870GLC - EXCAVATOR 2162 Hydraulic Selective Control & Load Holding Valves Relief Valve For full view, you need register Parts on group Relief Valve: Pos. Part No Qty Parts name Comments 0. 4639978 [1] Pressure Relief Valve 14. ........ [1] Housing 0980401 NLA 16. 0314205 [1] Plug 20. 957366 [1] O-Ring 21. U12547U [1] O-Ring 25. 4658562 [1] Pressure Relief Valve