Ropes - General Arrangement

CROWD MACHINERY

The crowd machinery is located at the front, center of the revolving frame. It consists of a motor, spring-set, air-released disc brake, drum and gearing. A crowd rotary encoder prevents overtravel of the dipper handle. With the crowd machinery on the revolving frame instead of the boom, front end weight is substantially reduced - resulting in lower swing inertia and reduced required swing effort. The entire machinery unit can be removed from the machine should maintenance or overhaul become necessary

Crowd Machinery Components

The crowd drum drives the crowd and retract rope system. Rope grooves are machined into the drum and flame hardened. The crowd and retract ropes are attached to the drum by ferrule-becket anchors which greatly simplifies rope changes.

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.