Crowd Machinery Components

OPERATOR’S CAB

The isolated and elevated operator’s cab at the right, front of the machinery house provides a comfortable, safe and efficient working environment for the operator. Sufficient space is provided for the fully adjustable operator’s seat, a helper’s seat and the standard operator’s display panel.

All operating controls are incorporated into the arms of the seat.

The cab is sound and heat insulated with interior walls made of a sound deadening steel-plasticsteel composite. Electric powered windshield wipers are provided for quiet, dependable operation. A one-piece front window is supplied in a rugged, easy-to-change frame. A forward front window slant with over hanging roof helps keep the window clean. Transparent sun shades are provided in front and side windows.

Visibility through both side and front windows is excellent. The operator has the best view in the industry of the digging face and for truck spotting. This view is enhanced by the streamlined sides and top surfaces of the boom, unencumbered by crowd machinery or dipper handles on the outside of the boom.

An air conditioner and pressurizing unit utilizes environmentally friendly 134a refrigerant in the cooling system. Interior ducting distributes the airflow to best suit the comfort of the operator.

COMPRESSED AIR SYSTEM

The compressed air system consists of a rotary screw type air compressor, air receiver, air brakes, controls and center pintle air swivel. Hydraulic high pressure hose is used throughout. The air system is used to operate all machinery motion brakes and lubrication components and to perform various other functions.

AUTOMATIC LUBRICATION SYSTEM

The lube system is located in an insulated, double wall, lube room which can be heated for cold weather operation. A one ton (907 kg) monorail-mounted electric chain hoist is provided to be used to raise supplies from the ground onto the left house platform and into the lube room. Lube points on the electric motors, suspension rope pins and some dipper pins are manually accessed. All other lube points are fed from the automatic system or by oil bath.

A single-line automatic lubrication system applies open gear lubricant (OGL) and grease via a programmable logic controller (PLC). The system has six lube pumps (four for OGL and two for grease), each feeding individual PLC controlled circuits. Lincoln Powermaster Four 75:1 air powered pumps are mounted on two reservoirs. High pressure hoses with reusable fittings are utilized.

Lubrication Room

The six separately controlled lube circuits provide selective distribution frequency and quantity resulting in reduced lubricant usage and cost.