COOK QMXD Installatie-, Bedienings- en Onderhoudshandleiding - Pagina 7

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COOK QMXD Installatie-, Bedienings- en Onderhoudshandleiding
Exceptions to the greasing interval chart:
• Periodic Applications (any break of one week or more):
It is recommended that full lubrication be performed prior to
each break in operation
• Higher Temperature: It is recommended to halve the inter-
vals for every 30°F increase in operating temperature above
120°F not to exceed 230°F for standard bearings; high tem-
perature bearings (optional) can operate up to 400°F
• Vertical Shaft: It is recommended that the intervals should
be halved
Loren Cook Company uses petroleum lubricant in a lithium
base. Other types of grease should not be used unless the
bearings and lines have been flushed clean. If another type of
grease is used, it should be a lithium-based grease conforming
to NLGI grade 2 consistency.
A NLGI grade 2 grease is a light viscosity, low-torque, rust-
inhibiting lubricant that is water resistant. Its temperature
range is from -30°F to +200°F and capable of intermittent
highs of +250°F.
Motor Bearings
Motors are provided with prelubricated bearings. Any
lubrication instructions shown on the motor nameplate
supersede instructions below.
Motor bearings without provisions for relubrication 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
Including 184T
Service
1800
Conditions
Over
RPM
1800
and
RPM
Less
Less
Standard
3 yrs. 6 months 2 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 period,
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 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.
QMX IO&M
NEMA Frame Size
213T-365T
404T and Larger
1800
Over
RPM
1800 RPM
1800
and
and Less
RPM
1 yr.
3 months
1 yr.
3 months
6 months
1 month
Maximum RPM
Size
Level 1
90
120
135
150
165
1975
180
1811
202
1610
225
1449
245
1330
270
1166
300
1000
330
365
402
445
490
540
600
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 limits of
the fan and the horsepower limits of the motor are maintained.
Pulley and Belt Replacement
1. Loosen and remove belts by adjusting motor mounting
plate.
2. Remove pulleys from their respective shafts.
3. Clean the motor and fan shafts.
4. Clean bores of pulleys and coat bores with heavy oil.
5. Remove grease, rust or burrs from pulleys and shafts.
6. Remove burrs from shaft by sanding.
7.
Place fan pulley on fan shaft and motor pulley on motor
shaft. Damage to pulleys can occur when excessive force
is used in placing the pulleys on their respective shafts.
8. Tighten in place.
9. Install belts on pulleys and align as described in Belt and
Over
Pulley Installation, page 3.
1800
RPM
Bearing Replacement
The fan bearings are pillow block ball bearings.
1. Loosen and remove belts by adjusting motor mounting
plate.
2. Remove the bearing cover by removing the bolts around
the perimeter of the bearing cover. Do not remove fan
sheave yet.
3. Remove inlet cone by removing attaching bolts/nuts
around perimeter of the inlet plate.
4. Remove wheel by loosening setscrews and sliding off
shaft.
5. Record the location of the fan sheave from end of shaft,
and remove the sheave.
6. Record the distance from the bearing to the end of the
shaft.
7.
Loosen setscrews on bearings and remove shaft.
8. Remove bearings from bearing base and replace with
new ones, noting the exact location of each; do not fully
tighten base bolts.
9. Slide shaft through bearings until shaft protrudes the
same amount as measured above. Tapping the inner race
of each bearing with a soft driver may be required. Do not
hammer the end of the shaft or the bearing housing.
10. Return setscrews to the same location as marked above
and tighten one setscrew on each bearing to half its
specified torque.
7
QMX
QMXHP
Level 2
Level 1
Level 2
-
4000
-
4000
-
3707
-
4000
-
3295
-
3876
-
2907
-
3510
2633
2368
3191
2420
2171
2884
2152
1935
2600
1937
1737
2340
1774
1595
2097
1623
1386
1819
1465
1248
1679
856
1332
1134
1527
801
1204
1026
1381
709
1080
931
1252
612
988
841
1132
602
897
759
1028
523
813
693
912
459
732
624
840
QMXXP
Level 2
Level 3
-
-
-
-
-
-
2920
3940
2654
3582
2433
3231
2168
2919
1947
2626
1767
2361
1603
2134
1426
1921
1296
1791
1172
1604
1064
1458
961
1312
871
1202
792
1069
703
959
B51092-005