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Inspection after disassembly
Clean all disassembled parts with clean mineral oil fully, and dry them with compressed air.
Then, place them on clean papers or cloths for inspection.
Control valve
Check whole surfaces of all parts for burrs, scratches, notches and other defects.
Confirm that seal groove faces of body and block are smooth and free of dust, dent, rust etc.
Correct dents and damages and check seat faces within the body, if any, by lapping.
Pay careful attention not to leave any lapping agent within the body.
Confirm that all sliding and fitting parts can be moved manually and that all grooves and path's
are free foreign matter.
If any spring is broken or deformed, replace it with new one.
When a relief valve does not function properly, repair it, following it's the prescribed disassembly
and assembly procedures.
Replace all seals and O-rings with new ones.
Relief valve
Confirm that all seat faces at ends of all poppets and seats are free of defects and show uniform
and consistent contact faces.
Confirm manually that main poppet and seat can slide lightly and smoothly.
Confirm that outside face of main poppet and inside face of seat are free from scratches and so
on.
Confirm that springs are free from breakage, deformation, and wear.
Confirm that orifices of main poppet and seat section are not clogged with foreign matter.
Replace all O-rings with new ones.
When any light damage is found in above inspections, correct it by lapping.
When any abnormal part is found, replace it with a completely new relief valve assembly.
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d.
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f.
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Η
Η
a.
b.
c.
d.
e.
f.
g.
h.
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