Diesel Engine Speed Control Unit SY-SC-2032 1, Common use, for the speed control of ... 2, Approved by ISO9001:2008 Diesel Engine Speed Control Unit SY-SC-20321,General desciption2032 Speed control unit Series Speed Control ... teeth. The gap should not be any smaller than 0.020 in. (0.45mm). Usually, backing out the speed sensor ... by ISO9001:2008 standard. Diesel Engine Speed Control Unit SY-SC-2032