DOC-20230111-WA0038.

UPPERSTRUCTURE / Pilot Valve
Disassemble Travel Pilot Valve
1. Clamp casing (14) in a vise. Loosen bolt (1) to
remove cover (2) from holder (10).
: 10 mm
2. Remove socket bolts (8) (2 places), to remove
holder (10) from casing (14).
:8 mm
3. Pull out pusher (23) from casing (14) (4 places).
Bushing (13) and oil seal (11) are removed with
the pusher.
4. Pull out pusher (23) from bushing (13), with a
bamboo spatula to remove oil seal (11). (4 places)
IMPORTANT: Make mark on spools to install them
to their former position easily.
5. Pull out the spool (17) assembly from casing (14)
turning the spool.
Spring guide (22), balance spring (21), shim (20)
and spacer (19) are removed with the spool.
NOTE: The spool has been selected to match the
hole of the casing. The spool and casing
must be replaced as an assembly.
IMPORTANT: The number of the shims has been
determined during the performance
testing at the factory. They must be
kept together with their spool.
6. Compress balance spring (21). Remove spring
guide (22), balance spring (21), shim (20) and
spacer (19) from spool (17). (4 places)
7. Remove spring (18) from casing (14). (4 places)
IMPORTANT: Put a stand under bracket (26). If
holder (10) bears the reaction force,
a strong force acts on pin (3) and the
pin maybe deformed.
IMPORTANT: The inside of spring pins (24), (25)
hole in the bracket is stepped-shape.
Therefore, the spring pin can only be
pushed out in one direction.
8. Put a stand under bracket (26).
Push out spring pins (24), (25), (26) (2 used) from
bracket (26) at the same time using special tool
(ST 1237). Remove the bracket from pin (3). (2
places)
Do not remove spring pin (27) from the bracket
unless necessary.
NOTE: The outside end of the spring pin has been
caulked.
3
24,25
26
27
Caulked
Stand
W176-02-07-019
9. Remove socket bolts (28) (2 used) to remove
damper (6) and rubber seat (7) from pin (3). O-
ring (4) is removed with them. (2 places)
:5 mm
W2-7-25