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Section 11 |
NORD Motor Maintenance
and Troubleshooting
www.pflow.com
P 414 352 9000
F 414 352 9002
6720 N. Teutonia Ave.
Milwaukee, WI 53209
Gearbox
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Maximum Oil
Temperature
Proper gearbox lubrication is essential in order to reduce friction, heat, and
component wear. Lubricants reduce heat and wear by inserting a protective
“fluid boundary” between mating parts and preventing direct metal to metal
contact. Lubricants also help prevent corrosion and oxidation, minimize
foam, improve heat transfer, optimize reducer efficiency, absorb shock loads
and reduce noise.
Most reducers are shipped from the factory with a pre-determined oil fill
level in accordance to the specified reducer size and mounting position.
Consult the sticker adjacent to the fill plug to determine the type of lubricant
installed at the factory. Some units have special lubricants designed to operate in
certain environments or intended to extend the service life or service temperature
range of the lubricant. If in doubt about which lubricant is needed for a certain
application, please contact the PFlow Industries, Inc. Product Support Department.
If the gear unit is filled with mineral oil, the lubricant should be replaced at
least after every 10,000 operating hours or after every two years. If the gear
unit is filled with synthetic oil, the lubricant should be replaced at least after
every 20,000 operating hours or after every four years. Often gear reducers
are exposed to extreme ambient conditions, hostile environments, wet
conditions, or dirty and dusty operating areas. Especially in these situations,
it is important to establish a condition-based oil service interval.
To prevent reducer overheating, the reducer’s maximum oil sump
temperature limit must not be exceeded for prolonged periods of operation
(up to 3 hours continuous operation depending upon reducer size).
Oil Type
Maximum Oil Temperature Limit
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NOTICE
NOTE
Improper oil levels may lead to premature component wear and diminished service
life. The gear reducer may not receive proper lubrication if the unit is not mounted in
the position for which it is designed.
Do not weld on the gear unit or use the gear unit as an earth or ground connection
for any welding procedure as this may cause permanent damage to the bearings
and gears.
Unless special measures are taken, the immediate vicinity around the gear drive
or motor should not be exposed to any aggressive or corrosive substances,
contaminated air, ozone, gases, solvents, acids, alkalis, salts, radioactivity, etc.
The single shaft key must engage the full bore-land length at each end of the
hollow shaft.
