YAMADA Global Series, Maintenance Manual

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12
7.2 Inspection
▪ Spool assembly
Seal ring [Fig.7.9]
Close the diagonal slit and measure the outside diameter,
and if it is outside the usable range, replace the spool
assembly.
If the Seal ring is worn out or cracked, replace spool
assembly.
Usable range of Seal ring
A_, S_
Part to measure A
ø0.6909 in and over
{ø17.55 mm and over}
Part to measure B
ø0.9862 in and over
{ø25.05 mm and over}
P_
Part to measure A
ø0.4953 in and over
{ø12.58 mm and over}
Part to measure B
ø0.7039 in and over
{ø17.88 mm and over}
▪ Sleeve [Fig.7.10]
Measure the inside diameter, and if it is outside the usable
range, replace the sleeve.
Usable range of Sleeve
A_, S_
Part to measure A
ø0.6909 ~ ø0.6937 in
{ø17.55 ~ ø17.62 mm}
Part to measure B
ø0.9862 ~ ø0.9890 in
{ø25.05 ~ ø25.12 mm}
P_
Part to measure A
ø0.4984 ~ ø0.5016 in
{ø12.66 ~ ø12.74 mm}
Part to measure B
ø0.7055 ~ ø0.7087 in
{ø17.92 ~ ø18.00 mm}
▪ O ring, Packing
If the O ring is worn out or cracked, replace it.
<NOTE>
▪ Spool assembly and Sleeve must be replaced complete set.
Unable to replace individual component.
7.3 Installation
For installation, see [Exploded View] on the separate sheet and install in the reverse order of disassembly.
Tightening torque for valve body assembly attaching nuts
P_ 13 in-lbf {1.5 N ･ m}
<NOTE>
▪ Make sure there is no dust on the seal surface and it is not
damaged.
Fig.7.10
Fig.7.9