OPERATION 3.2 CONSTRUCTION OF THE SHOVEL Undercarriage and Superstructure (continued) Legend for illustration Z25190 (20) Swing gear LH front (21) Swing gear LH rear (22) Railing for emergency escape ladder on superstructure plat- form, see page 54 for more information (23) Main hydraulic oil cooler (24) Additional hydraulic oil cooler (25) Hydraulic oil reservoir (26) Emergency escape ladder on upper deck, see page 56 for more information (27) Pedestal for emergency escape ladder, see page 56 for more information (28) Emergency escape door in machinery house (29) Grease container with pump units for automatic lubrication systems (30) Engine air cleaners (31) Exhaust muffler (32) Emergency escape hatch and ladder in the machinery house, see page 58 for more information (33) Counterweight The chambers of the counterweight are filled with a mix- ture of concrete, granulated ore and steel pellets.
This mixture can create explosive gases which will accumulate in the chambers of the counterweight. Before any weld- ing, flame-cutting, grinding or drilling procedures are car- ried out on the counterweight it is vital to expel these gases from the counterweight chambers. Failure to prop- erly 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 expelling the gases from the counter- weight chambers. (34) Openings in the counterweight.
In case of a fire in the machin- ery house, these openings can be used for pouring fire extin- guishing agent into the machinery house. 43 WARNING WARNING