Hyundai 35DS-7 Operation Manual page 189

During fitting O-ring to spool, care must
be taken not to damage O-ring.
( ( 3) Replacing relief valve assy and O-ring
Remove relief valve assy from mono
block.
Main relief valve
: Valve aset assy(Breadth 36mm(1.4in))
Secondary relief valve
: Relief valve assy(Breadth 21mm(0.8in))
Steering relief valve is not cartridge type ;
It's not to be disassembled under normal
circumstance.
Because is is necessary to reset
pressure.
In case of replacing O-ring, tighten Hex
nut(M18) with below tightening torque
value.
M18 : 21.7kgf m(157lbf ft)
Renew O-ring. If necessary, replace
relief valve assy.
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D357MCV13
D357MCV14
D357MCV15
D357MCV16