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11
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4. Inspection and Maintenance
4.1 Periodical Inspection
Install a pressure gauge (option) to the pressure monitor installation port to measure the pressure
inside pump. The filter element is recommended to be replaced under the following conditions.
(1) If the pressure is constantly 0.03MPa (0.3kg/cm
2
) (gauge pressure) or higher.
(2) If the element is used for more than 3000 hours.
4.2 Replacement of Filter Element
4.2.1 Dismounting a Filter Element
(1) Stop the pump. Disconnect the pipe on the exhaust side if connected.
(2) Loosen the
⑥
hexagon nut and remove the
①
upper lid.
(3) Loosen the
⑨
hexagon nut and remove the
⑩
seal washer.
(4) Remove the
③
Filter holder (with a pressure-releasing device).
(5) Remove the
④
filter
elements.
Dismounting of the filter element is completed.
(Note) In replacing a filter element, wash off the dust adhering inside the main body or the
pressure-releasing device if any. Also, check the operation of the pressure-releasing
device (that the valve is lifted when pushed with a finger). If it does not operate properly (if
not lifted), replace the filter holder (with an pressure-releasing device) when remounting.
4.2.2 Mounting of a Filter Element
(1) Confirm there is no dust adhering or flaw on the
④
filter element installation surface.
(2) Attach the
④
filter elements in the
②
lower lid. Vacuum grease (ULVOIL G-100) on the
gaskets on the top and bottom ends of the filter element will facilitate the next dismounting.
(3) Attach the
③
filter holder (with a pressure-releasing devise). The holder shall be placed
so that the gaskets of the
④
filter element do not shift out from it.
(4) Put a new
⑩
seal washer and fasten the
④
filter element with a
⑨
hexagon nut.
(5) Fasten the
①
upper lid with a
⑥
hexagon nut, a
⑦
plain washer, and a
⑧
hexagon
head bolt. The
⑤
packing between the
①
upper lid and the
②
lower lid shall be
replaced when there is any flaw on the
⑤
packing.
Mounting of the filter element is completed.
(Note)
⑩
seal washer cannot be used repeatedly.
