DISASSEMBLY, ASSEMBLY AND
INSPECTION OF THE PILOT
C O N T R O L VALVE
PREPARATION FOR REMOVAL OF
DISASSEMBLY
VALVE FROM MACHINE
Remove the three tie rod nuts from one side of
Thoroughly clean the outside of the valve. To
the valve. Before removing tie rods and separating
insure accurate reassembly of the valve, tag all
sections, caution must be observed to avoid losing
inlet, end cap and control ports prior to removing
load check poppets and springs which are enclosed
the valve from the machine. Prepare a clean and
between the sections. Tag the check poppets
a d e q u a t e work area before disassembling. Re-
with respect to their plunger section. An O-ring is
move valve from machine and position on mount-
also present between the sections.
ing pads.
Slide the three tie rods from the valve and sep-
a r a t e sections. Remove check poppet (24) spring
Care must be exercised to protect all machined
(25) and O-ring seal (26). (See below)
surfaces.
surface using fine lapping compound. Clean sec-
M a i n t e n a n c e of the inlet and end cap section
tion thoroughly when finished. Remove plugs and
consists of visually inspecting the machined seal-
O-rings from inlet section. Examine O-rings for
ing surfaces for scratches or nicks. If present, re-
damage or deterioration. Replace if necessary.
move by lapping on a perfectly smooth flat steel
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