4
Notes on Grease Replenishment/Exchange Procedures
4.1
Grease Exchange Procedures for Speed Reducers and Gears
4-1
HW1484673
HW1484673
4
Notes on Grease Replenishment/Exchange Procedures
4.1
Grease Exchange Procedures for Speed Reducers and
Gears
4.1.1 Notes on Grease Exchange Procedures
Make sure to follow the instructions listed below at grease replenishment/
exchange. Failure to observe the following notes may result in damage to
motor and speed reducer.
NOTE
• If grease is injected without removing the plug from the
grease exhaust port, the grease will leak inside a motor, or
an oil seal of a speed reducer will come off. Make sure to
remove the plug or it may result in a failure.
Also, when using a tube, the length must be 150 mm or
shorter and the inside diameter must be 6 mm or longer.
If the tube is too long, the exhaust resistance at the tube
part is increased, and the inner pressure of the grease
bath is raised. It may result in coming off of an oil seal.
• Make sure to use a grease pump to inject grease. Set the
grease injection rate to 7 g/s or less. (Air supply
pressure to the grease pump: 0.3 MPa or less (rough stan-
dard))
• When using extrusion air for discharging the grease, set
air supply pressure at 0.025 MPa or less.
If the air supply pressure is higher than above mentioned
value, an oil seal of a speed reducer will come off, and it
may result in a failure.
• When using extrusion air for discharging grease, grease
may be vigorously discharged from the exhaust port.
Perform an operation such as using a tube at the grease
exhaust port to pour into an appropriate container.
• Make sure to fill the hose on the grease inlet with grease
beforehand to prevent air from leaking into the speed
reducer.
• After injecting grease, discharge the specified amount of
grease. If insufficient, the inner pressure is raised during
the operation, and grease may leak. When discharged
too much, the speed reducer is not lubricated sufficiently
during the operation, and it may cause the early failure of
the speed reducer.
• When filling/exchanging grease, the grease may flow out
from the grease inlet or the grease exhaust port. Prepare
a container to receive the grease and a waste cloth to
wipe the grease in advance.
• After mounting a speed reducer or a motor, and then wait
for 30 minutes or more and then inject grease.
If grease is filled before the sealing bond is solidified, it
may cause grease to leak.
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