Honda FL6555 Operator's Manual page 44

SERVICE
Hydraulic valve
Control Valve Removal
Priorto removing control valve, ensure loader
is on the ground and all hydraulic lines are
relieved of oil pressure.
Label and disconnect hydraulic lines from
control valve. Cap IN and RETURN lines to
prevent contamination of hydraulic system.
Remove control valve mounting capscrews.
Disassembly
Refer to control valve illustration for
component identification.
Remove quick disconnect couplings and
adaptor fittings.
Plug all ports and thoroughly clean external
areas of control valve.
Remove single lever control components to
facilitate spool removal.
Relief Valve
Unscrew relief valve cap, followed by
adjustment screw. Unscrew relief valve body
and remove spring, cup, poppet, seat and
sealing washer.
Load Check Valve Service
The spring loaded check valve is located
adjacent to the bucket cylinder spool return
sprfng. Malfunctioning is most unlikely, but
contaminate can prevent free movement or
reseating.
Remove the check valve plug to reveal the
spring and poppet. Wash free of contaminate
and check for free movement of poppet with
valve body. Replace the poppet if damaged.
Reassemble in reverse order after valve body
is clean and drav.
,
Valve Spools
Prior to removal, mark valve spools to ensure
they can be identified for installation in the
same spool bores from which they were
removed.
.Lift Cylinder Spool (Float)
Remove the detent plugs, springs and balls
and remove the two detent body mounting
screws. Pull valve spool from valve body (pull
out from spring end of spool).
Remove the three valve spool '0' rings from
the valve body and one from the detent body.
Care must be taken to ensure valve body
spool bores are not scratched during 0 Rjng
removal.
Thoroughly clean all parts.
Inspection
Remove any nicks or burrs from valve
components and inspect for evidence of
excessive wear.
Inspect valve spools and valve body bores for
excessive wear, scratches or damage.
Imf If internal leakage with the valve
spool(s) in the spring centered position has
been experienced, valve body and/or valve
spool wear/damage is indicated. If this
condition exists the control valve assembly
must be replaced.
Inspect lift cylinder valve spool for excessive
wear in the detent area.
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