Hyundai r35z-7 Workshop Manual page 244

2 2 . MAIN CONTROL VALVE
Part name
Block Existence of scratch, rusting or corrosion.
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.
Around spring
Rusting, corrosion, deformation or breaking
of 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.
Contacting face of poppet.
Abnormal spring.
O-rings, back up rings and seals.
Inspection item
6-23
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.