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PILOT VALVE (AUXILIARY)
DISASSEMBLY AND ASSEMBLY
Assembly
1. Install the wire, shim, secondary pressure spring and
spring seat on the spool, in that order.
• The washer is for adjusting the preset value of the
secondary pressure spring, and its thickness differs
for each spool assembly. In some cases this washer
is omitted.
2. Insert the spool through the larger hole of the spring
seat, and while pushing down the spring seat to com-
pr
ess the secondary pressure spring, move the spring
seat sideways to install it.
• Take care not to scratch the spool surface.
• Do not push down the spring seat by 4 mm or
more.
3. Secure the casing in a vise.
• Install the return springs in the casing.
• Install the return springs in the positions they were in
before disassembly.
4. Install the pressure reducing valve sub-assemblies in
the casing.
• Install the sub-assemblies in the positions they were
in before disassembly.
• When installing the pressure reducing valve sub-as-
semblies,
take care that the lower end of the spool
does not hit hard against the casing corners.
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