Step 2
With the sheave resting with the bore axis in the vertical direction,
arrange the sheave on the press table/support.
NOTE:
The overall width of the Sheave Pac assembly is wider than the
sheave inner hub; therefore, the sheave must be securely supported
while allowing the Sheave Pac assembly to be installed correctly
without ‘bottoming out’ on the press table/support. Options for this
include, but are not limited to, supporting the sheave on adequate
blocks or a support ring or utilizing an opening in the press table/
support itself to allow the Sheave Pac assembly to be completely and
correctly installed in one step.
NOTE:
Ensure that
all
of the lifting equipment including, but
not limited to, the crane and lifting fixtures meet any necessary
hoisting regulations for this lifting and handling operation, prior to
beginning the next step.
Step 3
The pregreased, presealed and unitized Sheave Pac assembly must
be installed as a complete assembly. A lifting fixture may be designed/
produced to accommodate the handling and installation procedure.
Utilizing this potential fixture, carefully remove the bearing assembly
from the container and packaging. Straps/chains must not be used
around the bearing for lifting. Doing so will lead to seal damage.
NOTE:
Any and all lifting fixture(s)/mechanism(s) shall be designed to ensure
no damage is done to the assembly or its components. Particular
care must be taken with the entire seal to ensure that no contact
or interaction is present between the lifting fixture(s)/mechanism(s)
incorporated into the procedure and the seal. Please see diagram
below, and refer to page 8 for a graphical representation of a typical
cone bore lifting fixture(s)/mechanism(s).
*NOTE:
8” Assembly: Maximum Fixture Dimension Must Not Exceed 9.25”.
10” Assembly: Maximum Fixture Dimension Must Not Exceed 11.5”.
12” Assembly: Maximum Fixture Dimension Must Not Exceed 13.5”.
14” Assembly: Maximum Fixture Dimension Must Not Exceed 15.5”.
NOTE:
M8x1.25 metric threaded lifting holes have been incorporated into
the cup O.D. to aid in lifting. Threaded eyebolts or swivel hoists used
for lifting must not have a threaded length beyond 12mm for 12” and
14” bore, 10mm for 10” bore, and 9mm for 8” bore. The use of longer
thread length will result in internal bearing damage.
NOTE:
Use of the lifting holes will require the provided lifting hole plugs
to be removed and re-installed in the cup O.D. It is suggested that
when the button head cap screw is re-installed, it is torqued to 160
in-lbs for lubricated threads or 200 in-lbs for dry threads.
NOTE:
Care must be taken to ensure nothing, including grease,
is introduced to the bearing through the lifting holes if plugs
are removed and re-installed.
NOTE:
It is suggested that an adequate length of strap is used in conjunction
with the lifting holes to ensure no contact is present between the
strap and the seal. For additional details, refer to Step 3 of the section
entitled
Mounting of the Bearing into Sheave.
Step 4
Complete any necessary measurements of the bearing assembly,
snap ring grooves, sheave, etc., for aid in the installation of assembly
to the center of the sheave.
NOTE:
It is suggested that the bearing assembly is centered in the
sheave to ensure uniform loading across each of the bearing
rows during operation.
Step 5
Evenly apply general purpose, lithium complex grease to assembly O.D.
with particular care to coat each seal O.D. to aid in the installation of the
assembly as well as minimize potential seal damage.
Step 6
Carefully lower the assembly to rest at the entrance of the sheave bore
using special caution not to damage the bearing and/or seal components.
Step 7
With the bearing resting on the sheave bore entrance, remove any lifting
equipment that may interfere with continued installation and carefully
(using human force) apply enough installation pressure to insert the
bottom seal O.D. portion of the assembly into the sheave until the cup
4
Lifting Fixture(s)/
Mechanism(s) Must Not
Contact This Area
Lifting Fixture(s)/Mechanism(s)
O.D. Must Not Exceed
Dimensions in Following Note*.
Fig. 1
