Hyundai HX130LCR Manual page 415

2. MAIN CONTROL VALVE
Part name
Casing ·Existence of scratch, rusting or corrosion.
Spool  E xistence of scratch, gnawing, rusting or
·
corrosion.
O-ring seal sections at both ends.
·
 I nsert spool in casing hole, rotate and
·
reciprocate it.
Poppet Damage of poppet or spring
·
Insert poppet into casing and function it.
·
Around spring · R usting, corrosion, deformation or breaking of
spring, spring seat, plug or cover.
Around seal External oil leakage.
·
for spool
 R usting, corrosion or deformation of seal
·
plate.
Main relief valve, External rusting or damage.
·
port relief valve &
Contacting face of valve seat.
·
negative control
relief valve Contacting face of poppet.
·
Abnormal spring.
·
O-rings, back up rings and seals.
·
Inspection item
7-22 7-22
Criteria & measure
· I n case of damage in following section, replace
part.
- Sliding sections of casing fore and spool,
especially land sections applied with holded
pressure.
- Seal pocket section where spool is inserted.
- Seal section of port where O-ring contacts.
- Seal section of each relief valve for main,
travel, and port.
- Other damages that may damage normal
functions.
 R eplacement when its outside sliding section
·
has scratch (especially on seals-contacting
section).
Replacement when its sliding section has
·
scratch.
 C orrection or replacement when O-ring is
·
damaged or when spool does not move
smoothly.
 C orrection or replacement when sealing is
·
incomplete.
 N ormal when it can function lightly without
·
being caught.
·Replacement for significant damage.
Correction or replacement.
·
Correction or replacement.
·
Replacement.
·
Replacement when damaged.
·
Replacement when damaged.
·
Replacement.
·
100% replacement in general.
·