Shibaura ST318, Руководство по ремонту

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Disassembly, inspection and reassembly of control valve
*NOTE:
(1) Never disassemble the control valve during the claim warranty term (1 year or 600 hours). If disassembled,
claim will not be accepted.
(2) If it should be unavoidably disassembled, handle it very carefully since it is finished precisely.
Disassembling procedure
1 Relief valve
➀
Remove the plug and take out the shims, spring and
poppet.
➁
Remove the relief housing kit.
2 Spool
➀
Remove the snap ring
➁
Drive out the spring pin, extract the spool rearwards
until the O-ring on the rear side of the valve can be
removed, and remove the O-ring.
➂ Extract the spool forwards of the valve body and
remove 2 O-rings.
NOTE: If extracting in either one direction, the
O-ring is broken.
For reassembly, install 2 O-rings on the
front side, push the spool rearwards, install
the O-ring on the rear side and return
frontwards, in the reverse order.
Inspection and reassembly
➀
Relief valve ass’y
Replace the seat if the surface is worn out.
Plug tightening torque
34.3 – 39.2 N · m
(3.5 – 4.5 kgf
·
m)
➁ Spool and O-ring
Replace the spool and O-rings if oil leaks.
➂
When connecting the oil pressure take-out piping,
wind seal tape on it before tightening.
PT3/8 tightening torque
29.4 – 49 N · m
(3 – 5 kgf · m)
T660
T661
T662