Hitachi EX20UR-2 Manual page 136

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8. Remove four spool (9) assemblies from housing
(10).
IMPORTANT: In order to avoid mixing them up, be
sure to indicate the port numbers
from which each spool (9) assembly
came.
UPPERSTRUCTURE / Pilot Valve
9. Compress spring (14) to remove spring guide (6)
from spool (9).
Remove spacer (8) and shims (A) from spool (9).
Disassemble the other three spools (9) in the same
manner.
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