OHW-CATERPILLAR-WHEELED TRACTOR (621B / 621E / 621F / 621G / 623B / 623E / 623F / 623G / 627E / 627F / 627G / 631D / 631E / 631G / 633D / 633E II / 637D / 637E / 637G / 651E / 657E / 657G)-UNSPECIFIED-DIESEL-UNSPECIFIED-UNSPECIFIED