Louisville CD-1261 Manual Download

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IM-995

Installation, Operation & Maintenance Manual

Bearing Installation

(refer to safety section)

The following section gives some general instructions on bearing installation. If bearings are to be field installed, the specific
installation manual for the bearings will be provided and should be followed carefully. If provided, check the assembly drawings
and bearing manufacturer's instructions for location of the fixed and expansion bearings. The positions of these bearings cannot
be interchanged. Always follow the bearing manufacturer's instructions.

Solid Pillowblock

1. Lightly lubricate the bearing bore and slide bearing into the proper position on the

shaft. Sling the rotor assembly into place and loosely bolt the bearings in place.

2. When bearings are in place, shim appropriately and torque the base bolts using

values  from  the  Tightening  Torque  table  on  page  9.  Tighten  the  collar  setscrews  to
manufacturer’s specification. The setscrews on both bearings should be aligned with
one another. If the bearing has an adapter mount, hand tighten the locknut to establish
the “zero” point.  Next, tighten the number of turns per the instructions furnished with
the bearing.  Rotate by hand to be sure the bearings and shaft rotate freely.

3. Ensure the expansion bearing is centered within its housing. If bearings need to

forced onto the shaft then apply force on the inner race/collar only (does not apply
to adapter mount.) If an expansion bearing has been supplied, it should not be bolted
to the pedestal until the fixed bearing has been bolted and locked. After locking the
expansion bearing to the shaft, position the pillowblock to allow for axial expansion,
approximately centered in the pillowblock, then bolt to the pedestal.

4. Unless the user orders differently, bearings are lubricated in the factory with a

lithium complex, NLGI grade 2 grease.

Refer to the bearing lubrication schedule on

the next page.

Spherical Roller Bearings with Split Pillowblock Housings

1. The bearings should be disassembled, taking care not to interchange parts between

bearings. Tops of housings are not interchangeable with the bottom half pillowblock
from another bearing. Pins locate the top half of the housing to prevent it from being
installed in the reverse.

2. The lower bearing housing should be bolted loosely to the pedestal and seals; bearing

and adapter sleeve should be placed loosely on the shaft.

3. The rotor assembly with the seals and bearings should next be positioned over the

housings and carefully placed into the lower housings.

4. The stabilizing ring, sometimes referred to as the “C” ring, is installed in the bearing closest to the drive sheave or coupling

unless otherwise noted in the drawing. The bearing race should be centered in the expansion bearing. The exception may be
on Arrangement 3 or 7 fans with a high operating temperature. Refer to the fan drawing for location. The “C” ring is not used
in the expansion bearing.

5. When installing adapter sleeves, tighten for reduction in clearance per manufacturer’s instructions.
6. Bend down a tab on the lockwasher after finishing adjustment. Some brands of bearings do not utilize a lockwasher. Instead

you will find allen-head setscrews in the locknut outside diameter. Tighten the setscrew after reduction in clearance is attained.

7. Grease or oil according to manufacturer’s instructions. Grease/Lube will likely include the partial fill of the housing internal cavities.
8. Install the bearing housing cap bolts and bearing mounting bolts. Tighten bearing housing cap bolts and bearing mounting bolts.

Torque to bearing manufacturer's instructions.

Sleeve Bearings

1. The bearings should be disassembled and cleaned with appropriate solvent, taking care not to interchange parts between

bearings. Parts of one bearing are generally not interchangeable with parts from another bearing. Bearing caps are matched
to the bottom half of the pillowblock and are not interchangeable with other pillowblocks.

2. The lower bearing housings should be bolted loosely to the pedestal. The lower liner should then be placed in the housing.
3. Oil the lower liners per manufacturer’s instructions and carefully sling the rotor assembly into place, being very careful not to

damage the bearing liners.

4.  Install thrust collars and thrust plates in the fixed bearing
5.  Make sure to install the oil slinger rings in their correct location and peen the ring screws in place.
6.  When handling the liners, be careful not to damage the surfaces, as they are babbitted and are fragile.
7.  The housings are generally tapped with a number of ports. Be sure the oil level gauge, circulating oil supply and discharge,

thermocouples, etc., are correctly placed for accessibility.

8. Make sure that proper oil type and quantity is used. Refer to the fan general assembly drawing.
9. Make sure that the thrust collar screws, liner screws, cap bolts and plunger are torqued to manufacturer’s specifications.

Bearing instructions are shipped with the fan. Instructions can also be found on the bearing manufacturer’s website.

Split Pillowblock Bearings

Solid Pillowblock Bearings