Probably because the patents on the Super-Vulcan hammers hadn’t run when Raymond saw the need to modify the Vulcan hammers, Raymond started by extensive modifications on the Vulcan 80C, which are similar to those they made later on the 65C. The result is the hammer shown above. There is no doubt that Raymond probably had as much money in the modifications–or more–than the original hammers, but as Charlie Guild observed to me, Raymond had “no idea” what their costs were.
That may not have been a problem. For one thing, Raymond’s superintendents had a reputation of being hard on the equipment; it was cheaper, in their view, to damage the equipment rather than to stop the job. Raymond’s equipment designers responded to this by making these hammers more rugged than the original Vulcan hammers, and that’s saying quite a bit.
Probably the modification that gave the best return on the investment was the conversion from column keys to cables, one that Vulcan eventually did on its hammers. With the 80C, it was faced with the same problem as Vulcan: how to deal with the steam belt, which got in the way of running the cables straight out of the columns. Vulcan’s solution is discussed here; Raymond opted to shift the cables slightly off column centre, using eccentric and concentric column sleeves. The result, coupled with running the cables to the head, worked well, especially with the Raymond Step-Taper piles, which were probably the most grueling test of a pile hammer ever devised for onshore piles.
It’s noteworthy that Pile Hammer Equipment, in its approach, “dog-legs” the cables a bit as they go to the head while keeping them concentric with the column, thus avoiding the steam belt.
Raymond went on to develop a “true” Raymond 80C as it had done with the 65C, but at this point documentation lacks for this hammer.
Specifications for Raymond’s 80C and other air/steam differential hammers are below.