COOK CF Series Installatie-, Bedienings- en Onderhoudshandleiding - Pagina 7
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Motor Bearings
Motors are provided with prelubricated bearings. Any lubrica-
tion instructions shown on the motor nameplate supersede in-
structions below. Motor bearings without provisions for relubri-
cation will operate up to 10 years under normal conditions with
no maintenance. In severe applications, high temperatures or
excessive contaminates, it is advisable to have the maintenance
department disassemble and lubricate the bearings after three
years of operation to prevent interruption of service.
For motors with provisions for relubrication, follow intervals of
the table below.
Relubrication Intervals
Up to and
Service
Including 184T
Conditions
1800
Over
RPM &
1800
Less
RPM
Standard
3 yrs.
6 months
Severe
1 yr.
3 months
Motors are provided with a polyurea mineral oil NGLI #2 grease.
All additions to the motor bearings are to be with a compatible
grease such as Exxon Mobil Polyrex EM and Chevron SRI.
The above intervals should be reduced to half for vertical shaft
installations.
Motor Services
Should the motor prove defective within a one-year pe-
riod, contact your local Loren Cook representative or your
nearest authorized electric motor service representative.
Changing Shaft Speed
All belt driven fans with motors up to and including 5HP
(184T max) are equipped with variable pitch pulleys. To
change the fan speed, perform the following:
1.
Loosen setscrew on driver (motor) pulley and remove key,
if equipped.
2.
Turn the pulley rim to open or close the groove facing. If
the pulley has multiple grooves, all must be adjusted to the
same width.
3.
After adjustment, inspect for proper belt tension.
Speed Reduction
Open the pulley in order that the belt rides deeper in the
groove (smaller pitch diameter).
Speed Increase
Close the pulley in order that the belt rides higher in the
groove (larger pitch diameter). Ensure that the RPM lim-
its of the fan and the horsepower limits of the motor are
maintained.
Maximum RPM
CA SWSI, CPS-A, CPA-A
Max. RPM
Size
Class I Class II Class III
120
3348
4368
5503
135
2976
3883
4892
150
2678
3494
4403
165
2435
3177
4002
180
2114
2757
3474
195
1951
2545
3207
210
1812
2363
2978
225
1691
2206
2779
245
1553
2026
2553
270
1419
1851
2332
300
1277
1666
2099
330
1161
1514
1908
365
1064
1388
1749
402
965
1259
1586
445
873
1138
1434
490
793
1034
1303
540
719
938
1182
600
647
844
1094
660
588
768
967
730
532
694
874
CA/CF/CP IO&M
Nema Frame Size
213T-365T
404T and Larger
1800
Over
1800
RPM &
1800
RPM &
Less
RPM
Less
2 yrs.
6 months
1 yr.
3 months
1 yr.
3 months 6 months 1 month
CA and CAF DWDI
Max. RPM
Size
Class I Class II Class III
120
3714
4846
135
3307
4315
150
2575
3357
165
2374
3095
180
2176
2839
195
2009
2621
210
1865
2434
225
1741
2271
245
1631
2128
270
1443
1883
300
1262
1647
330
1147
1496
365
1038
1354
402
941
1228
445
851
1110
490
773
1009
540
702
916
600
631
823
660
574
749
730
519
677
CF SWSI, CPS, CPA
Size
Class I Class II Class III
60-100*
4230
120
3404
135
3026
150
2723
165
2476
180
2269
195
2095
210
1795
225
1675
245
1539
300
1257
330
1142
365
1023
402
939
445
849
490
771
540
700
Over
600
630
1800
660
573
RPM
730
518
*Sizes 60 through 100 only applies to
CPS and CPA.
RPM Derating Factor
Temperature
(°F)
70
200
300
400
500
600
700
800
For elevated airstream temperatures, the maximum fan speed limits
must be derated by the factors above.
Pulley and Belt Replacement
1. Remove pulleys from their respective shafts.
2. Clean the motor and fan shafts.
3. Clean bores of pulleys and coat the bores with heavy oil.
4. Remove grease, rust or burrs from the pulleys and
shafts.
5. Remove burrs from shaft by sanding.
6. Place fan pulley on fan shaft and motor pulley on its
shaft. Damage to the pulleys can occur when exces-
sive force is used in placing the pulleys on their re-
spective shafts.
7.
Tighten in place.
8. Install belts on pulleys and align as described in Belt
and Pulley Installation.
Bearing Replacement
The fan bearings are pillow block ball bearings.
An emery cloth or file may be needed to remove imper-
fections in the shaft left by the setscrews.
For Arrangement 1, 2, 9 and 10:
1.
Mark the position on the shaft of both bearing races, set-
6105
screws, and the wheel and pulley. Mark the location and
5436
4230
orientation of the inlet cone. Note the clearance between
3901
the wheel and inlet cone.
3577
2.
Remove the fan pulley and inlet cone.
3302
3066
3.
Remove the wheel from the shaft. A 2-jaw puller may be
2862
needed.
2681
2372
4.
Remove bearing hold-down bolts. Remove shaft and
2074
bearings as one unit.
1885
5.
Remove the anti-corrosion coating from the shaft with a
1706
1547
suitable degreaser.
1399
6.
Remove the bearing from the shaft using a bearing pull-
1271
1164
er. If a bearing puller is not available, tap on the bearing
1037
with a wood block and hammer to remove it.
944
853
7.
Smooth and clean the shaft and bearing bore thoroughly.
7
CPV
Max. RPM
Size
Standard Reinforced
5519
6953
60-100*
4441
5595
120
3948
4974
135
3553
4476
150
3230
4069
165
2961
3730
180
2733
3443
195
2341
2950
210
2185
2753
225
2007
2529
245
1639
2065
270
1490
1877
300
1334
1681
330
1225
1543
365
1108
1396
402
1006
1268
445
913
1150
490
822
1035
747
941
675
851
RPM Factor
Steel
Aluminum
1.00
1.00
0.98
0.93
0.96
0.79
0.94
**Aluminum wheels are
0.91
0.87
**
not available above 300°.
0.81
0.75
Max. RPM
2719
2527
2093
-
2035
1766
1588
1429
1571
1277
1407
1152
1265
1015
1260
876
1091
837
1006
716
869
624
805
539
701
463
660
360
576
B51181-002