Caterpillar's $820 million deal to acquire Electro-Motive Diesel should allow it to make up ground lost to General Electric in the North American locomotive market, Electro-Motive CEO John Hamilton said. Some customers were worried about Electro-Motive's viability in what is essentially a two-company market, Hamilton said. "That anxiety completely vanishes," he said. "Customers are reacting positively to this deal. They've got a strong supplier to buy locomotives from."