate twice as frequently.
Excessive Vibration
A common complaint regarding industrial fans is “excessive
vibration”. nyb is careful to ensure that each unit is precisely
balanced prior to shipment; however, there are many other
causes of vibration including:
1. Loose mounting bolts, setscrews, bearings or couplings.
2. Misalignment or excessive wear of couplings or bearings.
3. Misaligned or unbalanced motor.
4. Bent shaft due to mishandling or material impact.
5. Accumulation of foreign material on the wheel.
6. Excessive wear or erosion of the wheel.
7. Excessive system pressure or restriction of airflow due to
closed dampers.
8. Inadequate structural support, mounting procedures or
materials.
9. Externally transmitted vibration.
Inadequate Performance
1. Incorrect testing procedures or calculations.
2. Fan running too slowly.
3. Fan wheel rotating in wrong direction or installed back-
wards on shaft.
4. Wheel not properly centered relative to inlet cone.
5. Damaged or incorrectly installed cut off sheet or diverter.
6. Poor system design, closed dampers, air leaks, clogged
filters, or coils.
7. Obstructions or sharp elbows near inlets.
8. Sharp deflection of airstream at fan outlet.
Excessive Noise
1. Fan operating near “stall” due to incorrect system design
or installation.
2. Vibration originating elsewhere in the system.
3. System resonance or pulsation.
4. Improper location or orientation of fan intake and dis-
charge.
5. Inadequate or faulty design of supporting structures.
6. Nearby sound reflecting surfaces.
7. Loose accessories or components.
8. Loose drive belts.
9. Worn bearings.
Premature Component Failure
1. Prolonged or major vibration.
2. Inadequate or improper maintenance.
3. Abrasive or corrosive elements in the airstream or sur-
rounding environment.
4. Misalignment or physical damage to rotating components
or bearings.
5. Bearing failure from incorrect or contaminated lubricant or
grounding through the bearings while arc welding.
6. Excessive fan speed.
7. Extreme ambient or airstream temperatures.
8. Improper belt tension.
9. Improper tightening of wheel setscrews.
REPLACEMENT PARTS
It is recommended that only factory-supplied replacement parts
be used. nyb fan parts are built to be fully compatible with the
original fan, using specific alloys and tolerances. These parts
carry a standard nyb warranty.
When ordering replacement parts, specify the part name, nyb
shop and control number, fan size, type, rotation (viewed from
drive end), arrangement and bearing size or bore. Most of this
information is on the metal nameplate attached to the fan base.
For assistance in selecting replacement parts, contact your
local nyb representative or visit: http://www.nyb.com.
Example: Part required: Wheel/shaft assembly
Shop/control number: B-10106-100
Fan description: Size 2206A10 Pressure Blower
Rotation: Clockwise
Arrangement: 4
Suggested replacement parts include:
Wheel Component parts: Damper
Shaft
●
Motor
Bearings* Coupling*
Shaft Seal* Sheaves*
V-Belts*
● For Arrangement 1/8 fan only.
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