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Maintenance
To test the tubing for water-tightness empty the oil
reservoir, and if possible raise water pressure 50%
above normal and observe for a period of time for
leaks.
Another way is to leave oil in reservoir,
pressurize tubes with air and look for bubbles.
If a hot bearing is discovered, or if the oil temperature
climbs abnormally fast, the cause must be found and
corrected immediately. The most common causes of
hot bearings are:
1. Stoppage or reduction of cooling water.
2. Lack of oil (low oil level).
3. Contaminated (dirty) oil.
4. Misalignment (couplings or bearings).
5. Plugged oil passages.
6. Rough spots on shaft or bushings.
7. Improper internal clearances (radial or axial).
Installation / Inspection of Kingsbury-type
Thrust Bearings
Rotor Removal
1. Drain oil, unbolt and lift off the upper bearing
housing cover.
2. Unbolt inner end cap in lower bearing housing.
3. Unbolt and remove outer end cap in lower
bearing housing.
4. Lift upper bearing housing along with the rotor
only far enough to reach the air deflector bolts by
using the openings provided in the housing
5. Unbolt air deflector and remove, if necessary.
6. Lift upper bearing and rotor completely free of
stator.
Thrust Bearing Removal
1. Support rotor weight at shaft extension with jack
or block.
2. Unbolt and lift off upper bearing housing cover.
3. Unbolt thrust plate from bearing housing and lift
off thrust plate and upper guide bearing.
4. Remove lock nut from shaft and pull thrust block
from shaft.
5. Lift off the Kingsbury-type thrust bearing from
bearing housing or adapter ring.
Cleaning
All parts of the bearing and housings must be
thoroughly cleaned before assembly.
Remove anti-rust coatings with an approved solvent.
Use lint-free rags or cloths for cleaning. Remove all
burrs, bruises or nicks, and rust from bearing
surfaces. Bruises or dents on shoe faces should be
removed with a scraper.
Slight rusting of the runner face may be removed with
a fine oil-stone. If deep rusting occurs, refinishing will
be necessary.
CAUTION
Indentations on face of bearing runner may cause
bearing failure or improper operation.
Never use a coarse-grained stone, scraper, or a file on
the runner face
Assembly Notes: Dowels, keys, and bolts must not
bottom or bind. Each shoe should be free to tilt in
any direction. Oil the runner face. Seal with Silicone
RTV or equivalent, all housing joints previously
sealed.
Start Up: Make sure oil is at the proper level (check
sight gauge). After the bearing has been turned a
few times under load, inspect the shoe faces - high
spots should be removed by scraping.
CAUTION
Excessive heat may cause damage to insulation or
lubrication.
Allow time between starts to permit windings to cool.
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