Hyundai R 160 LC-3, Service Manual

Page: 299 / 459

7 - 23
2. MAIN CONTROL VALVE
Part name Inspection item Criteria & measure
Existence of scratch, rusting or corrosion
Existence of scratch, gnawing, rusting or
corrosion
O-ring seal sections at both ends
Insert spool in casing hole, rotate and
reciprocate it
Damage of poppet or spring
Insert poppet into casing and function it
Rusting, corrosion, deformation or breaking
of spring, spring seat, plug or cover
External oil leakage
Rusting, corrosion or deformation of seal
plate
External rusting or damage
Contacting face of valve seat
Contacting face of poppet
Abnormal spring
O-rings, back up rings and seals
Casing
Spool
Poppet
Around spring
Around seal for spool
Main relief valve, port
relief valve & negative
control relief valve
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş
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
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş
ş