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A quick way to check the correct position of the slide bar is shown in the drawing and picture above.

Place a straightedge across the machined boss area of the Ram as shown in the picture. The lower edge of the straightedge should be even with the "break" of the round stock of the slide bar as circled in the drawing.

Note: strictly speaking, this only applied to hammers of the "020" series or smaller. Hammers larger than this have a gap between the straight edge and the slide bar break. Details on this are available in the Guide to Pile Driving Equipment.

Driven Pile Manual Volume 1a
Driven Pile Manual 1b
Driven Pile Manual 2