COOK UCIC - Manual (Page 7)

7
Speed Reduction
Open the pulley in order that
the belt rides deeper in the
groove (smaller pitch diame-
ter).
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 main-
tained.
Pulley and Belt Replace-
ment
a. Remove pulleys from their
respective shafts.
b. Clean the motor and fan
shafts.
c. Clean bores of pulleys and coat the bores with heavy oil.
d. Remove grease, rust, or burrs from the pulleys and
shafts.
e. Remove burrs from shaft by sanding.
f. Place fan pulley on fan shaft and motor pulley on its
shaft. Damage to the pulleys can occur when excessive
force is used in placing the pulleys on their respective
shafts.
g. Tighten in place.
h. Install belts on pulleys and align as described in the Belt
and Pulley Installation section.
Bearing Replacement
The fan bearings are pillow block ball bearings.
Figures 6, 7, and 8, on page 6, show the components
described in the following steps.
CIC Bearing Replacement
a. Loosen and remove belts by lowering motor mounting
plate with the four adjusting nuts.
b. Remove the discharge cover by removing the attaching
bolts around the perimeter of the inner drum (discharge
end of unit). Do not remove fan sheave yet.
c. Remove the discharge cover by removing the attaching
bolts around the perimeter of the inlet plate.
d. Remove inlet cone by removing attaching bolts/nuts
around perimeter of the inlet plate.
e. Remove wheel by loosening setscrews and sliding off
shaft. A 2-jaw puller may be required.
f. Record the location of the fan sheave from end of shaft,
and remove the sheave.
g. Record the distance from either bearing to the end of
the shaft.
h. Loosen setscrews on bearings and remove shaft.
i. Mark setscrew location on shaft and smooth down any
raised shaft material as required.
j. Remove bearings from bearing base and replace with
new ones, noting the exact location of each; Do not fully
tighten base bolts.
k. 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.
NOTICE! Do not hammer the end of the shaft or the
bearing housing.
Maximum RPM
CIC
Size
Class 1 Class 2 Class 3
120 3948 5151
135 3508 4577
150 2749 3587
165 2509 3273
180 2150 2805 3534
195 1987 2592 3266
210 1841 2402 3026
225 1712 2234 2814
245 1608 2098 2643
270 1418 1850 2331
300 1276 1665 2097
330 1162 1516 1910
365 1065 1389 1751
402 964 1258 1585
445 873 1139 1435
490 793 1035 1303
540 719 938 1182
600 648 845 1065
660 587 766 965
730 532 694 874
Figure 6- CIC Arrangement 1 Components
Figure 7 - CIC Arrangement 9 Components
Figure 8 - UCIC Components
l. Return setscrews to same location as marked above
and tighten one setscrew on each bearing to half its
specified torque.
m. Rotate the shaft to allow the bearings to align them-
selves.
n. Install wheel and inlet cone to their proper location per
wheel-to-inlet clearance section on page 3.
o. Tighten hold-down bolts to proper torque.
p. Turn the shaft by hand. resistance should be the same
as it was before hold-down bolts were fully tightened.
q. Tighten all bearing setscrews to full specified torque.
r. Replace the sheave, align with motor sheave, and
adjust the belt tension.
s. Test run fan and retighten all setscrews and bolts, and
trim balance as necessary (.0785 in/sec max).
t. Replace discharge cover.
After 24 hours of operation, retighten all setscrews and bolts
to the appropriate torque.