Deck Extensions and Ballast Box - Plan View

DECK EXTENSIONS

Right and left side deck extensions are bolted to each side of the revolving frame. They provide a mounting area for the electrical transformers and accessory machinery as well as supporting the machinery house walls.

Deck Extensions and Ballast Box - Plan View

BALLAST BOX

The ballast box is an all-welded steel fabrication located at the rear of the main revolving frame. A series of vertical plates in the box form compartments for holding ballast.

MACHINERY HOUSE

The machinery house encloses the revolving frame, ballast box and deck extensions. It is constructed of self-supporting steel panels with built-in framing. Removable roof sections are provided over the swing machinery and to the side and rear of the A-frame. The house also provides mounting for the air ventilation and pressurization system. A separate electrical room is located over the ballast box. Platforms and stairs facilitate access to the sides and tops of the house for inspection and maintenance purposes. A right-hand pivoting boarding stair and left-hand side boarding ladder permit easy access onto the machine.

VERTICAL BOARDING LADDER, LEFT

The vertical boarding ladder is one of the means for boarding the machine, located on the left-hand side of the machine, at the rear of the machinery house. Use the pull chord from ground level to lower the ladder. When the boarding ladder is not latched in place, the operator's controls are deactivated.

The ladder is a movable structure with a bracket and two rollers at four locations on the ladder. The rollers straddle a rail on each side of the ladder frame. Wire ropes (one on each side of the ladder) connect to the top of the ladder, pass up through sheaves and down to a counterweight inside each side of the ladder mounting frame.

The ladder should be in the UP position when at rest, with the weight of the counterweights holding it in place. If not, or if rough action is noted, check for binding in the rail structure, damaged or missing rollers, or binding with the counterweights.

Periodically check for lubricant in the sheaves at the top of the ladder.

BOARDING STAIRS

A set of boarding stairs is attached to the machinery house platform - either on the left side of the machine, the right side or both. When lowered, the stairs allow entrance to the machinery house from ground level. To activate the stairs, a chord attached to a lever arm is reachable from the ground. An additional lever is available at the top of the stairs. These stairs must be in their raised and latched position to enable the operator’s controls.

DANGER: STORED ENERGY! System may be under hydraulic pressure which can cause severe personal injury or death. Shut down pump and relieve system of all pressure before removing components.

The boarding stairs pivot about a pivot shaft attached to the boarding platform. A set of counterweights offsets the weight of the stairs. A self-contained hydraulic system, with an accumulator and cylinder, operates the stairs.