Hyundai HX145LCR Manual page 447

2. MAIN CONTROL VALVE 2. MAIN CONTROL VALVE
Part name
· Existence of scratch, rusting or corrosion.
Casing
·
Spool
Existence of scratch, gnawing, rusting or
corrosion.
·
O-ring seal sections at both ends.
·
Insert spool in casing hole, rotate and
reciprocate it.
·
Poppet Damage of poppet or spring
·
Insert poppet into casing and function it.
· Rusting, corrosion, deformation or breaking of
Around spring
spring, spring seat, plug or cover.
·
Around seal External oil leakage.
for spool
·
Rusting, 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
Criteria & measure
· In 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.
·
Replacement when its outside sliding section
has scratch (especially on seals-contacting
section).
·
Replacement when its sliding section has
scratch.
·
Correction or replacement when O-ring is
damaged or when spool does not move
smoothly.
·
Correction or replacement when sealing is
incomplete.
·
Normal 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.