OPERATION 3.2 CONSTRUCTION OF THE SHOVEL Legend for illustration Z25473 (continued) (16) Counter weight The chambers of the counterweight are filled with a mixture of concrete, granulated ore and steel pellets. This mixture can create explosive gases which will accumulate in the chambers of the counterweight. Before any welding, flame-cutting, grinding or drilling procedures are carried out on the counterweight it is vital to expel these gases from the counterweight chambers. Failure to properly expel the gases from the counterweight chambers can result in an explosion with serious personal injury or death. Follow the instructions given in PARTS & SERVICE NEWS No.
AH04518 for expel- ling the gases from the counterweight chambers. (17) Main control valves with high pressure in-line filters (18) Hydraulic oil reservoir (19) Return oil filters (20) Hydraulic oil cooler (21) Swing machinery (22) Distributor manifold (23) Swing circle pinion Lubrication System (SLS) (24) Central Lubrication System (CLS) 43 WARNING WARNING