Hyundai HX145LCR Manual page 505

(5) Disassembly of the main and overload relief valve
Fix the body to suitable work bench.
Remove the main relief valve.
(spanner : 32 mm)
Remove the overload relief valve.
(spanner : 32 mm)
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.
32mm HEX
Main relief valve
32mm HEX
Overload relief valve
145LCR8MC14
8-42