B. General Cautions:
• Sheave and bearing assembly should be lifted by means
of the sheave to ensure neither the bearing nor the
snap rings carry the combined weight of the sheave and
bearing assembly.
Step 1
Ensure that the pin O.D. and lead-in chamfers are in acceptable
dimensional condition and free of sharp corners, raised material,
dents, nicks, burrs, gouges, and corrosion.
NOTE:
Any surface imperfections on the pin O.D. must be carefully filed and/
or stoned down completely prior to assembly. These imperfections can
cause difficulty in assembly, create stress risers during application
loading and cause installation damage to the cone bore clip and seals.
This may directly increase the chance of contamination ingress and
cause premature damage to the bearing assembly.
Step 2
Evenly apply general purpose, lithium complex grease to the Sheave
Pac assembly bore to aid in the installation of the assembly and
minimize any potential installation damage.
NOTE:
During the suggested grease application, it is suggested that the
assembler physically ensure that the bore clip is seated into the
cone bore grooves.
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
Utilizing safe lifting/handling practices, carefully locate the sheave
and Sheave Pac assembly above the pin for installation. Depending
on block design, this step may vary to include carefully locating
the pin for insertion through a stack of sheaves resting with axes
of rotation in the horizontal direction. Ensure that the sheave
and bearing assembly remain perpendicular to the pin for proper
installation alignment.
Step 4
Gradually lower the sheave and Sheave Pac assembly onto the pin
while ensuring that the sheave and bearing assembly remain level and
perpendicular to the pin for improved installation. Depending on block
design, this step may vary to include carefully inserting the pin through
a stack of sheaves resting with axes of rotation in the horizontal
direction. Ensure that the pin remains level and perpendicular to both
the sheave and bearing assembly for improved installation.
NOTE:
The pin must remain aligned in the assembly cone bores during
installation to minimize any potential binding and installation
damage to both the bore clip and the seals.
Step 5
Repeat Steps 1-4 as necessary for complete block build.
NOTE:
Once sheaves/bearings are installed onto shaft, sheaves need to
be rotated several times to ensure lubrication is coating all bearing
surfaces and that no binding is experienced.
C. Dismounting of the Bearing
The bearing can be dismounted in the reverse order of mounting.
A. General Comments
Multiple cautions and notes of careful attention are also included
throughout this suggested installation procedure. This suggested
installation procedure includes a number of notes and cautionary
statements.
It is based on Timken’s internal evaluations which cannot
anticipate all conditions in the field and there may be other methods of
installation that may be more suitable in the judgment and experience
of the end user or installer.
Because these instructions are merely
suggestions, they may or may not be altered as the customer and/or
installer sees fit.
Therefore, it is the responsibility of the customer
and/or installer to ensure careful and accurate assembly handling and
installation. Any and all damage incurred as a result of the handling
and installation procedure shall void all bearing Limited Warranty.
B. Bearing Assemblies
Bearing assemblies should be stored in a horizontal position (vertical
bearing axis) in order to avoid cone or cup ovality. Unmounted
assemblies should be stored in their original packaging and kept in
a location that is clean and free from moisture and contamination.
Periodic inspection of stored bearings should be completed and
any undesirable conditions should be corrected immediately. It is
suggested that any stored bearing assemblies that show evidence
of moisture contamination not be placed into service because their
performance potential may be decreased due to contamination and/
or corrosion damage.
NOTE:
Special care must be used during the removal of the bearing
packaging. Use of sharp objects may cause damage to the assembly
components. Particular care must be taken to ensure no seal
damage results from the use of sharp objects or cutting tools.
It is not necessary to wash new bearings to remove any preservative
for rust protection that was applied at the factory. This preservative
has very little lubrication value and will not contaminant the lubricant
that is used in or around the bearing.
All tools should be clean and in good condition. The work benches and
area in which assembly work is done should be kept clean. Assemblies
should not be installed near welding booths or machines where chips,
dirt or any form of contamination are likely to get on or in the bearings.
Typical bearing lifting practices utilizing straps/chains around the
bearing must not be employed. Doing so will cause damage to the seals.
6
GENERAL BEARING ASSEMBLY STORAGE & HANDLING
