DOC-20230111-WA0038.

Disassemble Control Valve 1
• Be sure to read “Precautions for Disassembly and
Assembly” thoroughly on page W1-1-1 before
starting the disassembly work.
1. Loosen socket bolts (1) (3 used) and socket
bolts (12) (8 used) of cover (2) side to remove
the cover from housing (8). Remove O-rings (3)
(9 used) from the cover.
:5 mm
2. Remove the spool (4) to (7) and (15) to (19)
assemblies from housing (8).
3. Loosen socket bolts (12) (11 used ) of cover (9)
side to remove the cover from housing (8).
Remove O-rings (3) (9 used ) from the cover.
:5 mm
IMPORTANT: As spool end (22) screw was coated
with LOCTITE, be sure to heat the
screw to 200 to 250℃ (392 to 482 °F)
before loosening it.
4. Attaching wooden pieces to both sides of
spools (4) to (7), (15) to (19), secure each spool
in a vise. Then loosen spool end (22) to remove
spring seats (23) ( 2 used ) and spring (24) from
each spool.
:5 mm
NOTE: As spring (24) is in its free length, there is
no danger of it flying out.
UPPERSTRUCTURE / Control Valve
W2-5-9