sentences:  But the engines were made by Perkins Engines in England (Today most machines are fitted with Cummins engines, though).Before 1980, Hydrema bought tractors from companies like Volvo, so they could mount their own hydraulic equipment on the tractors.In 1983 Hydrema started producing their own dump trucks and in a short period in the late 1980s they also produced mobile building cranes.