The History of Rammer/Sandvik Hydraulic Breakers

Rammer Hydraulic Hammers were, although some still are, made by a Swedish company called Sandvik. Rammer, or Sandvik, has cooperated with Allied hydraulic breakers for quite some time. Many of their hoe rams were branded as “Allied/Rammer”. We are unsure of all of the facts, but it appears that recently all three well-known names, Allied, Rammer, and Sandvik, are now under the Sandvik umbrella.  

Nearly all of their early models were considered to be fully hydraulic hammers. The hydraulic design of hoe rams do not use nitrogen to make its power. Instead, it uses hydraulic power to lift the piston before the strike, as well as hydraulic power and momentum to bring the piston down on each strike. All fully hydraulic breakers utilize a nitrogen filled accumulator at the top to absorb internal hydraulic spikes. These accumulators have a diaphragm inside, which requires charging and replacement from time to time. There is no such thing as a permanently sealed hydraulic accumulator, despite marketing material to the contrary. If it did, the nitrogen accumulators would not have a port or require a charge kit to add nitrogen. Other fully hydraulic hammer designs are used by Tramac, Montabert, Indeco, Sandvik, and early Caterpillars.