Wheel and shaft maintenance, Structural maintenance, Warning – Twin City TSL & QSL; Inline Centrifugal and Mixed Flow Fans - ES-895 User Manual
Page 3: Twin city engineering supplement 895 3
Twin City Engineering Supplement 895
3
Wheel and Shaft Maintenance
Periodically inspect the shaft and wheel for dirt buildup,
corrosion, and signs of excess stress or fatigue. Clean
the components. If the wheel is removed for any reason,
make sure that it is securely attached to the shaft before
restarting the fan.
Structural Maintenance
All structural components or devices used to support or
attach the fan to a structure should be checked at
regular intervals. Vibration isolators, bolts, foundations,
etc., are all subject to failure from corrosion, erosion,
and other causes. Improper mounting can lead to poor
operation characteristics or fan fatigue and failure. Check
metallic components for corrosion, cracks, or other signs
of stress. Concrete should be checked to insure the
structural integrity of the foundation.
WARNING
1. This equipment must not be operated without proper guarding of
all moving parts. While performing maintenance be sure remote
power switches are locked off. See installation manual for recom-
mended safety practices.
2. Before starting: Check all setscrews for tightness and rotate wheel
by hand to make sure it has not moved in transit.
* Suggested lubrication interval under ideal continuous operating condi-
tions. Relubricate while running, if safety permits, until some purging
occurs at seals. Adjust lubrication frequency depending on conditions
of purged grease. Use one-half of listed interval for vertical shaft appli-
cations or for 24 hour operation. Hours of operation, temperature, and
surrounding conditions will affect the relubrication frequency required.
1. Lubricate with a high quality NLGI No. 2 lithium-base grease hav-
ing rust inhibitors and antioxidant additives, and a minimum oil
viscosity of 500 SUS at 100°F (38°C). Some greases having these
properties are:
Shell - Gadus S2 V100 2
Exxon - Ronex MP
Mobil - Mobilith SHC100
Mobil - Mobilith SHC220
2. Lubricate bearings prior to extended shutdown or storage and
rotate shaft monthly to aid corrosion protection.
Figure 2. Safety & Lubrication Instructions for Fans
with Ball Bearings
Relubrication Schedule (Months)*
Ball Bearing Pillow Blocks
Speed (RPM)
Shaft DIA
500 1000 1500 2000 2500 3000 3500 4000 4500
1
⁄
2
" thru 1
11
⁄
16
"
6
6
5
3
3
2
2
2
1
(13 – 45)
1
15
⁄
16
" thru 2
7
⁄
16
"
6
5
4
2
2
1
1
1
1
(50 – 60)
2
11
⁄
16
" thru 2
15
⁄
16
"
5
4
3
2
1
1
1
(65 – 75)
3
7
⁄
16
" thru 3
15
⁄
16
"
4
3
2
1
1
(80 – 100)
WARNING
1. This equipment must not be operated without proper guarding of
all moving parts. While performing maintenance be sure remote
power switches are locked off. See installation manual for recom-
mended safety practices.
2. Before starting: Check all setscrews for tightness and rotate wheel
by hand to make sure it has not moved in transit.
* Suggested lubrication interval under ideal continuous operating condi-
tions. Relubricate while running, if safety permits, until some purging
occurs at seals. Adjust lubrication frequency depending on conditions
of purged grease. Use one-half of listed interval for vertical shaft appli-
cations or for 24 hour operation. Hours of operation, temperature, and
surrounding conditions will affect the relubrication frequency required.
1. Lubricate with a high quality NLGI No. 2 lithium-base grease hav-
ing rust inhibitors and antioxidant additives, and a minimum oil
viscosity of 500 SUS at 100°F (38°C). Some greases having these
properties are:
Shell - Gadus S2 V100 2
Exxon - Ronex MP
Mobil - Mobilith SHC100
Mobil - Mobilith SHC220
2. Lubricate bearings prior to extended shutdown or storage and
rotate shaft monthly to aid corrosion protection.
Relubrication Schedule (Months)*
Spherical Roller Bearing - Solid Pillow Blocks
Speed (RPM)
Shaft DIA
500 1000 1500 2000 2500 3000 3500 4000 4500
1" thru 1
7
⁄
16
"
6
4
4
2
1
1
1
1
1
⁄
2
(25 – 35)
1
11
⁄
16
" thru 2
3
⁄
16
"
4
2
1
1
⁄
2
1
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
1
⁄
2
(40 – 55)
2
7
⁄
16
" thru 3
7
⁄
16
"
3
1
1
⁄
2
1
1
⁄
2
1
⁄
2
1
⁄
4
1
⁄
4
(60 – 85)
3
15
⁄
16
" thru 4
15
⁄
16
"
2
1
⁄
2
1
1
⁄
2
1
⁄
4
(90 – 125)
Figure 3. Safety & Lubrication Instructions for Fans
with Unit Roller Bearings
Figure 4. Safety & Lubrication Instructions for Fans
with Spherical Roller Bearings with Split Pillow
Block Housings
WARNING
1. This equipment must not be operated without proper guarding of
all moving parts. While performing maintenance be sure remote
power switches are locked off. See installation manual for recom-
mended safety practices.
2. Before starting: Check all setscrews for tightness, and rotate wheel
by hand to make sure it has not moved in transit.
*Suggested lubrication interval under ideal continuous operating condi-
tions. Remove bearing cap and observe condition of used grease after
lubricating. Adjust lubrication frequency as needed. Use one-half of
listed interval for vertical shaft applications or for 24 hour operation.
Hours of operation, temperature, and surrounding conditions will affect
the relubrication frequency required. Clean and repack bearings annu-
ally. Remove old grease, pack bearing full and fill housing reservoir
on both sides of bearings to bottom of shaft.
1. Lubricate with a high quality NLGI No. 2 lithium-base grease hav-
ing rust inhibitors and antioxidant additives, and a minimum oil
viscosity of 500 SUS at 100°F (38°C). Some greases having these
properties are:
Shell - Gadus S2 V100 2
Exxon - Ronex MP
Mobil - Mobilith SHC100
Mobil - Mobilith SHC220
2. Lubricate bearings prior to extended shutdown or storage and
rotate shaft monthly to aid corrosion protection.
3. Purge or remove old grease when changing lubrication brands or
types.
Static Oil Lubrication
1. Use only high quality mineral oil with a VG grade indicated on the
customer submittal drawing.
2. Static oil level should be at the center of the lower-most roller
(Do not overfill.)
3. Complete lubrication change should be made annually.
Relubrication Schedule (Months)*
Spherical Roller Bearing - Split Pillow Blocks
Speed (RPM)
Shaft DIA
500
750 1000 1500 2000 2500 3000 3500 4000
1
7
⁄
16
" thru 1
15
⁄
16
"
6
4
1
⁄
2
4
4
3
1
⁄
2
2
1
⁄
2
2
1
⁄
2
1
1 0.50 oz.
(35 – 50)
2
3
⁄
16
" thru 2
13
⁄
16
"
5
4
1
⁄
2
4
2
1
⁄
2
2
1
⁄
2
1
1
⁄
2
1
⁄
2
1
⁄
4
1
⁄
4
0.75 oz.
(55 – 70)
2
15
⁄
16
" thru 3
15
⁄
16
"
4
1
⁄
2
4
3
1
⁄
2
2
1
⁄
2
1
1
⁄
2
1
1
⁄
2
2.00 oz.
(75 – 100)
4
7
⁄
16
" thru 4
15
⁄
16
"
4
4
2
1
⁄
2
1
1
⁄
2
4.00 oz.
(110 – 135)
5
7
⁄
16
" thru 6
15
⁄
16
"
4
2
1
⁄
2
1
1
⁄
2
7.00 oz.
(140 – 180)
Grease
to be
added at
each
interval