Troy-Bilt 14066 - Manual (Page 29)

SERVICE
Control Valve
Control Valve Removal
Prior to removing control valve, ensure loader is
on the ground and all hydraulic lines are reileved
of oil pressure.Shut Tractor off engage parking
brake.
Disconnect hydraulic lines from Control Valve.
Cap “IN” and “RETURN” lines to prevent con­
tamination of hydraulic system.
Remove control valve mounting capscrews.
Disassembly
Refer to Control Valve illustration for component
identification.
Control Levers and Connections
Remove Quick Disconnect Couplings and Adap­
tor Fittings.
Plug all ports and thoroughly clean Control
Valve.
Disconnect control lever linkage from valve and
remove levers.
Load Check Poppets
Unscrew Load Check Poppet Plugs and remove
Load Check Poppets and Springs.
Relief Valve
Unscrew Relief Valve Cap, followed by Adjust­
ment Screw and remove Relief Valve Spring, Ball
retainer and Ball.
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.
r.vs
DUt
Bucket Cylinder Spool
Remove Valve Spoc! End Cap - " -j s
and puil Valve Spoci frc.n Va, ■ - (pun
from spring end of spec
Lift Cylinder Spool (Flees .)
Remove the Detent Gap Piu~s, Sc;: ss and naiis
and remove the two Decent d :.o no . ding
screws. Puil Valve Spool from Valve B r a y (pull
out from spring end of spool).
If spool centering springs require repiacement
remove as follows:
Bucket Cylinder Spool
Remove spring retainer mounting screw from
end of Valve Spool.
Lift Cylinder Spool (Float)
Unscrew Detent Spool from Valve Spool.
Remove the four Valve Spool O Rings from the
valve body.
Thoroughly clean all parts.
Inspection
Remove any nicks or burrs from valve com­
ponents and inspect for evidence of excessive
wear.
Note:
If internal leakage, with the Valve Spools in the
spring centered position has been experienced.
Valve Body and/or Valve Spool wear is indicated,
if this condition exists the Control Valve
Assembly must be replaced.
90-6