The inverted 'T' rocker at the head of the engine shaft was one of the more intact piece's of machinery on the site. After the re-instating of the flat rod system in 1988, the rocker was re-connected, balanced and painted by the mines research group.

At the southern end, is a pit for the counterweight bucket which would be identical to the one on the front of the great wheel. The pit was full of earth and was dug out by the group in 1986 to find only the metalwork remaining. 

At the other end is the shaft which has collapsed at adit. The pump rods are no longer connected and the rocker is balanced with iron and lead weights.                 

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