1
1-33
CONTROL VALVE 1.3
Disassembly / Repair 1300/135
(con’t)
4
Remove the control box from the spool linkage end.
The box needs to be tilted up towards the valve to release
the hardened ball on the control box pin from the hole in
the spool end and pull it away from the valve. (fig.
C3752).
5
Pull out the spool. (fig. C3754) 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.
C3752
C3754
C3757
6
Remove the check valves from the control valve
body (fig. C3757). They are located between the ports of
each section. Check the seat and poppet of the valve body
and check valve. Replace the check valve and/or the
control valve if any signs of wear are present.
Remove the
check valves
Inspect tapered
seats
