15
4) Replacing O-rings (simultaneous replacement of diaphragms and O-rings is
recommended)
Two types of O-ring are used - P-18 (x 1) is used with the type-B inlet pipe, and P-10 (x 7)
is used with the hose nipples, and long nipples fitted to the pump head.
<Hose nipples, long nipples>
Use tools No.1, 3, 5, 7, 8, 9,and 10.
(1) Remove the top or bottom of the pump up to the pump head in accordance with steps
(1)~(8) for replacement of the diaphragm and remove the wedge.
(2) Remove the hose nipple from pump heads A, B, and C, and remove the long nipple
from pump head B.
(3) After disassembly, clean the various components with a paper towel soaked in ethyl
alcohol.
(4) Apply a uniformly thin covering of vacuum grease to the new O-ring, and replace the
old O-ring.
(5) Assemble in the reverse order to disassembly.
<Non-return valve and type-B inlet pipe>
Use tools No.1, 3, 5, 7, 9,and 10.
(1) Remove the pump head A or C on the top of the pump in accordance with steps
(1)~(8) for replacement of the diaphragm.
(2) Remove the hose, and remove the non-return valve and type-B inlet pipe.
(3) After disassembly, clean the various components with a paper towel soaked in ethyl
alcohol.
Non-return valve
Type-B inlet pipe
Pump head B
Seal tape
(coiled 4 to 5 times)
O-ring (P-18)
Hose nipple
Long nipple
O-ring (P-10)
Wedg
e
Pump head A
Pump head B
Pump head C
