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Coles County, Illinois | My HC 650 just has boom switches and a pressure increase and a pressure decrease. It's more like 15 years old. They offered a controller with a flow meter and speed pickup but few people bought them if they went with the diaphragm pump. Here's a parts book. The controllers start in Section G (G460). http://www.hardi-us.com/na/gallery/parts-books-spare-parts-drawings
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Hardi 650 Sprayer
