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8.4 Disassembly (See "9. Exploded Drawing.")
1. Loosen the hexagon nut (nominal size: 19 mm) on the top of the coil and remove the coil.
Pay attention not to lose the small parts such as washers and O-ring.
2. Loosen the hexagon bolts by 2 to 3 mm and check that no residual pressure is detected.
Nominal size of hexagon bolt
Nominal size
of the product
Nominal size
of hexagon bolt
3. Remove the hexagon bolts and the cover complete set and then take off the valve complete set
and the kick spring.
4. Pay attention not to have the disassembled parts damaged, deformed or lost.
5. Reassemble the parts in the reverse order of disassembly. Replace the gasket at the time of
reassembly.
(1) Attachment of piston rings and inner rings to the valve
Since the piston ring and inner ring have installation direction, install them as below. Incorrect
installation may cause operation trouble.
Put the piston ring and the inner ring at positions in which the slit part of each ring is placed
on the opposite side.
Attach piston rings and inner rings to the valve with checking the top and bottom sides of the
piston rings. Place the inner ring at inside of the piston ring. The piston rings shall be attached in
a way that the slit part of each ring is not on the same side.
Cross sectional view of the valve
10A-20A
25A-32A
10 mm
13 mm
Piston ring
40A-65A
17 mm
Caution
Two slit parts shall not
be on the same side.
Inner ring
17
■EPDT-247i■
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