Denyo DIS-390ES, Instruction Manual, Page: 46 / 67

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(4) Checking on diaphragm in capacity regulator
Check the diaphragm in capacity regulator,
and replace it with a new one as required.
Parts number of diaphragm
Y06030 44208
(5) Replacement of diaphragm in pressure regulator valve
Parts number of diaphragm
Y06034 00020
(6) Replacement of O-ring in minimum pressure valve
Remove the minimum pressure valve cover ,
replace the O-ring.
Parts number of O-ring
Y01505 00048
(7) Replacement of O-ring in compressor filler port
Remove the compressor oil filler port from compressor
oil chamber, replace the O-ring.
Parts number of O-ring
Y01500 00048
(8) Replacement of O-ring on connector