Hyundai r35z-7 Workshop Manual page 301

(4) Disassembly of the main and overload
relief valve
Fix the body to suitable work bench.
Remove the main relief valve(14).
(Spanner : 30mm)
Remove the overload relief valve(15).
(Spanner : 22mm)
When disassembled, tag the relief valve
for identification so that they can be
reassembled correctly.
Pay attention not to damage seat face.
When any abnormal parts are found,
replace it with completely new relief valve
assembly.
7-41
14
R35Z77MCV09
15
R35Z77MCV10