1
C3717
6
Remove the check valves from control valve body.
(fig. C3717) They are located between the ports of each
section. Check the seat and poppet of the valve body and
check valve.
Check Valve
1-27
C3706
C3709
C3713
4
Remove the control box from the spool linkage end.
(fig. C3709) The box needs to be tilted upward towards
the valve to release the hardened ball from the hole in the
spool end, and then pull away from the valve.
5
Pull out the spool. (fig. C3713) As you pull out the
spool, note it’s smooth action as it comes out of the valve
body. The spool should move freely and smoothly in the
bore of the valve body. Check the control valve spool and
bore for scuff marks or abnormal wear. Replace the spool
and or control valve if signs of wear are present.
Disassembly / Repair 137/153
(cont’d)
Spool Linkage
CONTROL VALVE 1.3
Removing the spools from the valve.
