4.2.1
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4.2 Maintenance of Rotary Pump
NOTICE: Instruments shipped to European area where CE marking conformity is necessary are
not provided with the rotary pump. Also according to the configuration of the
apparatus, the rotary pump is not provided even when shipped to outside of the
European area.
A period of inspection cannot be uniformly determined simply because operating conditions of
vacuum pumps differ. To minimize trouble and to maximize service life, conduct periodic
inspections (at least once every six months) according to the operation conditions.
For maintenance and inspection of the rotary pump refer to the
instrument manual furnished with it.
4.2.1 Oil Change
Condition of the pump oil exerts a strong influence on vacuum pressure produced by the pump
as well as on pump service life. To maintain the pump under ideal operating conditions, always
pay attention to the oil volume and cleanliness by observing through the oil gauge window.
Replace the oil with a new supply as soon as it appears to be contaminated.
(1) Under normal operating conditions, replace old oil with new oil semiannually, although the
recommended period for oil change greatly differs according to actual operating conditions.
When employing the pump with air containing steam or other materials noxious to the oil,
the oil rapidly becomes degraded. In this instance, replace it sooner than usual.
(2) When changing oil, refer to the instruction manual furnished with the pump.
(3) We recommend employing SMR-100 (ULVAC, Inc.) for this Vacuum Pump.
4.2.2 Replacement of Oil Mist Trap Element
The oil mist trap element is of a disposable type. When oil vapor or soot is found, replace this
assembly with a new one. (P/N 51E-1545)
IMPORTANT: The rotary pump has a finite life. Any rotary pump that has been in service for
five years should be replaced with a new one. An expired motor can cause
abnormal heating and emit fumes.
CAUTION: The rotary pump is a heavy object weighing as much as 30 kg. When the
pump must be lifted for oil change, the work should be performed by two or
more persons. Be careful not to get hands or feet caught.
WARNING: If it stops abnormally, the rotary pump tends to be hot, and touching it can
cause burns. If the pump stops abnormally, do not touch it, and call service
personnel.
