Instructions Manual
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Multiple Roots Type Dry Pump GR60/90/180
YK09-0023-DI-003-02
29
7. Maintenance
7.1 Inspection
Check the following items at least once a day. It is effective to avoid a breakdown and extend the
lifetime.
(1) When the operation stops, are the oil levels between the upper and lower level lines at the two
oil level gauge?
●
After the operation starts, the oil level decreases by approx. 1 cm. If the operation is
started under the conditions where the oil level is between the level lines of the oil level
gauge at a stop, there is no problem if the oil level is not between the level lines of the oil
level gauge during the operation.
●
When the operation stops, if the oil levels are not between the level lines of the oil level
gauge, it is necessary to supply oil or collect the oil leaked from the mechanical seal. Do
the work following "3.2 Oil Filling."
(2) Is there abnormal noise during the operation?
(3) Is there unusual motor current during the operation?
In addition, if operation at a high load (such as continuous operation with a pressure of 1 kPa or
more, repeated operation at between the atmospheric and vacuum pressures, repeated
start-and-stop operation) is performed, increase the frequency of inspection.
7.2 Operation after long-term storage
After long-term storage (3 months or longer) or after the equipment has been stopped for a long time
(3 months or longer), oil film may not be formulated at the seal part of the mechanical seal, which
fails to seal. Supply oil following "3.2 Oil Filling."
If the product is used after long-term storage (6 months or longer) or after the equipment has been
stopped for a long time (6 months or longer), the internal parts may be damaged during the operation.
Therefore, if it has not been used for a long time, ask the nearest service center to inspect it.
7.3 Overhaul
Overhaul is necessary to maintain the performance (including safety) and also maintain scheduled
production.
Do overhaul once a year.
In addition, if the pump is extremely polluted or the performance
extremely deteriorates under the conditions of use, do an overhaul even
within one year.
For overhaul, contact the nearest service center. Note that when you make a request for an overhaul,
fill out the pollution notice at the end of this document and submit it.
If the details on the hazardous substances you have used are not
disclosed, or if substances that are hard to detoxify are exhausted, we
may refuse maintenance and other operations at your site.
CAUTION
WARNING
Содержание GR60
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